I have 5 servers in the same network with IPS X.X.X.110 - 114. They are all connected to a switch. I am able to reach all 5 of them from outside(internet). However, I cant connect from servers 0 - servers 3. From Server 4 however, I can contact all other servers and vice versa.
I checked the route and it seems to be the same on all servers. Here is the entry for it:
default static.x.x.x 0.0.0.0 UG 0 0 0 eth0 x.x.x.96 static.x.x.x 255.255.255.224 UG 0 0 0 eth0 x.x.x.96 * 255.255.255.224 U 0 0 0 eth0
All of them are running Ubuntu 12.10 64-bit.