It's probably got something to do with the Taiwan earthquake
Heaps of Streamyx users are having the same problems!!
http://www.gnutellaforums.com/showth...ghlight=taiwan http://www.webspaceworks.com/articles/news/70/ http://en.wikipedia.org/wiki/2006_He...communications
If the firewall icon has always shown in LW, chances are that it's an earthquake related problem with LW. Have you called TMNet to ask them what's up?
If you've only just started seeing the firewall icon, get back to us. But honestly, if this is due to cable damage then there's not much point fixing up the firewall problem if you won't be able to connect anyway...better to wait until the connection is fixed & then address that problem