D-Link DWR-956M User Manual page 102

Integrity Algorithm: The authentication algorithm to use with the IPSec tunnel.
This can be MD5 or SHA1. The default is MD5.
Diffie-Hellman Group: The Diffie-Hellman Group key size to use with the IPSec
tunnel.
This can be 768bit, 1024bit, 1536bit or 2048bit. The default is 1024bit.
Key Life Time: The key lifetime for the IPSec tunnel. The default is 3600 seconds.
Phase 2 Encryption Algorithm: The encryption algorithm to use with the IPSec
tunnel.
This can be DES, 3DES, AES. The default is DES.
Encryption Algorithm: The encryption algorithm to use with the IPSec tunnel.
This can be DES, 3DES, AES. The default is DES.
Integrity Algorithm: The authentication algorithm to use with the IPSec tunnel.
This can be MD5 or SHA1. The default is MD5.
Diffie-Hellman Group: The Diffie-Hellman Group key size to use with the IPSec
tunnel.
This can be 768bit, 1024bit, 1536bit or 2048bit. The default is 1024bit.
Key Life Time: The key lifetime for the IPSec tunnel. The default is 3600 seconds.