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VPN Passthrough

Kman27

HI All,

I am new to Sophos UTM and am really impressed with the features and the controls I have on my home network but I am struggling outgoing VPN from home to work.

I have two VPN servers that I need to connect to from the home UTM.

1) Shrewsoft client which uses port 500

2) L2TP over IPSec setup on my Windows 10 machine. Port 1701

I have used the VPN protocols built in on the firewall but they dont work when I look on the firewall i can see green packets being passed but they nmever seem to connect am I missing something?  

IS the firewall traffic just one way?  Do I need something in case the VPN server needs to talk back to the machine?

I am sorry if the question sound silly but I am fairly new and I couldnt find anythign through searching through the forums.



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  • 0

    HI Kasum,

    Thanks for choosing Sophos.

    Packet filter logs show no drop in the connection and the packet is accepted. Can you post a tcpdump capture while connecting.

    Thanks

    Sachin Gurung
    Team Lead | Sophos Technical Support
    Knowledge Base  |  @SophosSupport  |  Video tutorials
    Remember to like a post.  If a post (on a question thread) solves your question use the 'This helped me' link.

  • 0 in reply to sachingurung
    14:35:37 Packet filter rule #7 UDP  

    192.168.1.164 : 500

    		→
    81.171.132.219 : 500
    		 
    len=558 ttl=63 tos=0x00 srcmac=3c:a9:f4:45:24:5c dstmac=bc:30:5b:b9:e7:36
    14:35:40 Default DROP UDP  
    192.168.1.164 : 65204
    		→
    94.245.121.251 : 3544
    		 
    len=89 ttl=127 tos=0x00 srcmac=3c:a9:f4:45:24:5c dstmac=bc:30:5b:b9:e7:36
    14:35:57 Default DROP UDP  
    192.168.1.164 : 59274
    		→
    74.125.133.120 : 443
    		 
    len=1378 ttl=127 tos=0x00 srcmac=3c:a9:f4:45:24:5c dstmac=bc:30:5b:b9:e7:36
    14:35:57 Default DROP UDP  
    192.168.1.164 : 59274
    		→
    74.125.133.120 : 443
    		 
    len=1378 ttl=127 tos=0x00 srcmac=3c:a9:f4:45:24:5c dstmac=bc:30:5b:b9:e7:36
    14:35:57 Default DROP UDP  
    192.168.1.164 : 59274
    		→
    74.125.133.120 : 443
    		 
    len=1378 ttl=127 tos=0x00 srcmac=3c:a9:f4:45:24:5c dstmac=bc:30:5b:b9:e7:36
    14:35:57 Default DROP UDP  
    192.168.1.164 : 59274
    		→
    74.125.133.120 : 443
    		 
    len=1378 ttl=127 tos=0x00 srcmac=3c:a9:f4:45:24:5c dstmac=bc:30:5b:b9:e7:36
    14:35:58 Default DROP UDP  
    192.168.1.164 : 59274
    		→
    74.125.133.120 : 443
    		 
    len=1378 ttl=127 tos=0x00 srcmac=3c:a9:f4:45:24:5c dstmac=bc:30:5b:b9:e7:36
    14:35:58 Default DROP UDP  
    192.168.1.164 : 59275
    		→
    74.125.133.120 : 443
    		 
    len=1378 ttl=127 tos=0x00 srcmac=3c:a9:f4:45:24:5c dstmac=bc:30:5b:b9:e7:36
    14:35:58 Default DROP UDP  
    192.168.1.164 : 59275
    		→
    74.125.133.120 : 443
    		 
    len=1378 ttl=127 tos=0x00 srcmac=3c:a9:f4:45:24:5c dstmac=bc:30:5b:b9:e7:36
    14:35:58 Default DROP UDP  
    192.168.1.164 : 59275
    		→
    74.125.133.120 : 443
    		 
    len=1378 ttl=127 tos=0x00 srcmac=3c:a9:f4:45:24:5c dstmac=bc:30:5b:b9:e7:36
    14:35:58 Default DROP UDP  
    192.168.1.164 : 59274
    		→
    74.125.133.120 : 443
    		 
    len=1378 ttl=127 tos=0x00 srcmac=3c:a9:f4:45:24:5c dstmac=bc:30:5b:b9:e7:36
    14:35:58 Default DROP UDP  
    192.168.1.164 : 59275
    		→
    74.125.133.120 : 443
    		 
    len=1378 ttl=127 tos=0x00 srcmac=3c:a9:f4:45:24:5c dstmac=bc:30:5b:b9:e7:36
    14:35:58 Default DROP UDP  
    192.168.1.164 : 61744
    		→
    66.102.1.94 : 443
    		 
    len=1378 ttl=127 tos=0x00 srcmac=3c:a9:f4:45:24:5c dstmac=bc:30:5b:b9:e7:36
    14:35:58 Default DROP UDP  
    192.168.1.164 : 59275
    		→
    74.125.133.120 : 443
    		 
    len=1378 ttl=127 tos=0x00 srcmac=3c:a9:f4:45:24:5c dstmac=bc:30:5b:b9:e7:36
    14:35:58 Default DROP UDP  
    192.168.1.164 : 61744
    		→
    66.102.1.94 : 443
    		 
    len=1378 ttl=127 tos=0x00 srcmac=3c:a9:f4:45:24:5c dstmac=bc:30:5b:b9:e7:36
    14:35:58 Default DROP UDP  
    192.168.1.164 : 61744
    		→
    66.102.1.94 : 443
    		 
    len=1378 ttl=127 tos=0x00 srcmac=3c:a9:f4:45:24:5c dstmac=bc:30:5b:b9:e7:36
    14:35:59 Default DROP UDP  
    192.168.1.164 : 59275
    		→
    74.125.133.120 : 443
    		 
    len=1378 ttl=127 tos=0x00 srcmac=3c:a9:f4:45:24:5c dstmac=bc:30:5b:b9:e7:36
    14:35:59 Default DROP UDP  
    192.168.1.164 : 59274
    		→
    74.125.133.120 : 443
    		 
    len=1378 ttl=127 tos=0x00 srcmac=3c:a9:f4:45:24:5c dstmac=bc:30:5b:b9:e7:36
    14:36:00 Default DROP UDP  
    192.168.1.164 : 61744
    		→
    66.102.1.94 : 443
    		 
    len=1378 ttl=127 tos=0x00 srcmac=3c:a9:f4:45:24:5c dstmac=bc:30:5b:b9:e7:36
    14:36:00 Default DROP UDP  
    192.168.1.164 : 59275
    		→
    74.125.133.120 : 443
    		 
    len=1378 ttl=127 tos=0x00 srcmac=3c:a9:f4:45:24:5c dstmac=bc:30:5b:b9:e7:36
    14:36:00 Default DROP UDP  
    192.168.1.164 : 61744
    		→
    66.102.1.94 : 443
    		 
    len=1378 ttl=127 tos=0x00 srcmac=3c:a9:f4:45:24:5c dstmac=bc:30:5b:b9:e7:36
    14:36:00 Default DROP UDP  
    192.168.1.164 : 59274
    		→
    74.125.133.120 : 443
    		 
    len=1378 ttl=127 tos=0x00 srcmac=3c:a9:f4:45:24:5c dstmac=bc:30:5b:b9:e7:36
    14:36:01 Default DROP UDP  
    192.168.1.164 : 59275
    		→
    74.125.133.120 : 443
    		 
    len=1378 ttl=127 tos=0x00 srcmac=3c:a9:f4:45:24:5c dstmac=bc:30:5b:b9:e7:36
    14:36:01 Default DROP UDP  
    192.168.1.164 : 59274
    		→
    74.125.133.120 : 443
    		 
    len=96 ttl=127 tos=0x00 srcmac=3c:a9:f4:45:24:5c dstmac=bc:30:5b:b9:e7:36
    14:36:03 Default DROP UDP  
    192.168.1.164 : 59275
    		→
    74.125.133.120 : 443
    		 
    len=96 ttl=127 tos=0x00 srcmac=3c:a9:f4:45:24:5c dstmac=bc:30:5b:b9:e7:36
    14:36:03 Default DROP UDP  
    192.168.1.164 : 61744
    		→
    66.102.1.94 : 443
    		 
    len=96 ttl=127 tos=0x00 srcmac=3c:a9:f4:45:24:5c dstmac=bc:30:5b:b9:e7:36
    14:36:10 Default DROP UDP  
    192.168.1.164 : 56899
    		→
    74.125.133.113 : 443
    		 
    len=1378 ttl=127 tos=0x00 srcmac=3c:a9:f4:45:24:5c dstmac=bc:30:5b:b9:e7:36
    14:36:10 Default DROP UDP  
    192.168.1.164 : 56899
    		→
    74.125.133.113 : 443
    		 
  • 0 in reply to Kman27

    Hi,

    Can you please post TCPdump output? Also, configure a new FW rule for a single system and place it on the TOP, define ANY services in the rule and try to connect to the VPN server.

    Thanks

    Sachin Gurung
    Team Lead | Sophos Technical Support
    Knowledge Base  |  @SophosSupport  |  Video tutorials
    Remember to like a post.  If a post (on a question thread) solves your question use the 'This helped me' link.

  • 0 in reply to sachingurung

    Sorry I went through my setup and I had default rules applied apart from the masquerading rule on the firewall - after doing that I am now connecting to both VPN's and my whatsapp calls are also working.

    Thanks for the help though.

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