Snort mailing list archives
Re: SMTP Backscatter
From: Dave Corsello <snort-users () wintertreemedia com>
Date: Sun, 16 Feb 2014 09:54:51 -0500
Guys, thanks, but I don't need advice on setting up SMTP--at least not in this situation. Just looking for an answer to the following: Can Snort somehow: 1) detect an outgoing 450 4.1.1 error; and in response, 2) block all incoming SMTP traffic from the sender IP for a period of time? A 450 4.1.1 error means "recipient address rejected: unverified address: mailbox full or unavailable". In this case, I'm sending out 450 errors because messages are being addressed to random, invalid accounts on my domain. As was suggested, it might be best to just let SMTP continue to handle this. But I view it as an attack of sorts, and my preference would be to stop it as far out on my perimeter as possible. My apologies in advance if this question exposes ignorance of some Snort basics... ------------------------------------------------------------------------------ Android apps run on BlackBerry 10 Introducing the new BlackBerry 10.2.1 Runtime for Android apps. Now with support for Jelly Bean, Bluetooth, Mapview and more. Get your Android app in front of a whole new audience. Start now. http://pubads.g.doubleclick.net/gampad/clk?id=124407151&iu=/4140/ostg.clktrk _______________________________________________ Snort-users mailing list Snort-users () 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://sourceforge.net/mailarchive/forum.php?forum_name=snort-users Please visit http://blog.snort.org to stay current on all the latest Snort news!
Current thread:
- SMTP Backscatter Dave Corsello (Feb 14)
- Re: SMTP Backscatter Jason Haar (Feb 15)
- Re: SMTP Backscatter waldo kitty (Feb 15)
- Re: SMTP Backscatter Dave Corsello (Feb 16)
- Re: SMTP Backscatter waldo kitty (Feb 16)
- Re: SMTP Backscatter Jeff Kell (Feb 16)
- Re: SMTP Backscatter waldo kitty (Feb 16)
- Message not available
- Message not available
- Re: SMTP Backscatter Dave Corsello (Feb 18)
- Re: SMTP Backscatter waldo kitty (Feb 18)
- Re: SMTP Backscatter waldo kitty (Feb 15)
- Re: SMTP Backscatter Jason Haar (Feb 15)