annoying brute force attack attempt using ssh

[Manuel Aróstegui]

El jue, 15-05-2008 a las 12:10 +0100, Scott van Looy escribió:
> May 15 12:03:52 novak sshd[21429]: Connection from 193.239.125.119 port 
> 53465
> May 15 12:03:54 novak sshd[21429]: Invalid user student from 
> 193.239.125.119
> May 15 12:03:54 novak sshd[21430]: input_userauth_request: invalid user 
> student
> May 15 12:03:56 novak sshd[21429]: Failed password for invalid user 
> student from 193.239.125.119 port 53465 ssh2
> May 15 12:03:56 novak sshd[21430]: Received disconnect from 
> 193.239.125.119: 11: Bye Bye
> May 15 12:03:56 novak sshd[21431]: Connection from 193.239.125.119 port 
> 53836
> May 15 12:03:57 novak sshd[21431]: Invalid user market from 
> 193.239.125.119
> May 15 12:03:57 novak sshd[21432]: input_userauth_request: invalid user 
> market
> May 15 12:04:00 novak sshd[21431]: Failed password for invalid user market 
> from 193.239.125.119 port 53836 ssh2
> May 15 12:04:00 novak sshd[21432]: Received disconnect from 
> 193.239.125.119: 11: Bye Bye
> May 15 12:04:00 novak sshd[21433]: Connection from 193.239.125.119 port 
> 54204
> May 15 12:04:01 novak sshd[21433]: Invalid user style from 193.239.125.119
> May 15 12:04:01 novak sshd[21434]: input_userauth_request: invalid user 
> style
> May 15 12:04:03 novak sshd[21433]: Failed password for invalid user style 
> from 193.239.125.119 port 54204 ssh2
> May 15 12:04:03 novak sshd[21434]: Received disconnect from 
> 193.239.125.119: 11: Bye Bye
> 
> 
> Lots and lots. Around 1 every 5 seconds.
> 
> So I ran
> iptables -A INPUT -s 193.239.125.119 -j DROP
> and was surprised to see them attacks continue
> Ran iptables -L just to make sure my rule was there and it was
> in the end had to use hosts.deny to block the IP
> 
> Anyone got any ideas why?

Use this:

iptables -I INPUT -s 193.239.125.119 -j DROP
That will stop the attacks

Manuel.


-- 
Manuel Arostegui Ramirez.

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