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Error Code: 800 Unable to establish the VPN connection.

Feb 13, 2015
May 18, 2023
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Error Description: The remote connection was not made because the attempted VPN tunnels failed. The VPN server might be unreachable. If this connection is attempting to use an L2TP/IPsec tunnel, the security parameters required for IPsec negotiation might not be configured properly.

Possible Cause: This error comes when the VPN tunnel type is ‘Automatic’ and the connection establishment fails for all the VPN tunnels.

Possible Solution:

1 Double-check that the VPN Server address, Username, and password are correct

2 Set the router and firewall settings to allow for PPTP and/or VPN pass-through
TCP Port 1723 and GRE Protocol 47 must be opened/enabled for PPTP VPN connection.

3 For Windows users, go to the VPN Properties, click on the Security tab
and change Type of VPN to Point to Point Tunneling Protocol (PPTP)


Mac: Unable to establish the VPN connection

Some of the Mac users also face this issue as they include http with server address.  Make sure you do NOT includehttp://” and “/” with server address:

View complete Common VPN Error List.

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