IP address banned from ubuntuforums? [closed]

They've undoubtedly banned it because somebody on the other end of it was spamming or performing other undesirable behaviour. You've got two choices:

  • Get a new IP. If you're on a dynamic allocation (which you probably are) rebooting the router might get you a fresh one.
  • Talk to the Forums Community Council, explain the situation and request they unblock the IP.

We're not the same people here so can't help you directly.