Certain connections drop off after 10-30 seconds
First: thanks for reading!
I have an odd situation: I have two Alix based boxes - one old (pfsense 1.2) and one new (latest release). Both have been configured exactly the same. Well - same networking; same rules; same NAT. When I swap the new for the old - everything works exactly as expected - except one thing: I have another network behind PFS; it's behind a Cisco 5505. There is a machine there running a simple tcp proxy that is proxying specific ports out to the Internet (long story as to why this oddity). Under the old 1.2 PFS - everything is fine. When I switch the new PFS - connections from that box and ONLY that box start out ok, but drop off after a few seconds. Literally I can watch communications start; data transfer start and within 30 seconds or less - dead. Now - I have some more troubleshooting to do - need to get wireshark on there and see exactly what's happening - but I thought I'd put this up; in case someone knows what may be happening.
Thank you for your time and attention.
Asymmetric routing, probably.
System > Advanced, Firewall/NAT tab, check "Bypass firewall rules for traffic on the same interface"
Thank you for the reply!
Asymmetric routing… possible... there are two gateways to the network with the proxying machine.
However, none of the devices in question PFS/Cisco/Proxy are aware of the second G/W. So unless I am misunderstanding - how is this possible? The connection is like this: Outside<->PFS<->Cisco<->Proxy. PFS has a second G/W defined but for a different network.
Additionally - is there something different in the way 1.2 and 2.x process this traffic? As the 1.2 version works just fine.
EDIT: BTW - Initial testing suggests that this indeed is the solution. Will add a full reply when fully confirmed.