Traffic Shaping

Hi
We will use the monowall only as a WAN simulator without any firewall rules. We created any to any allow rules on the LAN and WAN interface. Always a packet which will be received by the WAN interface will be blocked. If I ping a client IP (10.185.52.1) in the LAN IP segment from the WAN segment, everytime the external IP address (10.185.8.160) of the monowall will get the answer:

ping 10.185.52.1 -t

Pinging 10.185.52.1 with 32 bytes of data:

Reply from 10.185.8.160: bytes=32 time=1ms TTL=125
Reply from 10.185.8.160: bytes=32 time=1ms TTL=125
Reply from 10.185.8.160: bytes=32 time=1ms TTL=125

What could that be?
Best regards
Oliver

Hello, this is my first post ever on this board. I'm no expert, but may I ask how and if you are using NAT? Thats what my guess is based on your description and ping results. Hopefully someone more knowledgeable can give you some suggestions because I am curious now.

No, we don't have enabled NAT. We will use the m0n0wall as a simple bridge without Firewall mechanisms.
It is very strange, if I create an allow any to any rule on both interfaces LAN and WAN only the outbound traffic won't be dropped. The inbound traffic will be stopped if I create the WAN rule or if I don't create it. If I create some dedicated rules for the inbound traffic depending on source ip and tcp port this works. But we will allow all inbound and outbound traffic.