[pptp-server] Big Problems with any poptop Version

[Justin Kreger]

Ok, I'm going to write a webpage on how to route between networks with
PPTP......

Anyway..... take the MTU and MRU on pppd to something like 736, a packet
can't be larger than 1500, both on a ppp link, and ethernet.

Justin Kreger, MCP MCSE CCNA
jkreger at earthling.2y.net jwkreger at uncg.edu jkreger at aristotle.wss.net


On Fri, 18 May 2001, robert wrote:

> If you can connect one client (and transmit fine), you might try having that 
> client act as a "router" and make your default gateway the other end of the 
> VPN connection.
> 
> On Friday 18 May 2001 08:17, Harald Scharf wrote:
> > hello to all,
> >
> > i have some very big problems with any version of PoToP.
> > The access from a single Client seems to be no probelm, but now
> > i have a client, that wants to connect a whole network to the central site,
> > wich runs poptop (1.0.1).
> > Because of cost reasons, the client put a Zyxel Prestige 312 ADSL Router
> > to the other site and put a Windows BDC behind the NAT Router (which
> > supports pptp of course).
> > The connection goes up without any problem, and any stateless protocol
> > seems to pass the VPN without any problems (Ping, DNS Query....).
> > But if want to establish a statefull (TCP) connection, the only thing i
> > get back
> > is the Escape Character, and the connection hangs. The same thing
> > happens on the Routers Character Console.
> >
> > I putted an ethernet sniffer to the network and examined the IP Packets ->
> > They are completely empty.
> >
> > OK, i canceled the Zyxel Router and used the Micro$oft RRAS (Steelhead)
> > Multi Protokoll Router on the BDC.
> > Again, the connection goes up, and (ooh look, the same Configuration)
> > i can send Data over the VPN link (with TCP, ICMP, UDP....  :-),
> > but when i try to transfer a bigger amount of data i get a :
> >
> > not enough space tp encrypt packet : 1504<1504+4
> >
> > and the connection hangs.
> >
> > I tried several other solutions with non poptop Clients at the Router
> > Side, and
> > it ever failed very hard. (No Connections, Encrypting Problems,
> > Decrypting Problems....)
> >
> > Please Help!
> > Any idea whats happening ?
> >
> >
> > regards
> >
> > Harald Scharf
> > -------------
> >
> >
> > Again, the Connection
> >
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