VPN connection failed because service stopped unexpectedly

After

1. sudo apt-get install network-manager-vpnc

2. Import my .pcf file

3. Try to connect to the VPN and get the following error:

The VPN connection 'PRUEBA' failed because the VPN service stopped unexpectedly

How can I fix this issue?

3 Answers

This might not answer your question, but check if the option in the 3rd pic is enabled. If not enable it & connect again.

I am using Linux Mint 19 and it work for me.

1. Disable your firewall (sudo ufw disable)
2. Disable your ipv6

For Red-Hat system :

sudo sysctl -w net.ipv6.conf.all.disable_ipv6=1
sudo sysctl -w net.ipv6.conf.default.disable_ipv6=1

For Debian system :

sudo nano /etc/sysctl.conf

Add the following at the bottom of the file :

net.ipv6.conf.all.disable_ipv6 = 1
net.ipv6.conf.default.disable_ipv6 = 1
net.ipv6.conf.lo.disable_ipv6 = 1

After all, restart your machine.

I got this error because I had not updated the VPN password to the system-wide password, which I had changed meanwhile.