[Snort-users] Alerts of the ICMP relationship with smtp connection?

Matt Jonkman matt at ...12231...
Tue May 24 13:21:13 EDT 2005

I've seen HPUX systems ping before they send email. But it usually shows
up as a large ICMP Packet sig. Unless you have that off, in which case
it'd likely trip one of those.

It's not unusual though, and generally not a threat. Just interesting.


Paulo wrote:
> Hi,
> I am using Snort version  Version 2.3.2 (Build 12).
> I have in my snort logs the alerts:
> 366 - ICMP Ping *nix
> 384 - ICMP Ping
> 368 - Ping BSDtype
> I investigated my others systems logs and in the time
> that this alert is recorded is the same that
> registered smtp connection in the maillog arquive from
> my postfix server.
> The source IP address in snort's log is equal the
> destination IP address in the maillog to smtp
> connection. 
> This alerts can to be generated by my mail server when
> it sends mails?
> This alerts is a false positive?
> Thanks by help
> __________________________________ 
> Discover Yahoo! 
> Have fun online with music videos, cool games, IM and more. Check it out! 
> http://discover.yahoo.com/online.html
> -------------------------------------------------------
> This SF.Net email is sponsored by Yahoo.
> Introducing Yahoo! Search Developer Network - Create apps using Yahoo!
> Search APIs Find out how you can build Yahoo! directly into your own
> Applications - visit http://developer.yahoo.net/?fr=offad-ysdn-ostg-q22005
> _______________________________________________
> Snort-users mailing list
> Snort-users at lists.sourceforge.net
> Go to this URL to change user options or unsubscribe:
> https://lists.sourceforge.net/lists/listinfo/snort-users
> Snort-users list archive:
> http://www.geocrawler.com/redir-sf.php3?list=snort-users

Matthew Jonkman, CISSP
Senior Security Engineer
765-429-0398 Direct Anytime
765-448-6847 Office
866-679-5177 24x7 NOC

NOTICE: The information contained in this email is confidential
and intended solely for the intended recipient. Any use,
distribution, transmittal or retransmittal of information
contained in this email by persons who are not intended
recipients may be a violation of law and is strictly prohibited.
If you are not the intended recipient, please contact the sender
and delete all copies.

More information about the Snort-users mailing list