User's Manual

Industrial VPN Security Gateway
IVR-100_IVR-300 Series
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ESP
It offers AES, 3 DES, SHA 1, SHA2, and MD5.
1. AES: All using a 128-bit, 192-bit and 256-
bit key. AES is a
commonly seen and adopted nowadays.
2. 3DES: Triple DES is a block cipher formed from the DES cipher
by using it three times. It can achieve an algorithm up to 168
bits.
3. SHA1: The SHA1 is a revision of SHA. It has improved the
shortcomings of SHA. By producing summary hash values, it
can achieve an algorithm up to 160 bits.
4. SHA2: Either 256, 384 or 512 can be chosen.
5. MD5 Algorithm: MD5 processes a variably long message into
a fixed-length output of 128 bits.
ESP Keylife
You can specify how long ESP packets are valid.
Perfect Forward
Secrecy (PFS)
Set the function as enable or disable.