Bug 76356

Summary:	unclean module matches udp packets without chksum as being invalid
Product:	[Retired] Red Hat Linux	Reporter:	Need Real Name <andrei>
Component:	iptables	Assignee:	Thomas Woerner <twoerner>
Status:	CLOSED NOTABUG	QA Contact:	Ben Levenson <benl>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	8.0
Target Milestone:	---
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2004-08-16 16:11:08 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Need Real Name 2002-10-20 19:45:23 UTC

From Bugzilla Helper:
User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0; .NET CLR 
1.0.3705)

Description of problem:
the iptables that comes with all versions of RH (including 8.0) has a problem 
with the unclean module : unclean matches all udp packets that don't have the 
chksum field as being invalid (and from rfc... udp packets do NOT need to have 
the chksum)

Version-Release number of selected component (if applicable):


How reproducible:
Always

Steps to Reproduce:
1.set the iptables to log and drop all unclean packets
2.try to connect to wwws.sun.com (you can try to browse www.sun.com->downloads)
3.
	

Actual Results:  connection will timeout and in the logs you will see several 
lines that states that iptables droped several upd packets with chksum zero 

Expected Results:  to be able to connect to wwws.sun.com

Additional info:

there are several fixes for this bug, including that the team that created 
iptables released a patch

Comment 1 Thomas Woerner 2004-08-16 16:11:08 UTC

Please verify this with a newer version of Red Hat Enterprise Linux or
Fedora Core and reopen it against the new version if it still occurs.

Closing as "not a bug" for now.