Fortinet FortiGate-800 User Manual download pdf (Page 234)

234 Fortinet Inc.

Manual key IPSec VPNs IPSec VPN

5 Enter the Remote SPI.

The Remote Security Parameter Index is a hexadecimal number of up to eight digits

(digits can be 0 to 9, a to f) in the range bb8 to FFFFFFF. This number must be added

to the Local SPI at the opposite end of the tunnel.

6 Enter the Remote Gateway.

This is the external IP address of the FortiGate unit or other IPSec gateway at the

opposite end of the tunnel.

7 Select an Encryption Algorithm from the list.

Use the same algorithm at both ends of the tunnel.

8 Enter the Encryption Key.

Each two-character combination entered in hexadecimal format represents one byte.

Depending on the encryption algorithm that you select, you might be required to enter

the key in multiple segments. Use the same encryption key at both ends of the tunnel.

9 Select an Authentication Algorithm from the list.

Use the same algorithm at both ends of the tunnel.

10 Enter the Authentication Key.

Each two-character combination entered in hexadecimal format represents one byte.

Use the same authentication key at both ends of the tunnel.

11 Select a concentrator if you want the tunnel to be part of a hub and spoke VPN

configuration. See “Adding a VPN concentrator” on page 251.

12 Select OK to save the manual key VPN tunnel.

DES Enter a 16-character (8 byte) hexadecimal number (0-9, A-F).

3DES Enter a 48-character (24 byte) hexadecimal number (0-9, A-F). Separate the

number into three segments of 16 characters.

AES128 Enter a 32-character (16 byte) hexadecimal number (0-9, A-F). Separate the

number into two segments of 16 characters.

AES192 Enter a 48-character (24 byte) hexadecimal number (0-9, A-F). Separate the

number into three segments of 16 characters.

AES256 Enter a 64-character (32 byte) hexadecimal number (0-9, A-F). Separate the

number into four segments of 16 characters.

MD5 Enter a 32-character (16 byte) hexadecimal number (0-9, A-F). Separate the

number into two segments of 16 characters.

SHA1 Enter a 40-character (20 byte) hexadecimal number (0-9, A-F). Separate the

number into two segments—the first of 16 characters; the second of 24

characters.

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Fortinet FortiGate-800 User Manual Page 234