TMS zl Management and Configuration Guide ST.1.1.100226

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Virtual Private Networks
Configure a GRE over IPsec VPN with IKE
7. If you selected ESP in the previous step, select one of the following for
Encryption Algorithm:
•NULL
If you select this option, VPN traffic will not be encrypted.
•DES
•3DES
• AES-128 (16)
• AES-192 (24)
• AES-256 (32)
The number in parentheses after AES options indicates the key length for
the algorithm in bytes.
8. If you selected either ESP or AH, for Authentication Algorithm, select one of
the following:
• None
You must not select None if you selected AH for the Security Protocol
or if you selected NULL for the ESP Encryption Algorithm.
•MD5
• SHA-1
•AES-XCBC
9. Click OK.
The IPsec proposal is displayed in the VPN > IPsec > IPsec Proposals window.
Figure 7-218. VPN > IPsec > IPsec Proposals Window (Proposal Added)
10. Click Save.