Error 51: Unable to communicate with the VPN subsystem

This article explains how to correct the Cisco VPN “Error 51” problem usually found on Apple Mac OS X. We provide full explanation of the problem and explain how Error 51: Unable to communicate with th - Cisco Community Also if there are any other vpn clients from other vendors, uninstall them as well. 3) Make sure windows firewall and/or any anti-virus utility programs are disabled. Fix an error 51 with the Cisco VPN Client | Macworld One of the most-used programs on my Mac is the Cisco VPN Client, which is what I use to connect to Macworld’s VPN when posting articles such as this one. (OS X’s built-in VPN client also works

Solved: Meraki VPN Some users get 691 error when

Jun 07, 2016 · A credit card processing response of Auth Code 51, is a decline for insufficient funds, the credit limit has been exceeded. What happens when the customer says, “there’s nothing wrong my Visa card, put it through again”?

Vista Home Premium (32 bit) with SP2 and all windows updates on an HP a6220n. I also notice (under Control Panel\Network Connections) that my "Local Area Connection 2" (Cisco Systems VPN Adapter" is Disabled. Even after enabling it I have the same problem.

Meraki VPN not connecting error code 789 - The Meraki I've had problems in the past where the PSK was a complex string. My guess is some VPN clients couldn't process those complex characters. For a short test, try making the PSK something simple like "password" and see if that works. What is Auth Code 51, declined? Jun 07, 2016 Common VPN Error Codes – HMA Support Jul 10, 2020