I am a teleworker. At my home I have ADSL connection with Modem, Cisco 871 security bundle router (1 wan, 4 lan). I want to configure Site to Site IPSEC for accessing Corporate data from my pc only on utp. And want other users at my home to access internet simultaneously on utp. I only have one subnet on LAN /24. Should i break subnet and connect adsl lan port to router wan port. Configure IPSEC for /25 and other / 25 access internet. Look forward for revert with router configuration. And a low level design. Thanks for the support.