recently add a firewall? or change any settings.. or new router?
might not hurt to make sure the ports are fowareded.. believe they are:
Code:
UDP 1200 (For the Friends service)
UDP 27000 to 27015 inclusive
TCP 27020 to 27050 inclusive
here some more info.. including a steam connection test...
http://support.steampowered.com/cgi-...php?p_faqid=11