What version of Avast! 5 are you running-not AIS I hope. What are the symptoms of the blockage? Do you get any messages? What are your NNTP rules in the Comodo Firewall? Anything in your Comodo Firewall logs? Port 119 is NNTP (unsecure newsreader) and is part of the Mail Shield in Avast!. What is your newsreader? What are its settings? What are your Avast! settings for NNTP? Do you scan newsgroup messages under expert settings? Under your SSL accounts, do you show your NNTP server as unencrypted? Are you using something like Newsleecher which is blocked by some ISPs for high traffic volume? If you want help, you need to tell us about your system and the problem.