I think, We should append this rule not insert, then /sbin/iptables -A OUTPUT -p tcp -dport 443 -j DROP another it block all request on 443 port. Tell me if i am wrong.. > So , in your case the following rules should work: > > ### First allow ### > /sbin/iptables -I OUTPUT -d gmail.com -p tcp --dport 443 -j ACCEPT > /sbin/iptables -I OUTPUT -d <GTALK IP > -p tcp --dport 443 -j ACCEPT > > ### Then Deny ### > /sbin/iptables -I OUTPUT -p tcp --dport 443 -j DROP -- redhat-list mailing list unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe https://www.redhat.com/mailman/listinfo/redhat-list