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FAQ ID # 49
Last Update : 2006/02/24
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Question / Issue
What do DH1 and DH2 mean in the Key Group field on the Advanced VPN Rules page?

Answer / Solution
DH1 is also known as Diffie-Hellman Group 1, a 768 bit random number.  DH2 is Diffie-Hellman Group 2, a 1024 bit random number. 

These specify the key length used for Phase I negotiations.

DH1 (768 bits) is the default value.  This may need to be changed to DH2 to match the Key Group length used by the other side of your VPN connection in order for a tunnel to be successfully built.


Direct Link to This FAQ
http://www.proxicast.com/AbsoluteFM/?f=49

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