Main Mode and Aggressive Mode IPSEC

bharath917bharath917 Posts: 17Member ■□□□□□□□□□

I know we use Aggressive mode when one peer has Dynamic IP.
But why Dynamic IP cannot be used in Main Mode. I was asked this question in an Interview and i was unable to answer.



  • deadjoedeadjoe Posts: 23Member ■■□□□□□□□□
    Main mode can be used with dynamic IPs.

    Aggressive mode sends IKE ID and hash in clear text (if using pre-shared key). Don't use aggressive mode, force main mode if you can. Even better, use IKEv2.
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