Oh, good then. Is it necessary that I should access it only via 8333?
If they are simply blocking 8333 (unlikely, but possible), you might try this:
I tried telnet 178.79.170.173:28333 and it seems to connect, shows a blank screen with the flashing cursor. I forwarded port 28333 to my computer and I changed my bitcoin.conf to include:
port=28333
addnode=178.79.170.173:28333
You could also -connect=178.79.170.173:28333 but that would limit that to one connection.