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How to log Drops from advanced-firewall checks

AndreasHämmerle

Hello,

We have a clients-server based application, where the server is in a different vlan as the clients.

The communication between both vlans is routed via SophosXG VLAN Interfaces. (XG430 / 18.5MR1)

The GUI firewall rules are configured to allow everything for both vlan-networks in each direction.

However, this client-server based application doesn't work with this setup.

Only way to get the application working as expected is to set advanced-firewall bypass via CLI

I assume that the application is not working 100% RFC conform and for example the XG tcp-seq-checking drops the packege.

My problem is, I cant see any dropped packeg in any log on XG firewall.

I need to know exactly why the firewall is dropping that traffic in order to contact the application vendors if something is not RFC compliant at application side.

Can you please tell me how to log such kind of drops from the advanced-firewall checks.

Thank you for help!



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  • 0

    Hi,

    using logviewer refine your search to the server's IP address to see where the traffic might be  going?

    Ian

  • 0 in reply to rfcat_vk

    I already filtered the GUI LogViewer for source/destination and cant see any problem relaited logs entries.

    No invalid traffic or something like that.

    I tried to enable all Log-Options in SystemServices -> LogSettings -> Local Reporting but still no log entry while reproducting the problem.

  • 0 in reply to AndreasHämmerle

    Hi,

    you need to capture a number of packets and review their sequence numbers. You might check the server to see if it has the capability of  reordering packets into correct sequence setting or something similar.

    ian

  • 0 in reply to AndreasHämmerle

    I highly recommend to not do a stateful bypass. 

    Instead remove those commands, use drppkt on the firewall and check, which module is dropping them. 

    Then check, if there are no drops, via tcpdump, what the routing is about. 

  • 0 in reply to LuCar Toni

    The stateful bypass is only a workaround until the source-problem is detected and solved. It is in my interest to delete this again as soon as possible

    dropped-packet-capture filterd by source/destination doesn't log one line while reproducing the problem (bypass rules where temporary deleted for testing)

    I already tried tcpdump once and once again and cant find anything usable output for my problem.

    Is there any log-file where these drops from advanced firewall are visible?

    For example for tcp-seq-checking -> is there any log where to see which packeges are dropped from this "module"?

  • 0 in reply to AndreasHämmerle

    Likely this is a routing issue.

    If you check for the ports, your app is using: tcpdump -ni any port #number# 

    It should show you the network flow. Likely it is asymmetrical routing. 

    What are the ports used? 

    You should stop expecting a "core issue" and start looking at the network basics. Because it is most likely some basic issue like routing or something like that. 

  • 0 in reply to LuCar Toni

    At the Server (172.17.1.11) there is a IIS running on Port 8080

    Also at the Server there is the application Ivanti DSM Console installed which connects to the IIS via Port 8080.

    On the client (172.17.2.11), the application DSM Console is started via UNC link from Server via SMB 445.

    The application first starts normaly and while connecting to the IIS on Port 8080 the connection could not be established.

    tcpdump (while bypassrule is deleted)

    XG430_WP02_SFOS 18.5.1 MR-1-Build326# tcpdump -ni any port 8080
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on any, link-type LINUX_SLL (Linux cooked v1), capture size 262144 bytes
16:54:38.905706 Port9, IN: ethertype IPv4, IP 172.17.2.11.52472 > 172.17.1.11.8080: Flags [SEW], seq 1558794702, win 8192, options [mss 1460,nop,wscale 8,nop,nop,sackOK], length 0
16:54:38.905706 LAG_DSW, IN: ethertype IPv4, IP 172.17.2.11.52472 > 172.17.1.11.8080: Flags [SEW], seq 1558794702, win 8192, options [mss 1460,nop,wscale 8,nop,nop,sackOK], length 0
16:54:38.905706 LAG_DSW.102, IN: IP 172.17.2.11.52472 > 172.17.1.11.8080: Flags [SEW], seq 1558794702, win 8192, options [mss 1460,nop,wscale 8,nop,nop,sackOK], length 0
16:54:38.906018 LAG_DSW.101, OUT: IP 172.17.2.11.52472 > 172.17.1.11.8080: Flags [SEW], seq 1558794702, win 8192, options [mss 1460,nop,wscale 8,nop,nop,sackOK], length 0
16:54:38.906020 LAG_DSW, OUT: ethertype IPv4, IP 172.17.2.11.52472 > 172.17.1.11.8080: Flags [SEW], seq 1558794702, win 8192, options [mss 1460,nop,wscale 8,nop,nop,sackOK], length 0
16:54:38.906020 Port10, OUT: ethertype IPv4, IP 172.17.2.11.52472 > 172.17.1.11.8080: Flags [SEW], seq 1558794702, win 8192, options [mss 1460,nop,wscale 8,nop,nop,sackOK], length 0
16:54:38.906255 Port9, IN: ethertype IPv4, IP 172.17.1.11.8080 > 172.17.2.11.52472: Flags [S.E], seq 3154676273, ack 1558794703, win 8192, options [mss 1460,nop,wscale 8,nop,nop,sackOK], length 0
16:54:38.906255 LAG_DSW, IN: ethertype IPv4, IP 172.17.1.11.8080 > 172.17.2.11.52472: Flags [S.E], seq 3154676273, ack 1558794703, win 8192, options [mss 1460,nop,wscale 8,nop,nop,sackOK], length 0
16:54:38.906255 LAG_DSW.101, IN: IP 172.17.1.11.8080 > 172.17.2.11.52472: Flags [S.E], seq 3154676273, ack 1558794703, win 8192, options [mss 1460,nop,wscale 8,nop,nop,sackOK], length 0
16:54:38.906418 LAG_DSW.102, OUT: IP 172.17.1.11.8080 > 172.17.2.11.52472: Flags [S.E], seq 3154676273, ack 1558794703, win 8192, options [mss 1460,nop,wscale 8,nop,nop,sackOK], length 0
16:54:38.906419 LAG_DSW, OUT: ethertype IPv4, IP 172.17.1.11.8080 > 172.17.2.11.52472: Flags [S.E], seq 3154676273, ack 1558794703, win 8192, options [mss 1460,nop,wscale 8,nop,nop,sackOK], length 0
16:54:38.906420 Port10, OUT: ethertype IPv4, IP 172.17.1.11.8080 > 172.17.2.11.52472: Flags [S.E], seq 3154676273, ack 1558794703, win 8192, options [mss 1460,nop,wscale 8,nop,nop,sackOK], length 0
16:54:38.906629 Port9, IN: ethertype IPv4, IP 172.17.2.11.52472 > 172.17.1.11.8080: Flags [.], ack 1, win 8212, length 0
16:54:38.906629 LAG_DSW, IN: ethertype IPv4, IP 172.17.2.11.52472 > 172.17.1.11.8080: Flags [.], ack 1, win 8212, length 0
16:54:38.906629 LAG_DSW.102, IN: IP 172.17.2.11.52472 > 172.17.1.11.8080: Flags [.], ack 1, win 8212, length 0
16:54:38.906629 Port9, IN: ethertype IPv4, IP 172.17.2.11.52472 > 172.17.1.11.8080: Flags [P.], seq 1:243, ack 1, win 8212, length 242: HTTP: POST /blsAdministration/AdministrationService.asmx HTTP/1.1
16:54:38.906629 LAG_DSW, IN: ethertype IPv4, IP 172.17.2.11.52472 > 172.17.1.11.8080: Flags [P.], seq 1:243, ack 1, win 8212, length 242: HTTP: POST /blsAdministration/AdministrationService.asmx HTTP/1.1
16:54:38.906629 LAG_DSW.102, IN: IP 172.17.2.11.52472 > 172.17.1.11.8080: Flags [P.], seq 1:243, ack 1, win 8212, length 242: HTTP: POST /blsAdministration/AdministrationService.asmx HTTP/1.1
16:54:38.906630 Port9, IN: ethertype IPv4, IP 172.17.2.11.52472 > 172.17.1.11.8080: Flags [P.], seq 243:1177, ack 1, win 8212, length 934: HTTP
16:54:38.906630 LAG_DSW, IN: ethertype IPv4, IP 172.17.2.11.52472 > 172.17.1.11.8080: Flags [P.], seq 243:1177, ack 1, win 8212, length 934: HTTP
16:54:38.906878 LAG_DSW.101, OUT: IP 172.17.2.11.52472 > 172.17.1.11.8080: Flags [.], ack 1, win 8212, length 0
16:54:38.906880 LAG_DSW, OUT: ethertype IPv4, IP 172.17.2.11.52472 > 172.17.1.11.8080: Flags [.], ack 1, win 8212, length 0
16:54:38.906881 Port10, OUT: ethertype IPv4, IP 172.17.2.11.52472 > 172.17.1.11.8080: Flags [.], ack 1, win 8212, length 0
16:54:38.906883 LAG_DSW.101, OUT: IP 172.17.2.11.52472 > 172.17.1.11.8080: Flags [P.], seq 1:243, ack 1, win 8212, length 242: HTTP: POST /blsAdministration/AdministrationService.asmx HTTP/1.1
16:54:38.906883 LAG_DSW, OUT: ethertype IPv4, IP 172.17.2.11.52472 > 172.17.1.11.8080: Flags [P.], seq 1:243, ack 1, win 8212, length 242: HTTP: POST /blsAdministration/AdministrationService.asmx HTTP/1.1
16:54:38.906884 Port10, OUT: ethertype IPv4, IP 172.17.2.11.52472 > 172.17.1.11.8080: Flags [P.], seq 1:243, ack 1, win 8212, length 242: HTTP: POST /blsAdministration/AdministrationService.asmx HTTP/1.1
16:54:38.915907 Port9, IN: ethertype IPv4, IP 172.17.1.11.8080 > 172.17.2.11.52472: Flags [.], seq 1:1461, ack 243, win 8212, length 1460: HTTP: HTTP/1.1 401 Unauthorized
16:54:38.915907 LAG_DSW, IN: ethertype IPv4, IP 172.17.1.11.8080 > 172.17.2.11.52472: Flags [.], seq 1:1461, ack 243, win 8212, length 1460: HTTP: HTTP/1.1 401 Unauthorized
16:54:38.915907 LAG_DSW.101, IN: IP 172.17.1.11.8080 > 172.17.2.11.52472: Flags [.], seq 1:1461, ack 243, win 8212, length 1460: HTTP: HTTP/1.1 401 Unauthorized
16:54:38.915907 Port9, IN: ethertype IPv4, IP 172.17.1.11.8080 > 172.17.2.11.52472: Flags [P.], seq 1461:1511, ack 243, win 8212, length 50: HTTP
16:54:38.915907 LAG_DSW, IN: ethertype IPv4, IP 172.17.1.11.8080 > 172.17.2.11.52472: Flags [P.], seq 1461:1511, ack 243, win 8212, length 50: HTTP
16:54:38.915907 LAG_DSW.101, IN: IP 172.17.1.11.8080 > 172.17.2.11.52472: Flags [P.], seq 1461:1511, ack 243, win 8212, length 50: HTTP
16:54:38.916071 LAG_DSW.101, OUT: IP 172.17.2.11.52472 > 172.17.1.11.8080: Flags [R.], seq 243, ack 1461, win 0, length 0
16:54:38.916074 LAG_DSW, OUT: ethertype IPv4, IP 172.17.2.11.52472 > 172.17.1.11.8080: Flags [R.], seq 243, ack 1461, win 0, length 0
16:54:38.916074 Port10, OUT: ethertype IPv4, IP 172.17.2.11.52472 > 172.17.1.11.8080: Flags [R.], seq 243, ack 1461, win 0, length 0
16:54:38.916079 LAG_DSW.102, OUT: IP 172.17.1.11.8080 > 172.17.2.11.52472: Flags [R.], seq 1, ack 243, win 0, length 0
16:54:38.916079 LAG_DSW, OUT: ethertype IPv4, IP 172.17.1.11.8080 > 172.17.2.11.52472: Flags [R.], seq 1, ack 243, win 0, length 0
16:54:38.916080 Port10, OUT: ethertype IPv4, IP 172.17.1.11.8080 > 172.17.2.11.52472: Flags [R.], seq 1, ack 243, win 0, length 0

    tcpdump (while bypassrule is set)

    XG430_WP02_SFOS 18.5.1 MR-1-Build326# tcpdump -ni any port 8080
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on any, link-type LINUX_SLL (Linux cooked v1), capture size 262144 bytes
17:04:18.674050 Port9, IN: ethertype IPv4, IP 172.17.2.11.52580 > 172.17.1.11.8080: Flags [SEW], seq 2490550846, win 8192, options [mss 1460,nop,wscale 8,nop,nop,sackOK], length 0
17:04:18.674050 LAG_DSW, IN: ethertype IPv4, IP 172.17.2.11.52580 > 172.17.1.11.8080: Flags [SEW], seq 2490550846, win 8192, options [mss 1460,nop,wscale 8,nop,nop,sackOK], length 0
17:04:18.674050 LAG_DSW.102, IN: IP 172.17.2.11.52580 > 172.17.1.11.8080: Flags [SEW], seq 2490550846, win 8192, options [mss 1460,nop,wscale 8,nop,nop,sackOK], length 0
17:04:18.674057 LAG_DSW.101, OUT: IP 172.17.2.11.52580 > 172.17.1.11.8080: Flags [SEW], seq 2490550846, win 8192, options [mss 1460,nop,wscale 8,nop,nop,sackOK], length 0
17:04:18.674059 LAG_DSW, OUT: ethertype IPv4, IP 172.17.2.11.52580 > 172.17.1.11.8080: Flags [SEW], seq 2490550846, win 8192, options [mss 1460,nop,wscale 8,nop,nop,sackOK], length 0
17:04:18.674060 Port10, OUT: ethertype IPv4, IP 172.17.2.11.52580 > 172.17.1.11.8080: Flags [SEW], seq 2490550846, win 8192, options [mss 1460,nop,wscale 8,nop,nop,sackOK], length 0
17:04:18.674218 Port9, IN: ethertype IPv4, IP 172.17.1.11.8080 > 172.17.2.11.52580: Flags [S.E], seq 3316352020, ack 2490550847, win 8192, options [mss 1460,nop,wscale 8,nop,nop,sackOK], length 0
17:04:18.674218 LAG_DSW, IN: ethertype IPv4, IP 172.17.1.11.8080 > 172.17.2.11.52580: Flags [S.E], seq 3316352020, ack 2490550847, win 8192, options [mss 1460,nop,wscale 8,nop,nop,sackOK], length 0
17:04:18.674218 LAG_DSW.101, IN: IP 172.17.1.11.8080 > 172.17.2.11.52580: Flags [S.E], seq 3316352020, ack 2490550847, win 8192, options [mss 1460,nop,wscale 8,nop,nop,sackOK], length 0
17:04:18.674224 LAG_DSW.102, OUT: IP 172.17.1.11.8080 > 172.17.2.11.52580: Flags [S.E], seq 3316352020, ack 2490550847, win 8192, options [mss 1460,nop,wscale 8,nop,nop,sackOK], length 0
17:04:18.674225 LAG_DSW, OUT: ethertype IPv4, IP 172.17.1.11.8080 > 172.17.2.11.52580: Flags [S.E], seq 3316352020, ack 2490550847, win 8192, options [mss 1460,nop,wscale 8,nop,nop,sackOK], length 0
17:04:18.674225 Port10, OUT: ethertype IPv4, IP 172.17.1.11.8080 > 172.17.2.11.52580: Flags [S.E], seq 3316352020, ack 2490550847, win 8192, options [mss 1460,nop,wscale 8,nop,nop,sackOK], length 0
17:04:18.674720 Port9, IN: ethertype IPv4, IP 172.17.2.11.52580 > 172.17.1.11.8080: Flags [.], ack 1, win 8212, length 0
17:04:18.674720 LAG_DSW, IN: ethertype IPv4, IP 172.17.2.11.52580 > 172.17.1.11.8080: Flags [.], ack 1, win 8212, length 0
17:04:18.674720 LAG_DSW.102, IN: IP 172.17.2.11.52580 > 172.17.1.11.8080: Flags [.], ack 1, win 8212, length 0
17:04:18.674725 LAG_DSW.101, OUT: IP 172.17.2.11.52580 > 172.17.1.11.8080: Flags [.], ack 1, win 8212, length 0
17:04:18.674725 LAG_DSW, OUT: ethertype IPv4, IP 172.17.2.11.52580 > 172.17.1.11.8080: Flags [.], ack 1, win 8212, length 0
17:04:18.674726 Port10, OUT: ethertype IPv4, IP 172.17.2.11.52580 > 172.17.1.11.8080: Flags [.], ack 1, win 8212, length 0
17:04:18.674850 Port9, IN: ethertype IPv4, IP 172.17.2.11.52580 > 172.17.1.11.8080: Flags [P.], seq 1:243, ack 1, win 8212, length 242: HTTP: POST /blsAdministration/AdministrationService.asmx HTTP/1.1
17:04:18.674850 LAG_DSW, IN: ethertype IPv4, IP 172.17.2.11.52580 > 172.17.1.11.8080: Flags [P.], seq 1:243, ack 1, win 8212, length 242: HTTP: POST /blsAdministration/AdministrationService.asmx HTTP/1.1
17:04:18.674850 LAG_DSW.102, IN: IP 172.17.2.11.52580 > 172.17.1.11.8080: Flags [P.], seq 1:243, ack 1, win 8212, length 242: HTTP: POST /blsAdministration/AdministrationService.asmx HTTP/1.1
17:04:18.674857 LAG_DSW.101, OUT: IP 172.17.2.11.52580 > 172.17.1.11.8080: Flags [P.], seq 1:243, ack 1, win 8212, length 242: HTTP: POST /blsAdministration/AdministrationService.asmx HTTP/1.1
17:04:18.674858 LAG_DSW, OUT: ethertype IPv4, IP 172.17.2.11.52580 > 172.17.1.11.8080: Flags [P.], seq 1:243, ack 1, win 8212, length 242: HTTP: POST /blsAdministration/AdministrationService.asmx HTTP/1.1
17:04:18.674858 Port10, OUT: ethertype IPv4, IP 172.17.2.11.52580 > 172.17.1.11.8080: Flags [P.], seq 1:243, ack 1, win 8212, length 242: HTTP: POST /blsAdministration/AdministrationService.asmx HTTP/1.1
17:04:18.674851 Port9, IN: ethertype IPv4, IP 172.17.2.11.52580 > 172.17.1.11.8080: Flags [P.], seq 243:1177, ack 1, win 8212, length 934: HTTP
17:04:18.674851 LAG_DSW, IN: ethertype IPv4, IP 172.17.2.11.52580 > 172.17.1.11.8080: Flags [P.], seq 243:1177, ack 1, win 8212, length 934: HTTP
17:04:18.674996 Port9, IN: ethertype IPv4, IP 172.17.1.11.8080 > 172.17.2.11.52580: Flags [.], ack 1177, win 8212, length 0
17:04:18.674996 LAG_DSW, IN: ethertype IPv4, IP 172.17.1.11.8080 > 172.17.2.11.52580: Flags [.], ack 1177, win 8212, length 0
17:04:18.674996 LAG_DSW.101, IN: IP 172.17.1.11.8080 > 172.17.2.11.52580: Flags [.], ack 1177, win 8212, length 0
17:04:18.675002 LAG_DSW.102, OUT: IP 172.17.1.11.8080 > 172.17.2.11.52580: Flags [.], ack 1177, win 8212, length 0
17:04:18.675003 LAG_DSW, OUT: ethertype IPv4, IP 172.17.1.11.8080 > 172.17.2.11.52580: Flags [.], ack 1177, win 8212, length 0
17:04:18.675003 Port10, OUT: ethertype IPv4, IP 172.17.1.11.8080 > 172.17.2.11.52580: Flags [.], ack 1177, win 8212, length 0
17:04:18.677552 Port9, IN: ethertype IPv4, IP 172.17.1.11.8080 > 172.17.2.11.52580: Flags [.], seq 1:1461, ack 1177, win 8212, length 1460: HTTP: HTTP/1.1 401 Unauthorized
17:04:18.677552 LAG_DSW, IN: ethertype IPv4, IP 172.17.1.11.8080 > 172.17.2.11.52580: Flags [.], seq 1:1461, ack 1177, win 8212, length 1460: HTTP: HTTP/1.1 401 Unauthorized
17:04:18.677552 LAG_DSW.101, IN: IP 172.17.1.11.8080 > 172.17.2.11.52580: Flags [.], seq 1:1461, ack 1177, win 8212, length 1460: HTTP: HTTP/1.1 401 Unauthorized
17:04:18.677558 LAG_DSW.102, OUT: IP 172.17.1.11.8080 > 172.17.2.11.52580: Flags [.], seq 1:1461, ack 1177, win 8212, length 1460: HTTP: HTTP/1.1 401 Unauthorized
17:04:18.677559 LAG_DSW, OUT: ethertype IPv4, IP 172.17.1.11.8080 > 172.17.2.11.52580: Flags [.], seq 1:1461, ack 1177, win 8212, length 1460: HTTP: HTTP/1.1 401 Unauthorized
17:04:18.677560 Port10, OUT: ethertype IPv4, IP 172.17.1.11.8080 > 172.17.2.11.52580: Flags [.], seq 1:1461, ack 1177, win 8212, length 1460: HTTP: HTTP/1.1 401 Unauthorized
17:04:18.677552 Port9, IN: ethertype IPv4, IP 172.17.1.11.8080 > 172.17.2.11.52580: Flags [P.], seq 1461:1511, ack 1177, win 8212, length 50: HTTP
17:04:18.677552 LAG_DSW, IN: ethertype IPv4, IP 172.17.1.11.8080 > 172.17.2.11.52580: Flags [P.], seq 1461:1511, ack 1177, win 8212, length 50: HTTP
17:04:18.677681 Port9, IN: ethertype IPv4, IP 172.17.2.11.52580 > 172.17.1.11.8080: Flags [.], ack 1511, win 8212, length 0
17:04:18.677681 LAG_DSW, IN: ethertype IPv4, IP 172.17.2.11.52580 > 172.17.1.11.8080: Flags [.], ack 1511, win 8212, length 0
17:04:18.677681 LAG_DSW.102, IN: IP 172.17.2.11.52580 > 172.17.1.11.8080: Flags [.], ack 1511, win 8212, length 0
17:04:18.677686 LAG_DSW.101, OUT: IP 172.17.2.11.52580 > 172.17.1.11.8080: Flags [.], ack 1511, win 8212, length 0
17:04:18.677687 LAG_DSW, OUT: ethertype IPv4, IP 172.17.2.11.52580 > 172.17.1.11.8080: Flags [.], ack 1511, win 8212, length 0
17:04:18.677688 Port10, OUT: ethertype IPv4, IP 172.17.2.11.52580 > 172.17.1.11.8080: Flags [.], ack 1511, win 8212, length 0
17:04:18.791519 Port9, IN: ethertype IPv4, IP 172.17.2.11.52580 > 172.17.1.11.8080: Flags [.], seq 1177:2637, ack 1511, win 8212, length 1460: HTTP: POST /blsAdministration/AdministrationService.asmx HTTP/1.1
17:04:18.791519 LAG_DSW, IN: ethertype IPv4, IP 172.17.2.11.52580 > 172.17.1.11.8080: Flags [.], seq 1177:2637, ack 1511, win 8212, length 1460: HTTP: POST /blsAdministration/AdministrationService.asmx HTTP/1.1
17:04:18.791519 LAG_DSW.102, IN: IP 172.17.2.11.52580 > 172.17.1.11.8080: Flags [.], seq 1177:2637, ack 1511, win 8212, length 1460: HTTP: POST /blsAdministration/AdministrationService.asmx HTTP/1.1
17:04:18.791529 LAG_DSW.101, OUT: IP 172.17.2.11.52580 > 172.17.1.11.8080: Flags [.], seq 1177:2637, ack 1511, win 8212, length 1460: HTTP: POST /blsAdministration/AdministrationService.asmx HTTP/1.1
17:04:18.791531 LAG_DSW, OUT: ethertype IPv4, IP 172.17.2.11.52580 > 172.17.1.11.8080: Flags [.], seq 1177:2637, ack 1511, win 8212, length 1460: HTTP: POST /blsAdministration/AdministrationService.asmx HTTP/1.1
17:04:18.791532 Port10, OUT: ethertype IPv4, IP 172.17.2.11.52580 > 172.17.1.11.8080: Flags [.], seq 1177:2637, ack 1511, win 8212, length 1460: HTTP: POST /blsAdministration/AdministrationService.asmx HTTP/1.1
17:04:18.791520 Port9, IN: ethertype IPv4, IP 172.17.2.11.52580 > 172.17.1.11.8080: Flags [.], seq 2637:4097, ack 1511, win 8212, length 1460: HTTP
17:04:18.791520 LAG_DSW, IN: ethertype IPv4, IP 172.17.2.11.52580 > 172.17.1.11.8080: Flags [.], seq 2637:4097, ack 1511, win 8212, length 1460: HTTP
17:04:18.791649 Port9, IN: ethertype IPv4, IP 172.17.2.11.52580 > 172.17.1.11.8080: Flags [P.], seq 5338:6272, ack 1511, win 8212, length 934: HTTP
17:04:18.791649 LAG_DSW, IN: ethertype IPv4, IP 172.17.2.11.52580 > 172.17.1.11.8080: Flags [P.], seq 5338:6272, ack 1511, win 8212, length 934: HTTP
17:04:18.791649 LAG_DSW.102, IN: IP 172.17.2.11.52580 > 172.17.1.11.8080: Flags [P.], seq 5338:6272, ack 1511, win 8212, length 934: HTTP
17:04:18.791657 LAG_DSW.101, OUT: IP 172.17.2.11.52580 > 172.17.1.11.8080: Flags [P.], seq 5338:6272, ack 1511, win 8212, length 934: HTTP
17:04:18.791658 LAG_DSW, OUT: ethertype IPv4, IP 172.17.2.11.52580 > 172.17.1.11.8080: Flags [P.], seq 5338:6272, ack 1511, win 8212, length 934: HTTP
17:04:18.791659 Port10, OUT: ethertype IPv4, IP 172.17.2.11.52580 > 172.17.1.11.8080: Flags [P.], seq 5338:6272, ack 1511, win 8212, length 934: HTTP
17:04:18.791778 Port9, IN: ethertype IPv4, IP 172.17.1.11.8080 > 172.17.2.11.52580: Flags [.], ack 5338, win 8212, length 0
17:04:18.791778 LAG_DSW, IN: ethertype IPv4, IP 172.17.1.11.8080 > 172.17.2.11.52580: Flags [.], ack 5338, win 8212, length 0
17:04:18.791778 LAG_DSW.101, IN: IP 172.17.1.11.8080 > 172.17.2.11.52580: Flags [.], ack 5338, win 8212, length 0
17:04:18.791784 LAG_DSW.102, OUT: IP 172.17.1.11.8080 > 172.17.2.11.52580: Flags [.], ack 5338, win 8212, length 0
17:04:18.791785 LAG_DSW, OUT: ethertype IPv4, IP 172.17.1.11.8080 > 172.17.2.11.52580: Flags [.], ack 5338, win 8212, length 0
17:04:18.791786 Port10, OUT: ethertype IPv4, IP 172.17.1.11.8080 > 172.17.2.11.52580: Flags [.], ack 5338, win 8212, length 0
17:04:18.791779 Port9, IN: ethertype IPv4, IP 172.17.1.11.8080 > 172.17.2.11.52580: Flags [.], ack 6272, win 8208, length 0
17:04:18.791779 LAG_DSW, IN: ethertype IPv4, IP 172.17.1.11.8080 > 172.17.2.11.52580: Flags [.], ack 6272, win 8208, length 0
17:04:18.808504 Port9, IN: ethertype IPv4, IP 172.17.1.11.8080 > 172.17.2.11.52580: Flags [P.], seq 1511:2556, ack 6272, win 8208, length 1045: HTTP: HTTP/1.1 200 OK
17:04:18.808504 LAG_DSW, IN: ethertype IPv4, IP 172.17.1.11.8080 > 172.17.2.11.52580: Flags [P.], seq 1511:2556, ack 6272, win 8208, length 1045: HTTP: HTTP/1.1 200 OK
17:04:18.808504 LAG_DSW.101, IN: IP 172.17.1.11.8080 > 172.17.2.11.52580: Flags [P.], seq 1511:2556, ack 6272, win 8208, length 1045: HTTP: HTTP/1.1 200 OK
17:04:18.808511 LAG_DSW.102, OUT: IP 172.17.1.11.8080 > 172.17.2.11.52580: Flags [P.], seq 1511:2556, ack 6272, win 8208, length 1045: HTTP: HTTP/1.1 200 OK
17:04:18.808512 LAG_DSW, OUT: ethertype IPv4, IP 172.17.1.11.8080 > 172.17.2.11.52580: Flags [P.], seq 1511:2556, ack 6272, win 8208, length 1045: HTTP: HTTP/1.1 200 OK
17:04:18.808513 Port10, OUT: ethertype IPv4, IP 172.17.1.11.8080 > 172.17.2.11.52580: Flags [P.], seq 1511:2556, ack 6272, win 8208, length 1045: HTTP: HTTP/1.1 200 OK
17:04:18.810584 Port9, IN: ethertype IPv4, IP 172.17.2.11.52580 > 172.17.1.11.8080: Flags [P.], seq 6272:6514, ack 2556, win 8208, length 242: HTTP: POST /blsAdministration/AdministrationService.asmx HTTP/1.1
17:04:18.810584 LAG_DSW, IN: ethertype IPv4, IP 172.17.2.11.52580 > 172.17.1.11.8080: Flags [P.], seq 6272:6514, ack 2556, win 8208, length 242: HTTP: POST /blsAdministration/AdministrationService.asmx HTTP/1.1
17:04:18.810584 LAG_DSW.102, IN: IP 172.17.2.11.52580 > 172.17.1.11.8080: Flags [P.], seq 6272:6514, ack 2556, win 8208, length 242: HTTP: POST /blsAdministration/AdministrationService.asmx HTTP/1.1
17:04:18.810591 LAG_DSW.101, OUT: IP 172.17.2.11.52580 > 172.17.1.11.8080: Flags [P.], seq 6272:6514, ack 2556, win 8208, length 242: HTTP: POST /blsAdministration/AdministrationService.asmx HTTP/1.1
17:04:18.810592 LAG_DSW, OUT: ethertype IPv4, IP 172.17.2.11.52580 > 172.17.1.11.8080: Flags [P.], seq 6272:6514, ack 2556, win 8208, length 242: HTTP: POST /blsAdministration/AdministrationService.asmx HTTP/1.1
17:04:18.810592 Port10, OUT: ethertype IPv4, IP 172.17.2.11.52580 > 172.17.1.11.8080: Flags [P.], seq 6272:6514, ack 2556, win 8208, length 242: HTTP: POST /blsAdministration/AdministrationService.asmx HTTP/1.1
17:04:18.810712 Port9, IN: ethertype IPv4, IP 172.17.2.11.52580 > 172.17.1.11.8080: Flags [P.], seq 6514:7448, ack 2556, win 8208, length 934: HTTP
17:04:18.810712 LAG_DSW, IN: ethertype IPv4, IP 172.17.2.11.52580 > 172.17.1.11.8080: Flags [P.], seq 6514:7448, ack 2556, win 8208, length 934: HTTP
17:04:18.810712 LAG_DSW.102, IN: IP 172.17.2.11.52580 > 172.17.1.11.8080: Flags [P.], seq 6514:7448, ack 2556, win 8208, length 934: HTTP
17:04:18.810718 LAG_DSW.101, OUT: IP 172.17.2.11.52580 > 172.17.1.11.8080: Flags [P.], seq 6514:7448, ack 2556, win 8208, length 934: HTTP
17:04:18.810718 LAG_DSW, OUT: ethertype IPv4, IP 172.17.2.11.52580 > 172.17.1.11.8080: Flags [P.], seq 6514:7448, ack 2556, win 8208, length 934: HTTP
17:04:18.810719 Port10, OUT: ethertype IPv4, IP 172.17.2.11.52580 > 172.17.1.11.8080: Flags [P.], seq 6514:7448, ack 2556, win 8208, length 934: HTTP
17:04:18.810841 Port9, IN: ethertype IPv4, IP 172.17.1.11.8080 > 172.17.2.11.52580: Flags [.], ack 7448, win 8212, length 0
17:04:18.810841 LAG_DSW, IN: ethertype IPv4, IP 172.17.1.11.8080 > 172.17.2.11.52580: Flags [.], ack 7448, win 8212, length 0
17:04:18.810841 LAG_DSW.101, IN: IP 172.17.1.11.8080 > 172.17.2.11.52580: Flags [.], ack 7448, win 8212, length 0
17:04:18.810846 LAG_DSW.102, OUT: IP 172.17.1.11.8080 > 172.17.2.11.52580: Flags [.], ack 7448, win 8212, length 0
17:04:18.810847 LAG_DSW, OUT: ethertype IPv4, IP 172.17.1.11.8080 > 172.17.2.11.52580: Flags [.], ack 7448, win 8212, length 0
17:04:18.810847 Port10, OUT: ethertype IPv4, IP 172.17.1.11.8080 > 172.17.2.11.52580: Flags [.], ack 7448, win 8212, length 0
17:04:18.833897 Port9, IN: ethertype IPv4, IP 172.17.1.11.8080 > 172.17.2.11.52580: Flags [P.], seq 2556:3323, ack 7448, win 8212, length 767: HTTP: HTTP/1.1 200 OK
17:04:18.833897 LAG_DSW, IN: ethertype IPv4, IP 172.17.1.11.8080 > 172.17.2.11.52580: Flags [P.], seq 2556:3323, ack 7448, win 8212, length 767: HTTP: HTTP/1.1 200 OK
17:04:18.833897 LAG_DSW.101, IN: IP 172.17.1.11.8080 > 172.17.2.11.52580: Flags [P.], seq 2556:3323, ack 7448, win 8212, length 767: HTTP: HTTP/1.1 200 OK
17:04:18.833904 LAG_DSW.102, OUT: IP 172.17.1.11.8080 > 172.17.2.11.52580: Flags [P.], seq 2556:3323, ack 7448, win 8212, length 767: HTTP: HTTP/1.1 200 OK
17:04:18.833905 LAG_DSW, OUT: ethertype IPv4, IP 172.17.1.11.8080 > 172.17.2.11.52580: Flags [P.], seq 2556:3323, ack 7448, win 8212, length 767: HTTP: HTTP/1.1 200 OK
17:04:18.833907 Port10, OUT: ethertype IPv4, IP 172.17.1.11.8080 > 172.17.2.11.52580: Flags [P.], seq 2556:3323, ack 7448, win 8212, length 767: HTTP: HTTP/1.1 200 OK
... a lot of more lines, but I think it is irrelevant here

    The dropped-packet-capture doesn't show anything at the same time.

    I doublechecked the network basics many time, but I can not see any failure here.

    Do you have any idea how to log the asymetrical routing?

  • 0 in reply to AndreasHämmerle

    Do you have a proxy enabled on this connections?

    Because it looks like the firewall is dropping / resetting this connections.

    16:54:38.916071 LAG_DSW.101, OUT: IP 172.17.2.11.52472 > 172.17.1.11.8080: Flags [R.], seq 243, ack 1461, win 0, length 0
    16:54:38.916074 LAG_DSW, OUT: ethertype IPv4, IP 172.17.2.11.52472 > 172.17.1.11.8080: Flags [R.], seq 243, ack 1461, win 0, length 0
    16:54:38.916074 Port10, OUT: ethertype IPv4, IP 172.17.2.11.52472 > 172.17.1.11.8080: Flags [R.], seq 243, ack 1461, win 0, length 0
    16:54:38.916079 LAG_DSW.102, OUT: IP 172.17.1.11.8080 > 172.17.2.11.52472: Flags [R.], seq 1, ack 243, win 0, length 0
    16:54:38.916079 LAG_DSW, OUT: ethertype IPv4, IP 172.17.1.11.8080 > 172.17.2.11.52472: Flags [R.], seq 1, ack 243, win 0, length 0
    16:54:38.916080 Port10, OUT: ethertype IPv4, IP 172.17.1.11.8080 > 172.17.2.11.52472: Flags [R.], seq 1,

    Those RESET packets are send by the firewall, which means the firewall is resetting the traffic, which indicates a proxy enabled on this traffic. 

  • 0 in reply to LuCar Toni

    I found a second way how to get the application working:

    1. I disabled the bypass rules

    2. I created firewall rule #6

    3. I entered folowing command in console

    set ips ac_atp exception fwrules 6

    -> After that the application is working as expected.

    -> I dont think the problem is caused from asymmetrical routing issues any more.

    I have mad a capture on server, client and XG while bypass and IPS rules are disabled to recreate the failure while starting the application on the Client.

    Sophos XG packet capture filtered on Port 8080

    Server

    Client

    My question now is:

    - is there any sophos log possibility to trace such drops from Application Classification / ATP or is the firewall dropping the traffic silent at this place?

    - what is your opinion on that? Is this a XG specific problem (for example ATP false positive etc) or is this more likely an applicaiton problem?

  • 0 in reply to AndreasHämmerle

    Revert the change and check the conntrack of this connection (Conntrack -E | grep 8080) on advanced Shell.

    Then check if there is a redirect happening. Seems like the proxy (Awarrenhttp) is intercepting this application. Likely because Web is enabled? 

Reply Children
  • 0 in reply to LuCar Toni

    I reproduced the failure while bypass and ips settings are removed from console.

    XG430_WP02_SFOS 18.5.1 MR-1-Build326# conntrack -E | grep 8080
...
    [NEW] proto=tcp      proto-no=6 timeout=120 state=SYN_SENT orig-src=172.17.2.11 orig-dst=172.17.1.11 orig-sport=60022 orig-dport=8080 [UNREPLIED] reply-src=172.17.1.11 reply-dst=172.17.2.11 reply-sport=8080 reply-dport=60022 id=4148903936 masterid=0 devin=LAG_DSW.102 devout=LAG_DSW.101 nseid=16784848 ips=0 sslvpnid=0 webfltid=0 appfltid=0 icapid=0 policytype=1 fwid=6 natid=0 fw_action=1 bwid=0 appid=0 appcatid=0 hbappid=0 hbappcatid=0 dpioffload=0x1 sigoffload=0 inzone=12 outzone=11 devinindex=27 devoutindex=26 hb_src=0 hb_dst=0 flags0=0xa0000200020 flags1=0x10000800000 flagvalues=5,21,41,43,87,104 catid=0 user=0 luserid=0 usergp=0 hotspotuserid=0 hotspotid=0 dst_mac=c8:4f:86:fc:01:02 src_mac=00:50:56:bd:d9:6a startstamp=1636363431 microflow[0]=INVALID microflow[1]=INVALID hostrev[0]=0 hostrev[1]=0 ipspid=0 diffserv=0 loindex=26 tlsruleid=0 ips_nfqueue=0 sess_verdict=0 gwoff=0 cluster_node=0 current_state[0]=13661 current_state[1]=0 vlan_id=0 inmark=0x0 brinindex=0 sessionid=28523 sessionidrev=23757 session_update_rev=2 dnat_done=0 upclass=0:0 dnclass=0:0 pbrid_dir0=0 pbrid_dir1=0 nhop_id[0]=65535 nhop_id[1]=65535 nhop_rev[0]=0 nhop_rev[1]=0 conn_fp_id=NOT_OFFLOADED
 [UPDATE] proto=tcp      proto-no=6 timeout=60 state=SYN_RECV orig-src=172.17.2.11 orig-dst=172.17.1.11 orig-sport=60022 orig-dport=8080 reply-src=172.17.1.11 reply-dst=172.17.2.11 reply-sport=8080 reply-dport=60022 id=4148903936 masterid=0 devin=LAG_DSW.102 devout=LAG_DSW.101 nseid=16784848 ips=0 sslvpnid=0 webfltid=0 appfltid=0 icapid=0 policytype=1 fwid=6 natid=0 fw_action=1 bwid=0 appid=0 appcatid=0 hbappid=0 hbappcatid=0 dpioffload=0x1 sigoffload=0 inzone=12 outzone=11 devinindex=27 devoutindex=26 hb_src=0 hb_dst=0 flags0=0xa0000200020 flags1=0x10000800000 flagvalues=5,21,41,43,87,104 catid=0 user=0 luserid=0 usergp=0 hotspotuserid=0 hotspotid=0 dst_mac=c8:4f:86:fc:01:02 src_mac=00:50:56:bd:d9:6a startstamp=1636363431 microflow[0]=INVALID microflow[1]=INVALID hostrev[0]=0 hostrev[1]=0 ipspid=0 diffserv=0 loindex=26 tlsruleid=0 ips_nfqueue=0 sess_verdict=0 gwoff=0 cluster_node=0 current_state[0]=13661 current_state[1]=13661 vlan_id=0 inmark=0x0 brinindex=0 sessionid=28523 sessionidrev=23757 session_update_rev=2 dnat_done=0 upclass=0:0 dnclass=0:0 pbrid_dir0=0 pbrid_dir1=0 nhop_id[0]=65535 nhop_id[1]=65535 nhop_rev[0]=0 nhop_rev[1]=0 conn_fp_id=NOT_OFFLOADED
 [UPDATE] proto=tcp      proto-no=6 timeout=10800 state=ESTABLISHED orig-src=172.17.2.11 orig-dst=172.17.1.11 orig-sport=60022 orig-dport=8080 reply-src=172.17.1.11 reply-dst=172.17.2.11 reply-sport=8080 reply-dport=60022 [ASSURED] id=4148903936 masterid=0 devin=LAG_DSW.102 devout=LAG_DSW.101 nseid=16784848 ips=0 sslvpnid=0 webfltid=0 appfltid=0 icapid=0 policytype=1 fwid=6 natid=0 fw_action=1 bwid=0 appid=0 appcatid=0 hbappid=0 hbappcatid=0 dpioffload=0x1 sigoffload=0 inzone=12 outzone=11 devinindex=27 devoutindex=26 hb_src=0 hb_dst=0 flags0=0xa0000200020 flags1=0x10000800000 flagvalues=5,21,41,43,87,104 catid=0 user=0 luserid=0 usergp=0 hotspotuserid=0 hotspotid=0 dst_mac=c8:4f:86:fc:01:02 src_mac=00:50:56:bd:d9:6a startstamp=1636363431 microflow[0]=INVALID microflow[1]=INVALID hostrev[0]=0 hostrev[1]=0 ipspid=0 diffserv=0 loindex=26 tlsruleid=0 ips_nfqueue=0 sess_verdict=0 gwoff=0 cluster_node=0 current_state[0]=13661 current_state[1]=13661 vlan_id=0 inmark=0x0 brinindex=0 sessionid=28523 sessionidrev=23757 session_update_rev=2 dnat_done=0 upclass=0:0 dnclass=0:0 pbrid_dir0=0 pbrid_dir1=0 nhop_id[0]=65535 nhop_id[1]=65535 nhop_rev[0]=0 nhop_rev[1]=0 conn_fp_id=NOT_OFFLOADED
 [UPDATE] proto=tcp      proto-no=6 timeout=10 state=CLOSE orig-src=172.17.2.11 orig-dst=172.17.1.11 orig-sport=60022 orig-dport=8080 reply-src=172.17.1.11 reply-dst=172.17.2.11 reply-sport=8080 reply-dport=60022 [ASSURED] id=4148903936 masterid=0 devin=LAG_DSW.102 devout=LAG_DSW.101 nseid=16784848 ips=0 sslvpnid=0 webfltid=0 appfltid=0 icapid=0 policytype=1 fwid=6 natid=0 fw_action=1 bwid=0 appid=6 appcatid=3 hbappid=10162 hbappcatid=0 dpioffload=0x5 sigoffload=0 inzone=12 outzone=11 devinindex=27 devoutindex=26 hb_src=0 hb_dst=0 flags0=0xa0000200020 flags1=0x10000810000 flagvalues=5,21,41,43,80,87,104 catid=0 user=0 luserid=0 usergp=0 hotspotuserid=0 hotspotid=0 dst_mac=c8:4f:86:fc:01:02 src_mac=00:50:56:bd:d9:6a startstamp=1636363431 microflow[0]=INVALID microflow[1]=INVALID hostrev[0]=0 hostrev[1]=0 ipspid=0 diffserv=0 loindex=26 tlsruleid=0 ips_nfqueue=0 sess_verdict=0 gwoff=0 cluster_node=0 current_state[0]=13661 current_state[1]=13661 vlan_id=0 inmark=0x0 brinindex=0 sessionid=28523 sessionidrev=23757 session_update_rev=6 dnat_done=0 upclass=0:0 dnclass=0:0 pbrid_dir0=0 pbrid_dir1=0 nhop_id[0]=65535 nhop_id[1]=65535 nhop_rev[0]=0 nhop_rev[1]=0 conn_fp_id=NOT_OFFLOADED
[DESTROY] proto=tcp      proto-no=6 orig-src=172.17.2.11 orig-dst=172.17.1.11 orig-sport=59969 orig-dport=8080 packets=178 bytes=110323 reply-src=172.17.1.11 reply-dst=172.17.2.11 reply-sport=8080 reply-dport=59969 packets=385 bytes=375427 [ASSURED] id=3527022848 masterid=0 devin=LAG_DSW.102 devout=LAG_DSW.101 nseid=16784440 ips=0 sslvpnid=0 webfltid=0 appfltid=0 icapid=0 policytype=1 fwid=6 natid=0 fw_action=1 bwid=0 appid=10162 appcatid=0 hbappid=10162 hbappcatid=0 dpioffload=0x7 sigoffload=0 inzone=12 outzone=11 devinindex=27 devoutindex=26 hb_src=0 hb_dst=0 flags0=0x20000a0000200020 flags1=0x10004810000 flagvalues=5,21,41,43,61,80,87,90,104 catid=1022 user=0 luserid=0 usergp=0 hotspotuserid=0 hotspotid=0 dst_mac=c8:4f:86:fc:01:02 src_mac=00:50:56:bd:d9:6a startstamp=1636363404 microflow[0]=INVALID microflow[1]=INVALID hostrev[0]=0 hostrev[1]=0 ipspid=0 diffserv=0 loindex=26 tlsruleid=0 ips_nfqueue=2 sess_verdict=0 gwoff=0 cluster_node=0 current_state[0]=13661 current_state[1]=13661 vlan_id=0 inmark=0x0 brinindex=0 sessionid=7409 sessionidrev=32269 session_update_rev=12 dnat_done=0 upclass=0:0 dnclass=0:0 pbrid_dir0=0 pbrid_dir1=0 nhop_id[0]=65535 nhop_id[1]=65535 nhop_rev[0]=0 nhop_rev[1]=0 conn_fp_id=NOT_OFFLOADED
...

(I deleted unnecessary lines)

    I can not see any proxy redirections in that conntrack logs.

    On the Firewall Rule there is no Web enabled.

  • 0 in reply to AndreasHämmerle

    With all the tests we have done so far, for me it looks like that this ATP/AC module is dropping the traffic because once i create "set ips ac_atp exception fwrules 6" everything works fine.

    Can you confirm this? If not can you please explain why you think we should search the problem on an other place like asymmetrical routing issues because I dont understand this at the moment.

    Do you know if it is possible to log this drops from ATP/AC module or if these kind of drops are silent?

  • 0 in reply to AndreasHämmerle

    Do you have micro app enabled? 

    console> system application_classification show
    On
    console> system application_classification microapp-discovery
    off on show
    console> system application_classification microapp-discovery show
    off

  • 0 in reply to LuCar Toni

    No this is not enabled:

    console> system application_classification show
    On

    console> system application_classification microapp-discovery show
    off

  • 0 in reply to AndreasHämmerle

    Sorry to bother you again.

    Could you please answer me the question, if there is any possibility to log this drops from ATP/AC module or if these kind of drops are silent?

  • 0 in reply to AndreasHämmerle

    Its the atp.log or drop packet capture. If there are no drops, this is not dropped. 

  • 0 in reply to LuCar Toni

    where can I find atp.log?

    There is no atp.log in /log Folder

    XG430_WP02_SFOS 18.5.1 MR-1-Build326# cd /log/
XG430_WP02_SFOS 18.5.1 MR-1-Build326# ls
VPN.log                     catUpdateLog                dnsd.log                    garner.log                  migration.log               readobject.log              red-R20002F2VQCJR37.log     smtpd_panic.log             up2date_av.log
WINGc.log                   centralmanagement.log       dnsgrabber.log              garner.log.0                migrationhash.log           red                         red-R20002MHTCCCR28.log     snireport.log               validation.log
WINGc.log.0                 centralmanagement.log.0     dnsgrabber.log.0            ha_pair.log                 mrouting.log                red-A35019622135F65.log     red.log                     snmpd.log                   validationError.log
access_server.log           charon.log                  dropbear.log                ha_tunnel.log               msync.log                   red-A350199D5868BE5.log     redis                       sophos-central.log          validationError.log.0
apache.log                  charon.log.0                eacd.log                    hbtrust.log                 msync.log.0                 red-A3501B9B893500C.log     reportdb.log                sshd.log                    vhost.log
apache_access.log           chromebook-sso-backend.log  entity.log                  hbtrust.log.0               nSXLd                       red-A3501D2BEF22F74.log     reportmigration.log         sslvpn.log                  vpncertificate.log
apache_access.log.0         clientless_access.log       error_log.log               heartbeatd.log              nSXLd.log                   red-A3501DA8C271A54.log     reverseproxy.log            ssod.log                    warren.log
apiparser.log               confdbstatus.log            exim_mail_client.log        hostapd.log                 nasm.log                    red-A3501E4B83A55E1.log     reverseproxy.log.0          strongswan-monitor.log      wc_remote.log
app-feedback.log            crreportdb.log              firewall_rule.log           hotspotd.log                nat_rule.log                red-A3501E58921CF3D.log     ripd.log                    strongswan.log              webproxy.log
appcached.log               csc.log                     fqdnd.log                   httplogd.log                networkd.log                red-A3501E77570D8E8.log     sac-feedback.log            strongswan.log.0            wifiauth.log
applog.log                  csc.log.0                   fqdnd.log.0                 hwmon.log                   networkd.log.0              red-A3501F696540315.log     sandbox_reportd.log         sync.log                    xfrmi.log
applog.log.0                cschelper.log               fqdndebug.log               ips.log                     npu-startup.log.prev        red-A350232E7D3581D.log     sandboxd.log                sysinit.log                 xgs-healthmond.log
av.log                      csd.log                     ftpproxy.log                ipsec.log                   npu_syslog.log              red-A36020093C07EDC.log     sessiontbl.log              syslog-ng.log               xgs-host.log
avd.log                     ctasd.log                   fwcm-eventd.log             ipsec_conn                  ntpclient.log               red-R200018963CFXC8.log     sig_upgrade.log             syslog.log                  xgs-npu-fw.log
avd.log.0                   ctipd.log                   fwcm-eventd.log.0           ipsec_monitor.log           openvpn-status.log          red-R20001HKPXRMJE7.log     sigdb.log                   tlsreport.log               zebra.log
awarrenhttp.log             ctsyncd.log                 fwcm-heartbeatd.log         iview.log                   ospfd.log                   red-R20001T9YFQK700.log     sigmigration.log            tmclient.log
awarrenhttp_access.log      ddc.log                     fwcm-heartbeatd.log.0       iview.log.0                 pimd.log                    red-R20001YCCYYJR6D.log     skein.log                   tomcat.log
awarrensmtp.log             dgd.log                     fwcm-updaterd.log           l2tpd.log                   pktcapd.log                 red-R20001YJGKMDW95.log     smbnetfs.log                tomcat.log.0
awed.log                    dgd.log.0                   fwcm-updaterd.log.0         lcd.log                     postgres.log                red-R20001YJRF8T4CF.log     smtpd_error.log             u2d.log
bgpd.log                    dhcpd.log                   fwlog.log                   licensing.log               pptpvpn.log                 red-R200024FYJ9R403.log     smtpd_main.log              u2d.log.0
bwm.log                     dhcpd6.log                  fwmgmt.log                  mdev.log                    radvd.log                   red-R200029YG4GHCC8.log     smtpd_main.log.0            uma.log
XG430_WP02_SFOS 18.5.1 MR-1-Build326#

  • 0 in reply to LuCar Toni

    dropped packet capture does not show one line while reproducing the error.

    ips.log is filling up with some entries constantly, but I can not see any relationship to my problem because the entries are written every 20-30 sec regardless if I reproduce the error or not.

    1637221271.445212946 [12491/0xeb0000007485] [nsg_tcphold.c:315:process_event] Could not find session for key and unique_id.
1637221271.648529883 [12491/0xc11400003517] [nsg_tcphold.c:315:process_event] Could not find session for key and unique_id.
1637221281.576054732 [12492/0x4e4000008260] [nsg_tcphold.c:315:process_event] Could not find session for key and unique_id.
1637221296.315486715 [12491/0x73e700005f7a] [nsg_tcphold.c:315:process_event] Could not find session for key and unique_id.
1637221361.592918676 [12491/0xe1b6000013a8] [nsg_tcphold.c:315:process_event] Could not find session for key and unique_id.
1637221372.286165496 [12491/0xfbf00000a67f] [nsg_tcphold.c:315:process_event] Could not find session for key and unique_id.
1637221376.254997289 [12489/0x1a71000bf215] [nsg.c:1037:parser_context_req_begin_cb] Cannot parse pipelined request. Will offload traffic. (fsm: 1, paf: 0)
1637221380.264400346 [12488/0x3fd80003c4ec] [nsg_tcphold.c:315:process_event] Could not find session for key and unique_id.
1637221380.276489084 [12488/0xfe11000016f6] [nsg_tcphold.c:315:process_event] Could not find session for key and unique_id.
1637221456.394740671 [12491/0xd2da000009c7] [nsg.c:1407:parser_context_resp_eoh_cb] request_fsm_response_begin failed.
1637221457.111740905 [12489/0x135b000042cf] [nsg.c:1407:parser_context_resp_eoh_cb] request_fsm_response_begin failed.
1637221461.033688667 [12488/0x4850000de0ea] [nsg_tcphold.c:315:process_event] Could not find session for key and unique_id.
1637221464.094616417 [12491/0x7019000ddd82] [nsg.c:1407:parser_context_resp_eoh_cb] request_fsm_response_begin failed.
1637221475.293703382 [12491/0xa403000041aa] [nsg.c:1407:parser_context_resp_eoh_cb] request_fsm_response_begin failed.
1637221477.222272602 [12492/0x489e000dfdb8] [nsg.c:1407:parser_context_resp_eoh_cb] request_fsm_response_begin failed.
1637221518.070145981 [12492/0x652300000630] [nsg_tcphold.c:315:process_event] Could not find session for key and unique_id.
1637221561.813531376 [12491/0xcc0006c25b] [nsg_tcphold.c:315:process_event] Could not find session for key and unique_id.
1637221562.585277755 [12492/0x5f8000002c00] [nsg_tcphold.c:315:process_event] Could not find session for key and unique_id.
1637221580.948666411 [12491/0x15a500005097] [nsg_tcphold.c:315:process_event] Could not find session for key and unique_id.
1637221581.040441116 [12492/0xcb2500013e76] [nsg_tcphold.c:315:process_event] Could not find session for key and unique_id.
1637221613.689577477 [12492/0x4f9300001625] [nsg_tcphold.c:315:process_event] Could not find session for key and unique_id.
1637221662.830070946 [12492/0xa0de00008729] [nsg_tcphold.c:315:process_event] Could not find session for key and unique_id.
1637221722.365829812 [12488/0xcff100004238] [nsg.c:1037:parser_context_req_begin_cb] Cannot parse pipelined request. Will offload traffic. (fsm: 1, paf: 0)
1637221722.368846499 [12491/0x50a600007ba5] [nsg.c:1037:parser_context_req_begin_cb] Cannot parse pipelined request. Will offload traffic. (fsm: 1, paf: 0)
1637221722.431311168 [12489/0xcfbf0000423f] [nsg.c:1037:parser_context_req_begin_cb] Cannot parse pipelined request. Will offload traffic. (fsm: 1, paf: 0)
1637221722.432365908 [12489/0x7c1f00007051] [nsg_tcphold.c:315:process_event] Could not find session for key and unique_id.
1637221722.433895988 [12491/0x63a80000a747] [nsg.c:1037:parser_context_req_begin_cb] Cannot parse pipelined request. Will offload traffic. (fsm: 1, paf: 0)
1637221727.362595316 [12491/0x8d2000e47df] [nsg_tcphold.c:315:process_event] Could not find session for key and unique_id.
1637221828.959235528 [12488/0x109700000984] [nsg_tcphold.c:315:process_event] Could not find session for key and unique_id.
1637221828.991220647 [12492/0x9ef400006262] [nsg_tcphold.c:315:process_event] Could not find session for key and unique_id.
1637221834.266318346 [12492/0xf0b00000bd48] [nsg_tcphold.c:315:process_event] Could not find session for key and unique_id.
1637221834.277881430 [12491/0x31a6000347de] [nsg.c:1037:parser_context_req_begin_cb] Cannot parse pipelined request. Will offload traffic. (fsm: 1, paf: 0)
1637221834.278348722 [12491/0x15610000102c] [nsg.c:1037:parser_context_req_begin_cb] Cannot parse pipelined request. Will offload traffic. (fsm: 1, paf: 0)
1637221834.312279944 [12489/0x2166000347d7] [nsg_tcphold.c:315:process_event] Could not find session for key and unique_id.
1637221834.312504010 [12489/0x66e700004df7] [nsg_tcphold.c:315:process_event] Could not find session for key and unique_id.

    You said if it's not logged there it is not dropped.

    But why is the application working when the AC/ATP Exception is active and doesnt work when it is deactivated?

    This indicates that the firewall is dropping that traffic at some point, isnt it?

  • 0 in reply to AndreasHämmerle

    From my perspective, its not about dropping. It looks like the application is intercepted by the proxy. Which means, the connection is not dropped, instead intercepted. If its intercepted, likely the application got dropped by the client/server. 

    A drop would indicate a "retransmission multiple times". But you get from somebody a RST (reset). So somebody wants to kill the connection for what ever reason. 

    BTW: Why is your client getting a 401 unauthorized?