[mdlug] iptables question

[David Relson]

Not a good day yesterday :-<  I did a "refresh" of my firewall rules
and lost NAT. For the past several years, I've been using Carl's
netmasq to setup firewall rules.  It has worked flawlessly -- until
yesterday.  Now, iptables is rejecting the following command:

   iptables -t nat -A masq_eth1 -o eth1 -j MASQUERADE

with message:

   iptables: Invalid argument

Without NAT, my LAN's connection to the internet is badly b0rked.  I
can't even google the message :-<

Anybody familiar with iptables, masquerading, etc??

Thanks.

David