Packet loss: how to troubleshoot?

[Matt Staroscik]

Lately I am getting a lot of messages like:

/kernel: vr0 - Packet lost

(I don't have the log in front of me so I may not have the exact syntax.)

My machine is a router/server, and vr0 is my internal interface, serving a
home LAN. I use ipnat and ipf for a firewall.

How can I go about troubleshooting this? I am unfamiliar with the really
deep networking voodoo.

Thanks in advance!

- matt s.