Re: Capture Spam mail traffic using snort

[Jason <security () brvenik com>]

if those systems are in your network you could try a threshold rule


alert tcp !$SMTP_SERVERS any -> any 25 (msg"possible spammer"; 
content:"rcpt to\:"; nocase; flow:to_server, established; threshold:type 
both, track by_src, count 10, seconds 60; sid:1000000; rev:1;)

That rule should alert on any system that sends 10 mails in 60 seconds 
except those defined as SMTP_SERVERS.

lokesh.khanna () accelonafrica com wrote:
> Hi
>
> I am using snort on Redhat box.
>
> Is it possible to capture IP addresses using snort which are sending 
> Spam mails. If yes, how can I get signature?
>
>  
>
> Cordially,
>
> Lokesh


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