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0004279: snort and incoming emails - MantisBT Endian Bugtracker
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IDProjectCategoryView StatusDate SubmittedLast Update
0004279Endian FirewallIntrusion Preventionpublic2012-02-10 11:462012-02-24 11:59
Assigned To 
PlatformOSOS Version
Product Version2.5 
Target VersionFixed in Version 
Summary0004279: snort and incoming emails
DescriptionWhen snort is active (report only), transactions with email server delay 30+ seconds and some emails senders cannot connect, timeout for transaction? because snort make delay ?.

Shutting down snort, transaction time is 2-3 seconds and works fine.

Sorry for my bad English.
Additional InformationUsing for smtp test

Test 1 Snort ON
OK - resolves to xxxxxxxxxxxxxxxxx
 OK - Reverse DNS matches SMTP Banner
 0 seconds - Good on Connection time
 Not an open relay.

 37.674 seconds - Not good! on Transaction time

Test2 Snort OFF

 OK - resolves to xxxxxxxxxxxxxxxxx
 OK - Reverse DNS matches SMTP Banner
 0 seconds - Good on Connection time
 Not an open relay.
 3.042 seconds - Good on Transaction time
TagsNo tags attached.
Attached Files

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-  Notes
christian-endian (administrator)
2012-02-24 09:14

Have you tried disabling some snort rules? There are rules that are known to slow down traffic...
By disabling one ruleset after another you should be able to find out which are the rules that slow down your system.
elitug (reporter)
2012-02-24 11:59

Thanks for response, some rules has been disabled (including email rules)but same result.

Rules disabled:

No proxy smtp o pop3 enabled on endian.

Uplink: 2 mbits upload/download
Hardware: Intel e5200 2 cores + 1 gb ram + wd 320gb

- Issue History
Date Modified Username Field Change
2012-02-10 11:46 elitug New Issue
2012-02-24 09:14 christian-endian Note Added: 0007727
2012-02-24 09:14 christian-endian Status new => feedback
2012-02-24 11:59 elitug Note Added: 0007730

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