Hello:

This is my first post to the list and I would like to know if anyone have experienced or heard of what's happenning to my box.

I have a RH7.2 box as a firewall running an iptables script. The box has three NICs. One for a LAN, one for a DMZ, and one for the Internet connection running dhcpcd to get an IP from a cable modem (isp: Road Runner). Everything works fine but, after hours of innactivity I cannot access the Internet from the LAN. I can do everything else (chat, ftp, ssh, ping, traceroute, etc...) from the LAN to the outside world.

I was thinking it might be something with the expiration of the IP lease but I have a chain to take care of that:

iptables -A INPUT -i $INTERNET -d udp -s $DHCP_SERVER \ --sport 67 --dport 68 -j ACCEPT

iptables -A OUTPUT -o $INTERNET -d udp -d $DHCP_SERVER \ --dport 67 --sport 68 -j ACCEPT

These chains should do it but unfortunately in order for me to get the box back to normal I have to restart it and also restart the modem.

Thank you in advance for your help.

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