We installed an ASA5505 in a branch office. The ASA5505 is behind a DSL PPOA Slipstream modem/router. This new branch office can create IPSEC tunnel with central office to a PIX506e. The problem: some remote Client VPNs using cable/DSL can not create a tunnel to the 506e anymore, since installing the ASA5505 branch office. The client VPNs can now establish a tunnel using dial up, but not able to create a tunnel using their cable/DSL service. Any suggestions? I have been told that the ASA5505 works with PPOE and not PPOA, yet IPSEC tunnel is established using PPOA.