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Attention: The Community will be in read-only mode on 12/14/2017 from 12:00 am pacific to 11:30 am.

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New Member

vpn tunnel

Hi all, when people define phase 1 and phase 2 of ipsec, what does this mean, also , why do you have different settings i.e aes,sha1 etc for isakmp and ipsec profiles, why do you need this ?

2 REPLIES
New Member

Re: vpn tunnel

Phase 1 establishes a secure connection, so the random key for phase 2 can be passed. This secure connection is either based on the pre-shared key or a cert. The algorithms you choose are just to determine how to negotiate the session.

Phase 2 uses the secure key created and passed in phase one to create the tunnel to pass data.

You can specify a different encryption algorythm for your key exchange and data exchange.

IPsec, can be pretty daunting to get into. There is a lot of doc's out there both on the web and on cisco's site. I'd recommend doing some research. I've found the learning curve to be steep.

New Member

Re: vpn tunnel

so is phase 1 and 2 both the intial connection to the device, or is my domain authenication phase 2? i am confused

cheers

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