Hello!
I have been using m0n0 for quite a while now as my company's router and firewall, but I have recently run into some trouble while changing thingsd in my network.
I have computers sitting behind the WAN interface, and others behind the LAN one. Even when I add "pass-all" rules on both those interfaces, (and reset states), m0n0 doesn't let traffic go from LAN to WAN in some very specific circumstances. These are resumed here:
LAN will ping WAN without any trouble
WAN will ping LAN, the LAN computers receive the PING request, send a PING response which is filtered by m0n0.
Same thing with SSH, etc.
I even see the firewall log saying it has actively filtered the TCP responses from LAN to WAN, though I have no "block" rules setup...
I am really puzzled by this behavior, and would appreciate your help!
Thank you
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Topic: Firewall not respecting rules?