While Shareaza was running I utilized one of the websites where one can test the connection. The log indicated the following:
Data dump: v1.12 (+AA),to=5,ipf=no,ip=207.245.xxx.xx,proxy=,port=6346,lang=en,el=0,php=5.3.10-pl0-gentoo
Start connection test for TCP...
Attempt to connect to 184.108.40.206 on port 6346.
socket_connect() failed, error 115: Operation now in progress.
(Ignore the previous error reason, it's a timeout instead.)
Done, return code: 'TIMEOUT'.
Start connection test for UDP...
Attempt to bind to INADDR_ANY on any port.
Send /JCT: 3x12 bytes: GND\002sq\001\001\020JCT
No proper answer received.
Done, return code: 'NOTHING'.
The IP address is not the one that I have been assigned. The test was run several times from more than one site. Initially I thought that it may have been a problem with my firewall but allowing all traffic, as well as fully disabling it, had no positive results.