My problem includes little bit design issue.I have site2site vpn between customer and my cisco router.But the customer wants to add L2TP traffic in this site2site tunnel.I have no experince about L2TP tunneling.I have also ASA 5500 series which locates behind the Cisco router.ASA interfaces have not public IP.Question is that Can I use my ASA firewall for just L2TP tunelling?Every document says ASA use IPSEC over L2TP. But IPsec tunneling is already done by Cisco Router. Or should I have to do both tunnel in same network device? I mean ASA or Router?
