i'm using that machine (it's Pentium 133, 64MB RAM, 2 ethernets) as 
NAT+ALTQ machine. it worked fine until network got larger (>120 machines).

fxp0 is PXE bootable LAN interface, ex0 is WAN interface

now it boots fine, works for some time (like 1-20 hours) then it 
self-reboots.

NAT bots logs through syslog to same machine that it's booting from.

sometimes before self reboot i'm getting message "NFS server is not 
responding" in logs, while (in the same time) ping shows everything is 
right. it still works for a long time with kernelspace, while userspace is 
frozen.


i did NO change on both machines and it started to behave like more and 
more often when network started to grow.

it's NetBSD 2.0 with custom kernel.


the only thing i see now but not before this problems is log messages like 
that:

Feb 12 09:14:27 gw254.hel /netbsd: ipf_nattable_max reduced to 23878

sometimes coming.


any ideas? can it be hardware failure?