Re: Confusion on Protocol Mismatch

[Ryan Jordan <ryan.jordan () sourcefire com>]

I haven't changed it since Snort 2.8.5.3, about a year ago.

James, that's an alert from the SSH preprocessor. It alerts in the
event of non-SSH traffic on an SSH port, or a mismatch where one end
uses SSH-1 and the other end uses SSH-2.

Check the traffic that caused the alert. If it looks like it shouldn't
have alerted, post the section of snort.conf that starts with
"preprocessor ssh:".

-Ryan

On Fri, Dec 10, 2010 at 10:30 AM, Weir, Jason <jason.weir () nhrs org> wrote:
> overnight I've seen a bunch of these as well did something change with
> 128-4?
>
> -J
>
> -----Original Message-----
> From: Lay, James [mailto:james.lay () wincofoods com]
> Sent: Friday, December 10, 2010 10:22 AM
> To: snort-users () lists sourceforge net
> Subject: Confusion on Protocol Mismatch
>
> Team,
>
>
>
> So…I’m confused on just where this is a protocol mismatch:
>
>
>
> 12/10-08:16:10.632806  [**] [128:4:1] (spp_ssh) Protocol mismatch [**]
> [Priority: 3] {TCP} 10.21.10.101:1180 -> 10.21.10.2:22
>
>
>
> Relevant conf entries:
>
>
>
> var SSH_SERVERS [10.21.0.9,10.21.10.2,10.21.10.8]
>
> portvar SSH_PORTS 22
>
>
>
> Thanks/Danke/Gracias
>
>
>
> James Lay
>
> IT Security Analyst
>
> WinCo Foods
>
> 208-672-2014 Office
>
> 208-559-1855 Cell
>
> 650 N Armstrong Pl.
>
> Boise, Idaho 83704
>
>
>
> _____________________________________________________________________________________________
>
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