[pptp-server] Poptop and port 47

[Kenny Austin]

pptp doesn't use port 47, it uses protocol 47, ie GRE.
It is my understanding that a fair amount of companys and what
have you with firewalls in place are blocking GRE (many without
knowing it).  You already said that your isp blocks a lot of the
ports, therefore we know they have a fairly tight firewall and are
rather anal, so it is probably safe to say that they are blocking
the GRE protocol too.
I don't think (could be wrong) that where would be a way to setup
windows to use pptp without using GRE.

Kenny Austin
kennya at carlislefsp.com



----- Original Message -----
From: "kim oppalfens" <kimoppalfens at freegates.be>
To: <pptp-server at lists.schulte.org>
Sent: Thursday, August 31, 2000 6:22 AM
Subject: [pptp-server] Poptop and port 47


> Hi,
>
> I am running poptop versie 0.9.1 on a Linux Router Project based pc.
> The problem I have is when I try to connect from the outside, a pc
connected
> to the internet somewhere, I cannot connect. (He stops during the verify
> username
> and password.) If I do the same from my internal net I can connect without
> any problem.
>
> In my firewall rules I let 1723 and 47 through the firewall.
> Which brings me to the probable cause of my problem.
> My isp is blocking alot of ports under the 1024 boundary.
> These ports are denied for anyone not coming from my isp's network.
> So the 47 port is probably locked.
> Can anyone tell me what this port 47 is for?
> And if there is anyway to change the port to something above the 1024
> boundary.
> If so what should I do to tell the windows vpn clients to use the other
> port?
>
> Tnx in advance
> Kim Oppalfens
>
>
>
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