Re: Can someone show an example how to force snort block ssh bruteforce?

[Joel Esler <jesler () sourcefire com>]

You'd probably want to run Snort in inline mode and looking into rate_filter:

http://manual.snort.org/node19.html


On Apr 20, 2012, at 4:11 AM, kay <kay.diam () gmail com> wrote:

> Hi everyone
>
> The only I have reached is alerting about SSH bruteforce:
> 04/20-11:57:27.155161 [**] [1:19559:2] BAD-TRAFFIC SSH brute force login attempt [**] [Classification: Misc activity] 
> [Priority: 3] {TCP} 172.16.1.1:50585 -> 172.16.1.2:22
>
> Here are the rules I used:
> alert tcp $EXTERNAL_NET any -> $HOME_NET 22 (msg:"BAD-TRAFFIC SSH brute force login attempt"; 
> flow:to_server,established; content:"SSH-"; depth:4; detection_filter:track by_src, count 5, seconds 60; 
> classtype:misc-activity; sid:19559; rev:2;)
> drop tcp $EXTERNAL_NET any -> $HOME_NET 22 (msg:"BAD-TRAFFIC SSH brute force login attempt"; 
> flow:to_server,established; content:"SSH-"; depth:4; detection_filter:track by_src, count 5, seconds 60; 
> classtype:misc-activity; sid:19559; rev:2;)
> ------------------------------------------------------------------------------
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------------------------------------------------------------------------------
For Developers, A Lot Can Happen In A Second.
Boundary is the first to Know...and Tell You.
Monitor Your Applications in Ultra-Fine Resolution. Try it FREE!
http://p.sf.net/sfu/Boundary-d2dvs2

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