Why is my machine sending / receiving a lot of data to the Internet?

Hi All,
After a few hours of running, my machine starts receiving and sending data from and to the Internet at about 275kbps each way (the maximum speed that my Internet connection supports). Here is what I saw:
http://sprunge.us/STOT
Does anybody know what is happening on my machine? I'm really worried because the machines with ip addr of 111.*.*.* are from China and Taipei.
Please use a pastebin for HUGE dumps like this
Last edited by jasonwryan (2012-12-09 20:52:13)

Leonid.I wrote:@cfr:
What do you expect a firewall to do? You do realize that for a simple ssh and web server facing the internat you don't need a firewall, if there are no specific access requirements to the services, right? Besides, the box is NATed and the router provides a firewall.
Indeed. The fact that the box is behind a router emerged in response to my question/comment about the firewall. I never said that the router did not provide this. (Although routers do vary and anything being forwarded to the box is obviously not firewalled. Depending on the router, you might or might not be able to make the controls there as fine-grained as you could using iptables. (With the router I've got, you have very little fine-grained control so it would certainly make sense to run iptables if you wanted more control.)
I completely agree that blocking particular ips is pointless.
@hunterthomson:
Great lesson from microsoft: if it doesn't work -- reinstall, it's all because of an angry virus. Before assuming that apache/samba is hacked, perhaps it is wise to learn about configs first...
As far as I can tell, nobody has suggested that a virus is involved. The suggestion is that a rootkit is involved. That is hardly the same. If that's the case, then learning to configure things securely is clearly wise but reinstalling is likely to be the only way to be certain the system is trustworthy simply because the system is compromised in that case. Configuring the services correctly will not do any good if there's a rootkit inside.
This is not to say that forensics is not a good idea prior to reinstalling. I guess that will depend on a whole range of factors.

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