Draytek Vigor2800 Series User Manual page 124

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.
7. At last, set the remote network IP/subnet in TCP/IP Network Settings so that Router A
can direct the packets destined to the remote network to Router B via the VPN
connection.
Settings in Router B in the remote office:
1. Go to VPN and Remote Access and select Remote Access Control to enable the
necessary VPN service and click OK.
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Vigor2800 Series User's Guide