conf/96741: IP forwarding halts

Keith Spencer keith at smmc.qld.edu.au
Wed May 3 23:20:21 UTC 2006


>Number:         96741
>Category:       conf
>Synopsis:       IP forwarding halts
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Wed May 03 23:20:14 GMT 2006
>Closed-Date:
>Last-Modified:
>Originator:     Keith Spencer
>Release:        FreeBSD 6.0 Release
>Organization:
St Margaret Mary's College
>Environment:
FreeBSD spencer.waccwireless.org 6.0-RELEASE FreeBSD 6.0-RELEASE #0 Thu Nov 3 09:36:13 UTC 2005    root at x64.samsco.home:/usr/obj/usr/src/sys/GENERIC  i386
>Description:
Configured this machine (replicated problem on another identical machine) as a gateway in rc.conf. Included IPNat.
Machine forwarded packets fine for 2 weeks.
Used ifconfig command to adjust wi0 device settings adn machine suddenly stopped forwarding packets out.
Local machine gateway routes were fine.
local machine continued to access outside network no problem.
Local LAN was able to access the gateway and all its services fine.
Gateway would not forward though.
IPNAT was checked and restarted.
Machine was rebooted.
The net.ipv4.forwarding environment variable seemed to have reset to 0

>How-To-Repeat:

>Fix:
Inserting an entry into sysctl.conf fixes the problem.
>Release-Note:
>Audit-Trail:
>Unformatted:


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