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Cannot ping firewall from Router

Tags:
  • LAN
  • Networking
  • Routers
  • IP
  • Cisco
  • Firewalls
Last response: in Networking
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March 13, 2014 11:44:23 AM

Here is the network setup:
Internet > M0n0wall Firewall > LAN > Cisco Router > WiFi Net
Firewall LAN IP: 172.16.40.23
Cisco Router LAN IP: 172.16.40.20
Cisco Router WiFi Net IP: 192.168.0.180

From the router I can successfully ping the firewall (172.16.40.23), but it uses 172.16.40.20 as the source.
If I do an extended ping from the Cisco router and specify the source IP address 192.168.0.180 it times out when pinging 172.16.40.23

From the Firewall if I ping 192.168.0.180 and the source is the LAN interface it works. I hav a static router on the firewall and from this it appears to be working.

Wondering why pings only work in one direction? I ma not blocking anything on the

Ultimately I am trying to give internet access to the WiFi network. I can ping websites from the cisco using 172.16.40.20 as the source address, if I use 192.168.0.180 as the source I get no response.

More about : ping firewall router

Best solution

March 13, 2014 11:57:49 AM

from my knowledge a good firewall will not allow any type of ping signal....that's what whole point of having a firewall, just immagine if someone was trying to ping your firewall to see if one even exhisted...not a good thing.....i cold be wrong
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March 14, 2014 8:26:02 AM

Thanks for the response.

I figured out the problem. On our firewall you need to specify if you have any secondary networks on a specific interface so that it expects that traffic. So in a sense you you are correct, but internally I would expect to be able to ping a firewall at least for troubleshooting purposes.
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