[pptp-server] Pushing pptpd through...

[Justin Kreger]

Are you setup to allow established, and related connections?

Justin Kreger, MCP MCSE CCNA
jkreger at earthling.2y.net jwkreger at uncg.edu jkreger at aristotle.wss.net


On Wed, 6 Jun 2001 ctooley at amoa.org wrote:

> 
> 
> 
> 
> I've got a gateway/router style firewall based on a 2.4 kernel.  I'm using
> IPTables (somewhat reluctantly) and need to push pptp traffic through to the
> NAT'd server.  Anyone got any good iptables based scripts to do that?  What I
> have currently keeps timing out:
> 
> #Allow pptpd connections (port 1723)
> /sbin/iptables -t nat -A PREROUTING -i $EXTINT -p TCP \
>         --sport $PUBLICPORTS --dport 1723 -j ACCEPT
> /sbin/iptables -t nat -A OUTPUT -o $EXTINT -p 47 -j ACCEPT
> /sbin/iptables -A OUTPUT -o $EXTINT -p 47 -j ACCEPT
> /sbin/iptables -A INPUT  -i $EXTINT -p 47 -j ACCEPT
> /sbin/iptables -A INPUT  -i ppp+ \
>         -s $LOCALNETWORK -d $LOCALNETWORK -j ACCEPT
> /sbin/iptables -A OUTPUT -o ppp+ \
>         -s $LOCALNETWORK -d $LOCALNETWORK -j ACCEPT
> echo "PPTP clients allowed"
> 
> # Allow inbound pptpd connections to PoPToP - forward to pptp server
> /sbin/iptables -t nat -A PREROUTING -i $EXTINT -p TCP --dport 1723 --sport
> $PUBLIC
> PORTS -j DNAT --to $POPTOPSERVER
> /sbin/iptables -t nat -A PREROUTING -i $EXTINT -p 47 -j DNAT --to $POPTOPSERVER
> /sbin/iptables -A FORWARD -p TCP --dport 1723 --sport 1723 -j ACCEPT
> /sbin/iptables -A FORWARD -p 47 -j ACCEPT
> echo "PPTPD Server connections allowed"
> 
> I'm pretty sure that there are some parts missing.  Any help will be
> appreciated.
> 
> Chris Tooley
> 
> 
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