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19.1 Legacy Series / Re: OPNSense blocks internal LAN to LAN traffic
« on: February 04, 2019, 02:04:38 pm »
Hi,
Going to have to guess here, but...
WRT why is the firewall seeing it:
-) I'm going to assume you dont have some odd subnetting issue on your 10.0.0.10 server which is trying to route everything back to the clients.
-) From the info I see that the TCP Flags RA is set, see the following:
https://forum.opnsense.org/index.php?topic=4622.0
This suggests that either the firewall is seeing asymmetric traffic or was restarted. Seeing as both devices are internal I'm again leaning towards somehow your only seeing part of the conversation? Do you know if this might be a custom solution? Or somehow broadcasts (although it being TCP and looking at the port numbers I would be less inclined to go with that argument.
Going to have to guess here, but...
WRT why is the firewall seeing it:
-) I'm going to assume you dont have some odd subnetting issue on your 10.0.0.10 server which is trying to route everything back to the clients.
-) From the info I see that the TCP Flags RA is set, see the following:
https://forum.opnsense.org/index.php?topic=4622.0
This suggests that either the firewall is seeing asymmetric traffic or was restarted. Seeing as both devices are internal I'm again leaning towards somehow your only seeing part of the conversation? Do you know if this might be a custom solution? Or somehow broadcasts (although it being TCP and looking at the port numbers I would be less inclined to go with that argument.