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Firewall Rule with FQDN

I'm trying to build a business rule for incoming traffic from an fqdn resolved host. As you can see in the image, I have a rule that allows network traffic from two objects. One is an IP address object and the other is an FQDN host that resolves to the exact same IP when I hover over it or issue a DHCP lookup. However, if I set this rule with only the FQDN object in place on the Allowed Client Networks section, traffic is blocked from the host. If I make the rule to include the IP address object in the Allowed Client Network section, it works perfectly (obviously I can leave the FQDN object off completely in this case and it still works).

 

Is there something I'm missing? This type of rule worked perfectly under my UTM 9 setup using an FQDN.



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  • Hi Brian,

    Not sure, but create a DNS host entry to resolve the FQDN host on XG. Go to, System> Network > DNS> Static host entry.

    Take SSH to XG and go to option 4. Device console. Execute,

    tcpdump 'host xyz.com and port 8920

    and 

    tcpdump 'host x.x.x.x and port 8920

    Post the output.

  • Sorry, I've been out of town for work all week. I don't get any traffic when I use the FQDN, but I get some when using the IP address:

     

    console> tcpdump 'host cheetah.bbox.us and port 8920'

    tcpdump: Starting Packet Dump

    ^C

    0 packets captured

    15 packets received by filter

    0 packets dropped by kernel

     

     

    console> tcpdump 'host 71.10.176.3 and port 8920'

    tcpdump: Starting Packet Dump

    06:37:38.593918 Port1, IN: IP 172.16.15.38.8920 > 71.10.176.3.49944: Flags [.], ack 775090825, win 475, options [nop,nop,TS val 47328640 ecr 1065551048], length 0

    06:37:38.593922 Port1, OUT: IP 172.16.15.38.8920 > 71.10.176.3.49944: Flags [.], ack 1, win 475, options [nop,nop,TS val 47328640 ecr 1065551048], length 0

    ^C

    2 packets captured

    2 packets received by filter

    0 packets dropped by kernel

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  • Sorry, I've been out of town for work all week. I don't get any traffic when I use the FQDN, but I get some when using the IP address:

     

    console> tcpdump 'host cheetah.bbox.us and port 8920'

    tcpdump: Starting Packet Dump

    ^C

    0 packets captured

    15 packets received by filter

    0 packets dropped by kernel

     

     

    console> tcpdump 'host 71.10.176.3 and port 8920'

    tcpdump: Starting Packet Dump

    06:37:38.593918 Port1, IN: IP 172.16.15.38.8920 > 71.10.176.3.49944: Flags [.], ack 775090825, win 475, options [nop,nop,TS val 47328640 ecr 1065551048], length 0

    06:37:38.593922 Port1, OUT: IP 172.16.15.38.8920 > 71.10.176.3.49944: Flags [.], ack 1, win 475, options [nop,nop,TS val 47328640 ecr 1065551048], length 0

    ^C

    2 packets captured

    2 packets received by filter

    0 packets dropped by kernel

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