Linux firewall, Win XP pptp problem

Hello,

I have a linux firewall in place (RH 9.0 running iptables). Behind
that firewall are two XP workstations that connect to two different
Microsoft PPTP or POPTOP server depending upon the task. When the
XP's are connected directly to the DSL line behind a Caymen 3546 ADSL
router they can connect just fine. When behind the Linux firewall
they fail. Firewall is set currently to NAT the users behind the
wall.

I have loaded the following:
/sbin/modprobe ipt_LOG
/sbin/modprobe ip_gre
/sbin/modprobe ipt_MASQUERADE
/sbin/modprobe ip_conntrack
/sbin/modprobe ip_conntrack_ftp
/sbin/modprobe ip_conntrack_irc
/sbin/modprobe ip_nat_ftp


Am I missing something? Default rules on the firewall have to set to
ACCEPT for everything for testing.

Gary Smith

Gary Smith wrote:
> Hello,
>
> I have a linux firewall in place (RH 9.0 running iptables). Behind
> that firewall are two XP workstations that connect to two different
> Microsoft PPTP or POPTOP server depending upon the task. When the
> XP's are connected directly to the DSL line behind a Caymen 3546 ADSL
> router they can connect just fine. When behind the Linux firewall
> they fail. Firewall is set currently to NAT the users behind the
> wall.
>
> I have loaded the following:
> /sbin/modprobe ipt_LOG
> /sbin/modprobe ip_gre
> /sbin/modprobe ipt_MASQUERADE
> /sbin/modprobe ip_conntrack
> /sbin/modprobe ip_conntrack_ftp
> /sbin/modprobe ip_conntrack_irc
> /sbin/modprobe ip_nat_ftp
>
>
> Am I missing something? Default rules on the firewall have to set to
> ACCEPT for everything for testing.
>
> Gary Smith
in the iptables configuration add the policy to accept protocol 47 (GRE).

bye
peppe