NAT broken in -CURRENT

Luigi Rizzo rizzo at
Sat Dec 26 21:13:23 UTC 2009

On Sat, Dec 26, 2009 at 03:25:38PM -0500, Joe Marcus Clarke wrote:
> I updated my -CURRENT box yesterday.  After a reboot, NAT no longer
> works.  That is, if I have natd running with ipfw diverting packets to
> it, the box is a big black hole.  No packets leave.  I do see all
> I have a feeling the new ipfw code merged ~ 11 days ago is the cause of
> the problem.  Thinking that perhaps the new modularity is causing this
> problem, I also added the following two options to my kernel:
> options	LIBALIAS
> They did not help.  I have not tried using a purely modular ipfw/NAT
> combination, but I will attempt that later today.  I didn't see anything
> obvious in UPDATING.  Any suggestions, or any recommendations for
> specific troubleshooting data to capture?  Thanks.

the changes were not expected to affect configuration or operation
so clearly i must have broken something in the reinjection process.
If you have a chance of looking at the ipfw counters (to see whether
packets are reinjected and where they end up) that would be helpful.
I'll try to run some tests here tomorrow or more likely on monday.


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