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  • How to Fix "Informational Exchange message must be encrypted"

    This is the error you might get while configuring Openswan. As I received this error when I was configuring openswan to connect my sonicwall vpn.


    #1: Informational Exchange message must be encrypted


    Make sure you have set these parameters in your Sonicwall 
    IKE (Phase 1) Proposal
    DH Group: Group 5 (not 2)
    Encryption: 3DES
    Authentication: SHA1
    Life Time: 28800

    Ipsec (Phase 2) Proposal
    Protocol: ESP
    Encryption: 3DES
    Authentication: SHA1
    Check "Enable Perfect Forward Secrecy"
    DH Group: Group 5
    Life Time (seconds) 28800

    Check these parameters in your linux machine
    # vi /etc/ipsec.conf
           esp=3DES-SHA1            # protocol used for authentication in sonicwall

    To view a screenshot of this page on sonicwall click on the following link

    To have a look at all the configuration files and steps follow this page:
    openswan configuration in Red Hat linux

    Follow the below links for more tutorials

    How to Fix "Informational Exchange message must be encrypted" How to Fix "Informational Exchange message must be encrypted" Reviewed by admin on Wednesday, October 10, 2012 Rating: 5

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