[Snort-users] Snort-1.8.7 + snmp support

Chris Green cmg at ...1935...
Fri Jul 26 11:48:06 EDT 2002

"Schlottmann, Philipp, HO" <Philipp.Schlottmann at ...6359...> writes:

> Hi.
> I configured snort with mysql database output and snmp trap sending support.
> I only once force an event being triggered by using "nmap -sS someIP" and
> snort does produce an enormous neverending amount of SNMP traps (UDP). I
> checked it with tcpdump and grep'ed the community string. The SNMP traps
> themselves being again recognized by snort cause kind of an endless loop! My
> ACID console with underlying mysql snort db gets performance problems and so
> on.
> How comes that snort produces SNMP traps all the time just because of one
> triggered signature...and it never ends up with that?

Basically, its a problem of not using an out of band management

Short fix:

add this to your snort command line

not \( src  and udp and dst port 162 \)

where is the IP address of your sensor

> How can I fix this? Is there a way to tell snort not to recognize the snmp
> traps it produced itself or to produce less traps or at least end up within
> some time?
> Thanx a lot!
> Philipp Schlottmann
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Chris Green <cmg at ...1935...>
 "Not everyone holds these truths to be self-evident, so we've worked
                  up a proof of them as Appendix A." --  Paul Prescod

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