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 <
thierry@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
<div dir="ltr"><div>Thanks for good point - nf_conntrack_helper was disabled by default and it is difference between jessie and stretch</div>When I enable it - pptp from local network is working:<br><br>echo 1 > /proc/sys/net/netfilter/nf_conntrack_
helper<br></div><div class="gmail_extra"><br><div class="gmail_quote">On Thu, Aug 10, 2017 at 2:59 PM, Thierry JAOUEN <span dir="ltr"><<a href="mailto:
thierry@tjaouen.fr" target="_blank">
thierry@tjaouen.fr</a>></span> wrote:<br><blockquote class="
gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi,<br>
Maybe you need the "helper" module ?<br>
<<a href="
https://home.regit.org/netfilter-en/secure-use-of-helpers/" rel="noreferrer" target="_blank">
https://home.regit.org/netfil<wbr>ter-en/secure-use-of-helpers/</a>><br>
<<a href="
http://www.spinics.net/lists/netfilter/msg11791.html" rel="noreferrer" target="_blank">
http://www.spinics.net/lists/<wbr>netfilter/msg11791.html</a>><br>
... -m helper --helper pptp ...<br>
Bye<div class="HOEnZb"><div class="h5"><br>
Le 10/08/2017 à 12:04, Alexey Kurinnij a écrit :<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Hi. I have debian box with nat as gateway.<br>
With debbian jessie pptp from local network worked, with loaded kernel<br> module ip_nat_pptp.<br>
After upgrade to debian stretch - pptp not working any more, module<br> ip_nat_pptp loaded.<br>
Anyone have similar working configuration?<br>
# Generated by iptables-save v1.6.0 on Thu Aug 10 13:04:00 2017<br>
*filter<br>
:INPUT ACCEPT [0:0]<br>
:FORWARD ACCEPT [0:0]<br>
:OUTPUT ACCEPT [0:0]<br>
-A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT<br>
-A INPUT -p icmp -m icmp --icmp-type any -j ACCEPT<br>
-A INPUT -i lo -j ACCEPT<br>
-A INPUT -p tcp -m state --state NEW -m tcp --dport 22 -j ACCEPT<br>
-A INPUT -i eth0 -p udp -m state --state NEW -m udp --dport 67 -j ACCEPT<br>
-A INPUT -j DROP<br>
-A FORWARD -s <a href="
http://192.168.1.0/24" rel="noreferrer" target="_blank">192.168.1.0/24</a> ! -d <a href="
http://192.168.1.0/24" rel="noreferrer" target="_blank">192.168.1.0/24</a> -i eth0 -j ACCEPT<br>
-A FORWARD -d <a href="
http://192.168.1.0/24" rel="noreferrer" target="_blank">192.168.1.0/24</a> -i eth1 -j ACCEPT<br>
-A FORWARD -j DROP<br>
-A OUTPUT -j ACCEPT<br>
COMMIT<br>
# Completed on Thu Aug 10 13:04:00 2017<br>
# Generated by iptables-save v1.6.0 on Thu Aug 10 13:04:00 2017<br>
*nat<br>
:PREROUTING ACCEPT [8403:561775]<br>
:INPUT ACCEPT [4:194]<br>
:OUTPUT ACCEPT [295:18031]<br>
:POSTROUTING ACCEPT [295:18031]<br>
-A PREROUTING -i eth1 -p tcp -m tcp --dport 443 -j REDIRECT --to-ports 22<br> -A POSTROUTING -s <a href="
http://192.168.1.0/24" rel="noreferrer" target="_blank">192.168.1.0/24</a> -o eth1 -j MASQUERADE<br>
COMMIT<br>
# Completed on Thu Aug 10 13:04:00 2017<br>
</blockquote>
</div></div></blockquote></div><br></div>
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