FC6 unable to get out of local network

[Paul Nash]

I've just seen a very wierd FC6 install.  The machine can reach anything on
the local network, but cannot get outside.  The IP, netmask, gateway are
all set correctly.  Outgoing packets get to the gateway, which forwards
them, but return packets are ignored.

I've tried turning iptables off; makes no difference.  Tcpdump does not
show any of the return packets either.  Tcpdump does not show ICMP packets
either, only TCP or UDP.

Traceroute gives "no response" indications in bursts, about 5 lines of "* *
*", then a 5-second wait, then five lines of "* * *".

Box is a new-ish 64-bit AMD, running 32-bit FC6.  Next move is to
re-install on an old P3 and see whet happens.

Anyone else seen anything like this?  Any ideas?

	paul
--
The Toronto Linux Users Group.      Meetings: http://gtalug.org/
TLUG requests: Linux topics, No HTML, wrap text below 80 columns
How to UNSUBSCRIBE: http://gtalug.org/wiki/Mailing_lists