Your example is amazing. I have a cisco VPN concentrator at client end they gave me the preshared key and other details
|VPN Schema | |IKE |
|————————+———————-+————————-|
|Authentication Mode | |Preshared Keys |
|————————+———————-+————————-|
|Authentication Algorithm| |MD5/HMAC-128 |
|————————+———————-+————————-|
|Encryption Algorithm | |3DES-168 |
|————————+———————-+————————-|
|Diffie-Hellman Group | |Group 1 (768-bits) |
|————————+———————-+————————-|
|IKE Time Lifetime | |86400 |
|————————+———————-+————————-|
|Authentication | |ESP/MD5/HMAC-128 |

They use the group 1 dh and authentication and encryption is different than the one found in openswan or freeswan.

Please advice.

Thanks and Best regards
Atul Chaudhari