Christophe Dupre writes:
>
>
> Hi all,
> I've setup a firewall using Linux IP filtering rules, with kernel 2.0.36.
> Everything seems to work, except PPTP.
> I've allowed unrestricted traffic through the firewall to the PPTP server,
> port TCP/1723. But the firewall keeps blocking packets of type 47. Is there
> any way to allow those packets ? IPFWADM doesn't seem to know about those...
>
> Any help appreciated, I have some not-so-happy users...
>
PPTP uses the GRE tunneling protocol, it's some nasty protocol that's
not standard... big surprise eh?
There are some patches/addons for IPFWADM and IPChains that will
permit you to use PPTP... I cna't remember the website right off
though... sorry
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