Setup PAP / CHAP secrets or try noauth switch to pppd. Or put following lines in
and call pppd with argument 'call vpn'
read man pppd for details.
The error I'm getting as below.
/usr/sbin/pppd: The remote system is required to authenticate itself
/usr/sbin/pppd: but I couldn't find any suitable secret (password) for it to use
to do so.
/usr/sbin/pppd: (None of the available passwords would
let it use an IP