Mart Frauenlob a écrit : > On 24.01.2015 08:44, Jan Niggemann wrote: >> At least on my system it's sufficient that I load conntrack_pptp. With >> the following rules I can then create a pptp connection: >> -P INPUT DROP >> -P FORWARD DROP >> -P OUTPUT ACCEPT >> -A INPUT -i lo -j ACCEPT >> -A INPUT -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT >> I do not need to explicitly allow any gre traffic for the pptp vpn to work. > > Because it's accepted in the OUTPUT chain by the default policy? AND because nf_conntrack_pptp classifies incoming GRE packets as RELATED or ESTABLISHED, so they are accepted by the conntrack rule. -- To unsubscribe from this list: send the line "unsubscribe netfilter" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
