Forum OpenACS Q&A: Response to OPENACS Access Problem (Help me to help myself!!)

Blatantly obvious would be if you had done this in your /home/aolserver/acs3-pg.tcl:

set hostname localhost
set address 127.0.0.1

In which case your Aolserver is hapily serving the loop back device instead of eth0 or something. Aolserver wants to be bound to a specific IP, it will not listen to all your network devices.