Proxy Servers

Greebo · Posted: Wed Sep 25, 2002 6:27 am Post subject: Proxy Servers

Which clever boffin wants to have a go at explaining these to me?
Never used or come across them before, no idea what they are, what they do.

If (can?) I set one up on my computer would it help bypass this bloody firewall I'm having trouble with?
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hoaxie · Posted: Wed Sep 25, 2002 6:31 am Post subject:

Firewall in your router? OS? Installed firewall?

You can use port triggereing to allow data flow for TFC, FTPing, faxing, etc.
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Greebo · Posted: Wed Sep 25, 2002 6:39 am Post subject:

Sorry will explain further
The firewall was set up by the university to stop file sharing programs (kazaa and suchlikes) - which is fine
Unfortunately they've also blocked gaming ports. (27015-27020 usually)
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MunkeyEye · Posted: Wed Sep 25, 2002 7:17 am Post subject:

`RaphX · Registered User Joined: 24 Mar 2002 Posts: 1556

I think it's more to do with connecting to outside networks and servers, rather than ports (correct me because I'm wrong). Some IMs are disabled, or have file-transfers disabled, while I believe mIRC is also disabled. But they all work through Trillian (except Y!, but noone uses that anyway). Downloads through FTP are also restricted, I believe.

This is what appears on the St. Andrews site (http://www.st-and.ac.uk/ITS/policies/netres.html)

Greebo · Posted: Wed Sep 25, 2002 8:52 am Post subject:

Oh yeah, Raphx is in the same situation

Mirc works fine as do most IM messenging programs (even if they do have to be done thru ICQ) FTP to my knowledge is fine (at least to connect to some - tried connecting to a download wwiionline thing and it worked)

btw I'm email them asking them if they could open ports 27015-27020 as they're gaming ports (for most games) but no reply received yet.
Figured if I don't ask I'll never know but I don't expect them to say yes.
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(+)ASSASSIN(+) · Posted: Wed Sep 25, 2002 1:12 pm Post subject:

ok heres a really generic explanation of a proxy server:

A = your machine

B = Proxy server

C = 3rd party machine (web server, application server etc.)

When computer A connects to a network or the internet it is assigned an IP address, which is how your computer is known on the network (in this case the network being the internet) When you go to any web page or log into any server that computer gets your IP address so it knows who you are. Now when you try to go to an internet site or whatever your computer tries to find the quickest available route at that time, and it may bounce across several different servers and internet networks before it reaches it destination. what a proxy server is, is a machine on the net that has an IP address assigned to it. if you set up computer A to Connect to computer B, you can effectively route through that machine to the rest of the internet, and other servers will know you as the IP of computer B instead of your own. Now if you wanted to try to use the proxy, what you would need to do is set up the proxy on the outside of the firewall and set up the game server etc to run on that proxy server. that way you can set up the proxy to receive your connection from a port that is not blocked by your firewall, for instance if you find that port 700 is not blocked by the firewall you can try to connect to the proxy using that port so you can get to it and then run the game server normally as you would if there was no firewall in the way. Like I said this is a really generic definetion and hopefully its not too simplistic or confusing, if someone can elaborate on the points I missed or messed up Please do so.

FYI how you would set it all up I have absolutly no Idea as im not familiar with Half-Life enough to help there . Hope this helps you somewhat
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Dahak · Posted: Wed Sep 25, 2002 1:52 pm Post subject:

maybe this'll help. i *think* you connect to this proxy using a different port, and the proxy will "bind" 27015 to a different port. However, you'd probably have to run this program outside the school's network.

http://www.planethalflife.com/hlproxy/

Greebo · Posted: Wed Sep 25, 2002 2:11 pm Post subject:

Thanks for the replies - I'm already setting up a program called TCP relay with a friend so halflife ain't a problem, just takes time
it's other games that are the problem, but we'll get there eventually
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ProudWhiteTrash · Posted: Thu Sep 26, 2002 5:30 am Post subject:

http://www.planethalflife.com/features/techcorner/mailbag/tcprelay_a.shtm

That might help with TCP relay.