Articles

 Change/Fix MTU on MacOS

Official MacOS tutorial: http://support.apple.com/kb/HT2532   Products Affected Mac OS X 10.4,...

 Change/Fix MTU on Windows XP

Windows XP use a fixed maximum transmission unit (MTU) size of 1500 bytes for all PPP...

 Error 691, Access denied because username and/or password is invalid

Verify the logon ID and password are correct. Make sure the VPN connection's security option...

 I received error 721, which says the remote computer is not responding.

Cause: This issue can occur if the network firewall does not permit GRE traffic (IP protocol...

 PPTP VPN Error 619, can not connect

This is a pptp client error that basically means it could not establish communication with the...

 PPTP VPN Error 800

Resolutions: if you have firewall, open TCP Port 1723, IP Protocol 47 (GRE). make sure you...

 What is VPN pass-through ?

First, if you haven't already, disable any pc firewall while troubleshooting the VPN connection....