I am struggling to get my #archlinux IKE2 VPN working. I used to be able to just add the certificate and private key with the NetworkManager plug- in but now it complains about not being able to find the private key.

#strongswan

[solved]. Something to do with NetworkManager-StrongSwan not asking for the password to decrypt my private key when I activate the VPN connection. I decrypted the key with OpenSSL rsa and now all is working again.

An older version of NetworkManager on Debian does ask for the password though.

Next challenge is to figure out how to add Blowfish and get my legacy VyprVPN connection working...

So I didn't need Blowfish to get my VyprVPN working. I downloaded their config files and discovered that AES-256 requires me to point it at their server on port 443 (not the default OpenVPN port of 1194).