can someone tell me more about this ip address?

Sure, no prob. I use a bunch of different tools, but here's what I did for this one in particular.

I first went to http://www.mxtoolbox.com/SuperTool.aspx - this can be used to find spam servers in particular & also a few other useful tidbits.

If you do a lookup, you get a response from wicam.com (which is the ISP that owns this address, and they're in Cambodia), but no other useful info. So next, I went to the blacklist tool to do a check. It DOES show up on a number of blacklists - this can mean that it's a zombie machine or an infected website, but by far the most common reason for this is that spam comes/has come from this address. So next to a port scan, which can show if a particular service is running. There's no response from SMTP, which means (at least currently), the machine is NOT a mail server.

However, scanning through http://www.projecthoneypot.org/ip_202.79.31.202 we clearly see spam being sent, but at a VERY low frequency (only about 1300 messages over 2 years). This points to a strong possibility that this machine is just being used as a relay or a proxy. If it were a relay, however, the number of messages would be much higher. Spam blasts typically number in the 6 or 7 figures, and not nearly that many messages have been detected from this address, so my guess would be a proxy.

Further, http://www.proxybridge.com/proxy/id758732 has listed proxy servers from WiCAM in the past - not this IP in particular, but there could be ranges that change on a periodic basis.

So nothing that's 100% concrete, but based on what I saw (and the location of the address) I'd be pretty confident in guessing that this is being used / has been used as a proxy server.