I am atempting to establish a secure VPN tunnel with a vendor. They use a Sonicwall fw, I am using an ASA 5520. I think my side is configure correctly. We agree on the config parameters, hashing,encryption, shared key etc. but I can ping their IP from everywhere on the 'net and they cannot see my NATted IP. I can do a traceroute to their from anywhere. I shold mention they are located in Bangalore. Is there any known issue concernig this configuration ? Any ideas ?