When I connected my adsl router and got ip address is 10.1.1.1/8 then I use remote access vpn terminating on firewall then authentication work fine and got ip address from the pool is 10.7.0.1/16 but I can't access local lan from this if I dialed-up from my pc and got ip address 2x2.102.x.y then I connected remote access vpn and authentication I can access local lan no problem.
It is routing issue on pc with overlap ip or not ???
please clarify or provide helpfull link
It seems like its a nat-t issue.
Make sure the VPN headend has "isakmp nat-t" enabled (if its a PIX) . If a concentrator, please make sure "IPsec NAt-T" is enabled.
Also, make sure, on the client, "Enable Transparent tunneling" is checked, with IPSec over UDP NAT/PAT selected.