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Firewall problem: Only works on a restart.

I have a minor mystery and I don't know how to debug it.

I have two computers in the house. Machine A has two NICS, one of which is hooked to the cable modem and sees the outside world. Also, Machine A implements the IPTABLES firewall with NAT. Machine B and Machine A's 2nd NIC are hooked up to a little hub. Ever since I upgraded to F10, I notice that Machine B can't see the outside world unless I restart the firewall. And just to make it interesting,

iptables -L > before
restart the firewall
iptables -L > after

diff before after
result is no difference

I'm wide open to a suggestion on how to fix this. And please don't tell me to restart the firewall in rc.local. ;-)


Time flies like the wind. Fruit flies like a banana. Stranger things have  .0.
happened but none stranger than this. Does your driver's license say Organ ..0
Donor?Black holes are where God divided by zero. Listen to me! We are all- 000
individuals! What if this weren't a hypothetical question?
steveo at syslang.net

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