can someone please let me know what this crash means?

[Jason]

> Do you use IPv6 on this box, and in particular, TCP over IPv6?  Do you use 
> tcpdrop(8) to kill TCP connections?
no ipv6 at all.. and no, I havent used tcpdrop that I know of..

> 
> There appears to be one bug fix since the revision you're using relating 
> to tcpdrop(8) on TCP connections in the TIMEWAIT state that might result 
> in a panic like the one you're seeing.  The panic and trace look familiar, 
> but without the panic message it's hard to confirm.  If the machine has 
> not already been reset, you might try showing the message buffer in DDB, 
> which would have the effect of printing out the ring buffer that likely 
> contains the panic message.
sorry, I had to reboot already.. ;)
> 
> There have also been a number of fixes relating to raw sockets which may 
> also apply to ipdivert related configurations, but I'm not sure they could 
> lead to this particular panic easily.  This strikes me a a pcb/tcp race of 
> some sort.

I am running ipfw on this box and do have 
$fwcmd add divert natd all from any to any via fxp0


hmm, I guess its time to upgrade to 6.0?

Jason