On Mon, Nov 28, 2005 at 10:46:38AM -0800, John Palmer wrote: > I am running FreeBSD 5.4 p8. I did a tcpdump -vv -i em0. The output > produced > a "bad udp cksum" with my DNS server. Does anyone know what it means? Or, > how I can > correct the problem?
If your NIC is doing checksum offload, tcpdump on the host won't see the right checksum, since it's only generated on the way out the door. Run tcpdump on another host on the network to verify whether it's correct on the wire. Kris
pgp94q11AM1tw.pgp
Description: PGP signature
