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Error 733 - the PPP control protocol for this network protocol is not available on the server. 

Event ID 20050 Ė - The user Domain\User connected to port VPNx has been disconnected
 

Q1:   I've configured w2003 server -> routing and remote access, using PPTP.   But when I try to connect from client I get error "TCP/IP CP reported error 733. A connection to the remote computer could not be completed. You might need to adjust protocols on this computer".   In the server system log is : The user "xxx" connected to port VPN4-127 has been disconnected because no network protocols were successfully  negotiated.(Event ID:20050).

Can you help me please??

A1: You may receive above errors if you configure Dial-in Media incorrectly.
These search result may help,

Troubleshooting Windows Remote Access connections Event ID 20050, 20189 and
20078. Symptoms:. 1. The remote access server does not accept a PPTP
connection. 2. Error 649 - Login failed: username, password, ...
     
www.chicagotech.net/VPN/rras1.htm

Event ID Troubleshooting Event ID 20050 - The user Domain\User connected to
port VPNx has been disconnected Event ID 20073 - There are no authentication
protocols available for use ...
     
www.chicagotech.net/wineventid.htm

Bob Lin, MS-MVP, MCSE & CNE
Networking, Internet, Routing, VPN Troubleshooting on
http://www.ChicagoTech.net
How to Setup Windows, Network, VPN & Remote Access on
http://www.HowToNetworking.com

Q2: Than you for your reply..

My problem has been solved by setting "Static address pool" and not DHCP in IP address assignment ... however I don't know why DHCP doesn't work, because I have installed DHCP services.

A2: Thank you for the update. Yes, if the VPN client canít receive a IP address from the DHCP, you may have this issue. If this is the case, you may want to setup IP Address Pool.

Bob Lin, MS-MVP, MCSE & CNE
Networking, Internet, Routing, VPN Troubleshooting on
http://www.ChicagoTech.net
How to Setup Windows, Network, VPN & Remote Access on
http://www.HowToNetworking.com

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