Thanks for good point - nf_conntrack_helper was disabled by default and it is difference between jessie and stretch When I enable it - pptp from local network is working:
echo 1 > /proc/sys/net/netfilter/nf_conntrack_helper On Thu, Aug 10, 2017 at 2:59 PM, Thierry JAOUEN <thie...@tjaouen.fr> wrote: > 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 >> >> >
