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Hi,Confirm that netopia router is in bridging mode. As far I know you don't need to use pppoe on 871, because netopia should do it for you. Confirm that with your ISP.You should setup static IP on FE4, then the default gateway and DNS servers
You need to create a separate VLAN on your 871Example.VLAN 1 - corporate networkVLAN 2 - home networkVLAN2 will have different IP and ACL will not include it into VPN traffic.Basic IOS on 871 doesn't support many VLANs.You need to update the IOS.