I have a problem I cant seem to comprehend, here's the thing: I want to have access to a LAN server on 192.168.100.32 from the firewall (192.168.1.100). This network is managed by eth0, and I can (obviously) access any host within that network without problems.
However, I am unable to access it from the WAN interface (192.168.0.254, that is, eth3). Here's the Nmap scan results for each interface.
$ nmap 192.168.100.32 -e eth0 // 443/tcp open https
$ nmap 192.168.100.32 -e eth3 // 443/tcp filtered https
IPTables: Chain PREROUTING DNAT tcp -- eth3 any anywhere anywhere tcp dpt:https to:192.168.100.32 Chain POSTROUTING MASQUERADE all -- any eth0 anywhere anywhere MASQUERADE all -- any eth3 anywhere anywhere
$ ip route
- 192.168.100.0/24 dev eth0 proto kernel scope link src 192.168.100.1
- 192.168.0.0/24 dev eth3 proto kernel scope link src 192.168.0.254
The weird thing is that 192.168.100.32 has access and is able to ping both 192.168.0.1 (gateway IP) and 192.168.0.254 (eth3, firewall interface)
I think it could be an ip route issue, but I don't know how to set it up correctly. Any help is appreciated!