our customer has a branch office that should be connected to central place via VPN site-to-site connection.
In branch is in use ADSL line via ethernet cable with name and password authentication again ISP network. For connection will be used a cisco 871 router in branch with two ethernet interfaces (LAN/WAN).
in central is ASA for VPN termination.
How to configure this router to work with ADSL circuit and what type of VPN to use? (maybe a PPPoE protocol...)
Can someone help how to configure this via CLI?