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  1. Hi Thomas,

    That’s right, when you use main mode you can see that the first 4 messages (with all the parameters) are sent in clear text. Take a look at this wireshark capture:

    IKEv1 main mode

    Rene

  2. Hi Francesco,

    DH is used to generate a shared private key over an insecure network (like the Internet). Here’s an example of the different DH groups:

    Diffie-Hellman group 1 - 768 bit modulus
    Diffie-Hellman group 2 - 1024 bit modulus
    Diffie-Hellman group 5 - 1536 bit modulus
    Diffie-Hellman group 14 - 2048 bit modulus
    Diffie-Hellman group 19 - 256 bit elliptic curve
    Diffie-Hellman group 20 - 384 bit elliptic curve
    Diffie-Hellman group 21 - 521 bit elliptic curve

    The higher the DH group number, the more secure the exchange will be.

    Here’s an interesting link f

    ... Continue reading in our forum

  3. Hi Rene,

    Am I right about DH if i say:
    I configured PSK on both sides, then DH use its own (differrent) key to secure the configured PSK and it will do the exchange?
    Thanks

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