P2P behind Firewall?

[stocky]

Just wondering how to get data through a firewall, say if I wanted to use P2P or CS:S but am behind a firewall?

I have tried a http tunnel, but this doesn't seem to work properly.

It seems that it is possible to set up a proxy server at another location, which can feed the data to the computer behind the firewall - anyone know how on two XP based systems, or another way?

 

[maverik-sg1]

I am assuming you mean a hardware firewall stocky mate?

That being the case Boardy might be able to help.

Mav

 

[stocky]

I think it's one of those good ones where you can add code to block specific things, as MSN works okay, but that is spose to be quite difficult to block as it can switch ports or something...

 

[satman]

Stocky

Is the firewall built into a router EG speedtouch 540 and is it a NAT firewall ?.

I had a problem and found that i had to open ports in the NAT to allow the bit torrent software access to the internet.

 

[stocky]

Its actually a uni halls firewall, so I don't have control over it. I'm becoming confident the only way around would probably be a proxy server to re-send the data back to me.

PS: Happy Birthday! :dancing1: Have a good one

 

[boardy]

Ok, if you have the following - XP Windows Firewall AND a NAT Firewall (Hardware router) then disable to windows ones, and open the ports up on the NAT to allow traffic to get through. Windows firewall sometimes throws a wobbly if both of these are used. It's weird but it's something I've found on some of our systems in the field at work, not allowing FTP access if they are behind a NAT and XP Firewall.

If XP Firewall is disabled then you need to open up the ports on your router. The manual for whatever it is that your trying to allow access should be able to tell you what ports to open up. The web-interface for most routers will allow you to do this.

If your feeling even more devilish set your PC a static IP, use firewall software and open up the DMZ on the router to your IP only. This is dangerous though and would only recommend it if you have experience with how to hide the LAN to anything connecting to the DMZ area (i.e your PC).

Hope it helps, gimme a shout on MSN if u need help.

Boardy

 

[boardy]

Ok didn't see that. If your using uni-firewall then P2P ports are more than likely closed and locked down. Try changing the ports in the software to something else. I would say 80 or 8080 but then your allowing it on the HTTP port, and secondary HTTP port. Up to you how you do it, but as far as CS:S goes, I doubt you'll be able to work around that one.

Even if you use a proxy, you still have to get to the proxy using the uni-LAN so you acomplish booger all really.

Boardy

 

[stocky]

Cheers for the info

CS:S would be good If they found out they wouldn't be too pleased, but I do pay a lot for this connection!

I can access my FTP site without any probs, and I hear it is possible to run through that, although I probably don't have much of a limit as it's only a budget space.

All probably way too much hassle, just what they want ey?! 8)

 

[satman]

PS: Happy Birthday! :dancing1: Have a good one [/quote]

Thanks for the birthday wishes, went out last night and drank to much.

Realy feeling my age today.

 

[gorby]

It is possible, but tricky! The premise is you use software (or hardware if u have access to a cool router, the linksys wrt54g for example) to map friendly ports on the proxy / firewall to the ones your client needs. Another piece of software then redirects those ports again on the local host to the applications you want to work. The complication factor is really how well the uni have set up all their equipment, eg if you use http ports to route your data you could find that your packets start being stripped after a certain length etc due to only certain types of packet lengths being allowed through. They may even have a system that monitors TTL on all its clients and then notice the extra hop on all your packets So after you have mastered all these new technologies will you be able to play a nice lag free game of CS?.... probably not! If you end up using a program like httport then remember all ur packets are being routed through someone else's public access server ; so even if u end up with some nice bandwith the latency will probably be horrid IF, however you access to some dedicated webserver somewhere with fairly limited access who know what you could do...