Hi all,
first of all, thanks to everybody who answered (and is still posting
answers) to my
previous question about the FW-1 bug.
Now I would like to know how the PPTP (Microsoft's implementation of VPNs)
behaves,
I mean, which ports are used for authoritation and which for the tunnel data
itself (the
standard). I am using a VPN Server in order to allow our remote offices to
use intranet
services; they (at a certain country) use an ISP to make the "call" to our
server, we have
already twelve offices connected in this fashion but the last two have
found problems:
- The first case is clear, the ISP told us that it is forbidden to use this
protocol (here is
the question, which ports are they blocking to forbid the service? )
- The second, which I think that could had something to do with this, is as
follows:
When we make the call it seem out to reach the server (it is possible to
reach it
by other means) and just when it is suppoused to have verified
username&pass. it crashes
with the error message : " [...] the peer is not responding.]". They get
this message 90% of the
time they waste making calls every 60 seconds ... sometimes, without further
explanation, they
succeed in connecting.
Any idea? ... in that country it is quite a hard task to find someone at the
ISP(the one and only)
to give you an explanation ... this is the reason of the post ... Thanks in
advance.
/|||\
@ @
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Jacobo P�rez Lajo
�rea de Sistemas y Comunicaciones
CISICRET
Tel: +34 91 3436132
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