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Is there any chat client that would just let you connect to someone's computer directly? (provided they're also running the same client). I'm in a place where I can connect to their ip directly, but none of the chat clients work (restricted internet access).

Edit: I use Windows 7 and Ubuntu 10.04. Looking for something that preferably works across (at least) these two platforms.

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Since I have to guess what OS, I'm going to go with RSTS/E, but I'm not familiar with chat software for it. If, on the off chance that you're using Windows or OS X, here's a link to a video chat program (unfortunately it seems inactive) called SquidCam which I've used before. – Dennis Williamson Jan 18 '11 at 20:23
Use a standard SIP/H.323 client? – Zoredache Jan 18 '11 at 23:56
I don't think there's a huge market for this so I doubt something would have been developed to do such a job. I do like the idea though. (hint that I've added it to my future project list) – Ciaran Jul 12 '11 at 23:19

Linphone works okay on both of those platforms. I think what he was asking is about how some clients won't call directly like ekiga. Anyway, I KNOW that linphone will allow direct calls. Bear in mind NAT breaks SIP

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Set up an XMPP (jabber) server on one or both of the computers. Bear in mind that if you're behind a NAT router you'll need to forward some ports to get this (or anything like it, in fact) to work. Note that for voice/video you'll need an add-on to your client. A list of servers is here (I use ejabberd) and you can find clients everywhere.

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Originally answered to a different different question:
Secure PC-to-PC voice call without going through a server

Linphone should do the trick. It supports call encryption via ZRTP. NAT traversal is easy with it via specifying a STUN server (i.e. It's super easy to set up. However, as it is SIP based, you will need a SIP server to go through. Personally, I just use as my proxy.

However, you should be able to set up SIP Witch on both computers to allow direct peer-to-peer communication without any 3rd party servers. See, for example, their documentation on how to set up SIP Witch on Ubuntu and adapt the instructions to your distro. Here's a better description of how to set up SIP Witch for a home network.

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