[ssh] When the chinese attack
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Author:  Isaac [ Tue Jan 29, 2013 11:17 am ]
Post subject:  [ssh] When the chinese attack

I just watched my friend's ubuntu server get a brute-force style attack over ssh. They never got "Accepted" in the auth.log. They were using different IP addresses, all from China. I shut down the server.

We were just using a password for ssh, but now I'm going to switch to a proper ssh key. This is fun.

Author:  snoopy [ Thu Jan 31, 2013 6:46 am ]
Post subject:  Re: [ssh] When the chinese attack


I've been repeatedly pinged by Chinese IP addresses. Lock 'er down... I have mine set to only allow key authentication. Also consider moving the port...

Author:  Isaac [ Thu Jan 31, 2013 9:05 am ]
Post subject:  Re: [ssh] When the chinese attack

That sounds like a good idea. It was weird reading the log. They tried a random username and tried to see if I had an Oracle database installed.

Then they just opened and closed the session repeatedly, but without trying any passwords. I'm wondering if Ubuntu just black-listed them.

Author:  Jeff250 [ Thu Jan 31, 2013 9:50 pm ]
Post subject:  Re: [ssh] When the chinese attack

Passwords are fine *if* they are all strong, but the advantage of keys is that you don't have to worry about "choosing" one... the entropy pool does a good enough job. :P

Author:  Isaac [ Fri Feb 01, 2013 12:30 pm ]
Post subject:  Re: [ssh] When the chinese attack

Yeah, plus I believe it will decrease the tremendous lag I've been experiencing, from the local and public ip (across the city @ ~17 traces)

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