Draytek Vigor2830 Series User Manual page 365

If a PPP-based service is selected, you should further specify the remote peer IP Address,
Username, Password, and VJ Compression for this Dial-In connection.
At last, set the remote network IP/subnet in TCP/IP Network Settings so that Router B
7.
can direct the packets destined to the remote network to Router A via the VPN
connection.
355
Vigor2830 Series User's Guide