> I have been using an OpenBSD Firewall/NAT Router with ATT for almost 3 > years now and never had a problem. Comcast has just purchased ATT and > even though I haven't made the offical switch yet, my (3.2)firewall > stops working for several hours every now and then. The current stop has > been for about 24 hours.
Comcast is screwy. Check your /var/db/dhclient.leases. They used to set the renew field to a very long time away and just expire the lease every 12-24 hours. Last time I fought with it, it felt like their network setup wouldn't allow any IPs that didn't have a valid dhcp lease. That way you can't always be online without having to reboot every day, or you pay extra for the professional service with a "persistent IP". At one point, I had my dhclient renewing every few hours. Plus a little script to kill the previous dhclient and spawn a new one every time the gateway started. They would also relax the one IP per cablemodem filtering for a while after a DHCP reply. I don't think that happens anymore. .mike
