I followed perfect server ubuntu 10.04 ispconfig 3 and I can't seem to connect to squirrelmail nor ISP Config 3. I port forwarded 80 and 8080 to no avail. Any clues?
Can you access ispconfig from within the local network? If yes, then either your router or your internet acces provider blocks port 80 and 8080. You should contact the support of your internet access provider then to verify if they block ports.