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Thread: TLS Renegotiation and Denial of Service Attacks

  1. #1
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    Default TLS Renegotiation and Denial of Service Attacks

    The following article was published yesterday.

    /http://blog.ivanristic.com/2011/10/tls-renegotiation-and-denial-of-service-attacks.html

    Is there a way to disable the client-initiated renegotiation in cpanel?

  2. #2
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    Default Re: TLS Renegotiation and Denial of Service Attacks

    Bump...

    Anyone??

  3. #3
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    Default Re: TLS Renegotiation and Denial of Service Attacks

    Quote Originally Posted by gkgcpanel View Post
    Bump...

    Anyone??
    Have you checked ssl renegotiation explained at "http://blog.ivanristic.com/2009/12/testing-for-ssl-renegotiation.html"

    If command produce an error then it means that renegotiation failed. However if it work and gives following output then it means that renegotiation is enabled on server

    SSL handshake has read 3440 bytes and written 435 bytes
    ---
    New, TLSv1/SSLv3, Cipher is RC4-SHA
    Server public key is 2048 bit
    Secure Renegotiation IS supported
    In my view it is better to upgrade openssl version to 0.9.8m or higher version if you receive above output.
    Last edited by storminternet; 11-11-2011 at 07:15 PM.

  4. #4
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    Default Re: TLS Renegotiation and Denial of Service Attacks

    Quote Originally Posted by storminternet View Post
    Have you checked ssl renegotiation explained at "http://blog.ivanristic.com/2009/12/testing-for-ssl-renegotiation.html"

    If command produce an error then it means that renegotiation failed. However if it work and gives following output then it means that renegotiation is enabled on server



    In my view it is better to upgrade openssl version to 0.9.8m or higher version if you receive above output.
    Thanks. That worked fine, and renegotiation failed.

  5. #5
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    Default Re: TLS Renegotiation and Denial of Service Attacks

    hi,

    I have read the blog you have given and i can see that the above mention issue will not happen if we have compiled mod_ssl with OpenSSL version 0.9.8m or later.You can view this in the below post.Please recompile your apache with mod_ssl using easyapache and check it over the the site.

    ----------------
    Apache HTTP Server Project
    -------------

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