Hi, Maybe you need the "helper" module ?
<https://home.regit.org/netfilter-en/secure-use-of-helpers/> <http://www.spinics.net/lists/netfilter/msg11791.html> ... -m helper --helper pptp ... Bye Le 10/08/2017 à 12:04, Alexey Kurinnij a écrit :
Hi. I have debian box with nat as gateway. With debbian jessie pptp from local network worked, with loaded kernel module ip_nat_pptp. After upgrade to debian stretch - pptp not working any more, module ip_nat_pptp loaded. Anyone have similar working configuration? # Generated by iptables-save v1.6.0 on Thu Aug 10 13:04:00 2017 *filter :INPUT ACCEPT [0:0] :FORWARD ACCEPT [0:0] :OUTPUT ACCEPT [0:0] -A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT -A INPUT -p icmp -m icmp --icmp-type any -j ACCEPT -A INPUT -i lo -j ACCEPT -A INPUT -p tcp -m state --state NEW -m tcp --dport 22 -j ACCEPT -A INPUT -i eth0 -p udp -m state --state NEW -m udp --dport 67 -j ACCEPT -A INPUT -j DROP -A FORWARD -s 192.168.1.0/24 ! -d 192.168.1.0/24 -i eth0 -j ACCEPT -A FORWARD -d 192.168.1.0/24 -i eth1 -j ACCEPT -A FORWARD -j DROP -A OUTPUT -j ACCEPT COMMIT # Completed on Thu Aug 10 13:04:00 2017 # Generated by iptables-save v1.6.0 on Thu Aug 10 13:04:00 2017 *nat :PREROUTING ACCEPT [8403:561775] :INPUT ACCEPT [4:194] :OUTPUT ACCEPT [295:18031] :POSTROUTING ACCEPT [295:18031] -A PREROUTING -i eth1 -p tcp -m tcp --dport 443 -j REDIRECT --to-ports 22 -A POSTROUTING -s 192.168.1.0/24 -o eth1 -j MASQUERADE COMMIT # Completed on Thu Aug 10 13:04:00 2017
