Home | Troubleshooting |  Quick Setup  |  Cisco How to  |  Data Recovery  |  Forums   | Blog | IT Exam Practice | Services  | About Us | Chicagotech MVP  | Search  | Contact Us  |               Select a Topic VPN How To Network How To Remote Access How To Windows How To Internet How To New Topics    Laptop for rent: $35 per day plus $10 for additional day

Error 781 - Encryption Failed

Symptom: When connecting to a VPN server, you may receive this Error 781: The encryption attempt failed because no valid certificate was found.

Resolution: 1. If your VPN client is trying to use L2TP/IPSec for the VPN connection, you may receive above message. What you need to do is switching to a PPTP VPN connection, which doesn't need a certificate.  To do this, open the properties of the VPN connection, choose the Networking tab, and change the "Type of VPN" to PPTP VPN (default is Automatic). Also make sure you have good connection. Sometimes, poor connection can cause this issue too.

2. Install a valid machine certificate on the VPN server.

3. Stop and start the IPSec Policy Agent and RRAS  on the remote computer.

Post your questions, comments, feedbacks and suggestions

Related Topics

VPN error code
VPN Browsing Issues
VPN Logon Issues
VPN Name Resolution
VPN as Router
VPN Routing Issues
VPN TCP/IP Settings
Ports for VPN
VPN/PPTP
VPN Slow Issues

Previous Page   Next Page