The 6346 test page has been down for about a week. You can try another port no. I think on an earlier page I listed a port that someone else used with success. Why not try a port in the 4XXX or 5XXX range. Port selection & proxy no. are not related per se. * Edit: Ports from 49152 - 65535 are open ports, worth trying.
(Static ip setting up is often described by modem-router instruction/support pages if that's required.)
Alternate methods & proxy types:
Another Insight proxy solution http proxies A Successful http Proxy Solution A reiteration: 'Late edit': Try also 1.
Tor alternative (click on link) A1 top technique & also
2.
HOW TO bypass Internet Censorship or
http://www.sanonofre.com/censorship.html