> I have a personal laptop running Debian sitting behind a linksys > future-shop-bought router that nicely provides me with DHCP services > at boot. My only concern at the moment is having iptables as a basic > firewall that can block/accept all incoming and outgoing packets from > my untrustworthy router. > > Starting out to experiment, I wanted to block all incoming packets: > > iptables -P INPUT DROP > > Then, I wanted to undo my changes: > > iptables -P INPUT ACCEPT > > Why is it that now I can't access the internet? I can access my router We don't know. Show us the output of "iptables -nvL". > at 192.168.1.1 and my other system at 192.168.1.100 but everythign > else is just shut down. Checking my router setup turns out that it > assigned only one DHCP client, and my system is gone from its list. What does "ifconfig" say ? Maybe you have to renew your DHCP lease. Perhaps the router doesn't accept your IP if it's not in it's list. > Is there something about the internal workings of iptables I should > know, or is this meant for the Debian, or general Linux help mailing > list?? I attempted restarting my networking scripts but it failed on > DHCP init. Unless you received an error when executing the commands above, there should be no problem. Maybe it's something with the router ; there's not too much troubleshooting information. Gr, Rob
