Imperva Cyber Community

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  • 1.  Client Connection are dropped at WAF end after enabling ECDHE under TRP Mode

    Posted 23 days ago
    we are using Imperva Securesphere On-Premises WAF.

    Facing a issue after enabling ECHDE under TRP . For Couple of Hours /days it was working fine .  After Sometime the connection attempts are blocked by WAF and Client are getting WAF error Page . we have enabled more than 6 times when the issue arise we will disable the same without any solution. Requesting the advise from experts.

    Below are the Ciphers we have enabled.
    Heartful thanks in Advance.
    Gokul Palanisamy,
    Senior Security Analyst.
    #On-PremisesWAF(formerlySecuresphere)

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    Inspira SOC
    SOC analyst
    Chennai TN
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  • 2.  RE: Client Connection are dropped at WAF end after enabling ECDHE under TRP Mode

    Posted 23 days ago
    Hi @Gokul SOC,

    Are you getting any Unsupported ciphers alerts?​
    Also sometimes you can get a WAF error page when the server is down.
    Can you confirm the server is up all the time?
    Also, does it work with the bridge mode?
    Best,

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    Ira Miga
    Imperva
    Knowledge Engineer
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  • 3.  RE: Client Connection are dropped at WAF end after enabling ECDHE under TRP Mode

    Posted 22 days ago
    Hi @Gokul SOC,

    You can ensure whether the problem is related to TRP or not by applying the steps in the following link:

    https://docs.imperva.com/howto/37f4b51a

    Regards,

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    Cezmi Cal
    technical support engineer
    Barikat Cyber Security
    Ankara
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