erikmccaskey64 wrote: > it's a normal desktop machines iptables firewall: > > If i want to block udp on dport 80 on the output chain, then is this > enough? i want to only allow tcp on it! > iptables -P OUTPUT DROP > iptables -A OUTPUT -o $PUBIF --dport 80 -j ACCEPT > > or i need this rule? > iptables -P OUTPUT DROP > iptables -A OUTPUT -o $PUBIF -p tcp --dport 80 -j ACCEPT > > the second one is the good one? > You don't want to do that, if you block everything on OUTPUT things like DHCP, ARP, ICMP, etc, fail. You would need pages of ACCEPT rules. iptables -A OUTPUT -p tcp ! --dport 80 -j REJECT Would at least block only tcp, although I bet you will find that you want to do mail and such. You are rapidly entering deep waters, I fear, but it's your machine. -- Bill Davidsen <davidsen@xxxxxxx> "We have more to fear from the bungling of the incompetent than from the machinations of the wicked." - from Slashdot -- users mailing list users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines
