Fedora Networking :: PPTP Server Set Up But Can't Connect?

May 8, 2010

I've got a FC PPTP server up and running but can't connect to it using VPN. I'm using NetworkManager but the connection fails each time. On the server, I'm seeing the following in the /var/log/messages:

Quote:

May 8 16:37:05 li99-23 pppd[2113]: Plugin /usr/lib/pptpd/pptpd-logwtmp.so is for pppd version 2.4.3, this is 2.4.4
May 8 16:37:05 li99-23 pptpd[2112]: GRE: read(fd=6,buffer=8059780,len=8196) from PTY failed: status = -1 error = Input/output error, usually caused by unexpected termination of pppd, check option syntax and pppd logs

[Code].....

Ive checked that the name,passwords all match, which they do. Has anybody seen this before ?

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I'm trying to connect to a Microsoft ISA PPTP server from my Linux box. The box I'm connecting from is itself a router. I have no problem connecting a Windows XP machine to the VPN via this machine. This is fine, but I would rather connect via the Linux machine, giving me far more advanced routing options (i.e. no to send every packet from the XP box completely unnecessarily via the PPTP tunnel). The Linux router is running Debian Lenny.

I've checked iptables. There were initially some issues. I've fixed those.

Invoking pppd from the console, I can see that authentication succeeds, but then some negotiation goes wrong and the server terminates the connection. Here's the output from pppd, with the more sensitive stuff removed:

Code:
<hostname>:~# pppd call <peer> nodetach debug
using channel 19
Using interface ppp0
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code....

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Code:
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[code]....

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I'm trying to get a pptp server up and running. The server starts just fine, but encounters errors when a client tries to connect.

Code:

CTRL: I wrote 32 bytes to the client.
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[code]....

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[Code]....

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[Code]...

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[Code]....

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Code:
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[Code]....

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Image of current settings in network manager:

Syslog:

Code:
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[Code].....

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