There's many ways an isp or business such as a university can block or filter p2p. It may apply to speeds, or blocking of ports or programs or making certain p2p clients illegal (unauthorised) on their system.

Endless Splendors check thru the proxies options b/c there's mention of various ports you might be able to use there. Another way to find out if a port is blocked is to test various port no.'s
This simple test is for port 6346. Using your browser go here: http://www3.limewire.com:6346/ The page should say 'Your test worked!'. What happens when you go there? If you can't get the page loaded then port 6346 is blocked.
Another simple test. Keep LW open!!! & then, using your browser go here: http://www.grc.com/port_6346.htm (Press Probe this port button) Does it say open or closed? If closed then set the test for a different port number. ie: type in the port no. in the space next to the jump button then press jump. Then do the test of the new port no. (perhaps best if your firewall is temporarily disabled or test with it (a) on & (b) off, same applies for NAT modems/routers to test directly by (c) by-passing these devices & (d) also with them.) Another test is to use http://koti.mbnet.fi/gfactory/ctest/ where you can test various ports but likewise you need to have LW open at the time for some strange reason!!!

(If the result comes back as Stealth then: There are only two valid responses a port can give when it is scanned: "open" and "closed". A port is considered "stealth" when it doesn't respond to a request at all. All the GRC port scanner does is fire packets out at your ports. If your port answers back, it will be listed as either "open" or "closed". if your firewall prevents your computer from answering back to GRC's port scanner, the port will be listed as "stealth".)

Ok, hoop - jumped. What is stealth supposed to mean?
(Edit) ok, sorry. I think I get it NOW. All I had to do was actually notice your fine print and read it many times. Between that and me, well, it took some doing.....

After trying the link Port Authority, for Internet Port 6346*** i found that not only is port 6346 listed as stealth but every port I try is listed as stealth. Both my windows and norton firewall are disabled while doing this. I have also tried the link http://www3.limewire.com:6346/ and get 'Your test worked' so what does that mean. That my port is open but there is a firewall issue? Not more than a week and half ago I was able to connect without an issue but now I cannot get passed connecting to my network. I am not getting any error though it just won't connect to a host. I am on a school resnet but as I was able to connect earlier I am not sure it's an isp problem.

Hi Jerzey boy. Like you I have done all the test and came up with exaclty the same as you.

I even set the alarm for 3am this morning to see if I could use Limewire as another reader suggested but with no success. Guess they have got us by the b---s now. Big Brother and all that. Just who is really in control of your computer?

My mate is having the same trouble with Bt guess its the way its going now. I have given up just gutted I did not read the forum before I parted with my money but we live and learn.Take care guys Chester

Port Authority, for Internet Port 6346*** insists the port is open, but Limewire apparently disagrees, since it still can't connect.

http://www3.limewire.com:6346/ confirmed with 'Your test worked!', but still no connection.

Just as a matter of interest you guys. I was telling a mate of mine about all the problems were having as he also used Limewire but had not been on there for months so I asked if he could download a particular track for me and bet him he could not.
Guess what he had no trouble. Was with Freeserve and now Virgin Mmmm.

Regards Chester