Which Linux distribution do you use on the web servers? Is eth0 the network interface of the web servers? Maybe it's eth1, eth2, etc. on your systems.
Have you tried with Debian Sarge? Because I wrote the tutorial for Sarge, so I don't know if it works for Etch.
What's the output of Code: netstat -tap and Code: ifconfig on the web servers? Also, any errors in the log files on the web servers?
Hi. I think the correct netmask of lo:0 did it: 255.255.255.255 I put the same netmask than the real-server-IP to lo:0. Tonight I restart the service and I will see.