[pptp-server] Accessing pptp over a Network behind a Firewall

[Hauser Marcel]

>> BUT !! I can't connect from everywhere else on the internet.
>> I know it looks like a firewall issue... but that thing doing NAT at
my
>> ISP isn't a firewall... it just does nat (allowing every kind of
>> traffic) !! 
>I think the problem is GRE (IP Protocoll 47), that isn't normally
natted.
>There are tools, that perform a kind of ping using gre-packets. I don't
>have an url, but using google, you should find a tool. Otherwise mail
your
>provider and ask, wether other ip-protocolls are natted.

So the actual data transfer is based on GRE, right ? (Because I can
authenticate successfully I guess) What is that "LCP ConfReq" anyway
(which doesn't get answered by the client) ?

Cheers Marcel