Setup PAP / CHAP secrets or try noauth switch to pppd. Or put following lines in /etc/ppp/peers/vpn --- noauth name vpn ---

and call pppd with argument 'call vpn'

read man pppd for details.

Amish.

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

address.)