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Mohammed_M_Irfa's avatar
Mohammed_M_Irfa
Icon for Nimbostratus rankNimbostratus
Mar 05, 2020

HTTPS application health monitor

Hi folks,

 

Need your help to understand the HTTPS application health monitor,

How to capture the packets to view send and receive string?

In tcpdump, i can't see the send and receiving string if we enable the SSL parameters!

Is their any alter options to find the response from server?

 

 

Thanks

Irfan

  • Hi, use cURL command to see the server response :

    curl -vk https://yourdomain.com/request
    • Lidev's avatar
      Lidev
      Icon for MVP rankMVP

      Can you show me your curl output ? you received an HTTP 200 OK ?

  • [Active:Changes Pending] ~ # curl -vk https://x.x.x.x//index.html

    *  Trying x.x.x.x...

    * Connected to x.x.x.x (x.x.x.x) port 443 (#0)

    * Cipher selection: ALL:!EXPORT:!EXPORT40:!EXPORT56:!aNULL:!LOW:!RC4:@STRENGTH

    * successfully set certificate verify locations:

    *  CAfile: /etc/pki/tls/certs/ca-bundle.crt

     CApath: none

    * TLSv1.2 (OUT), TLS handshake, Client hello (1):

    * TLSv1.2 (IN), TLS handshake, Server hello (2):

    * TLSv1.2 (IN), TLS handshake, Certificate (11):

    * TLSv1.2 (IN), TLS handshake, Request CERT (13):

    * TLSv1.2 (IN), TLS handshake, Server finished (14):

    * TLSv1.2 (OUT), TLS handshake, Certificate (11):

    * TLSv1.2 (OUT), TLS handshake, Client key exchange (16):

    * TLSv1.2 (OUT), TLS change cipher, Client hello (1):

    * TLSv1.2 (OUT), TLS handshake, Finished (20):

    * TLSv1.2 (IN), TLS alert, Server hello (2):

    * error:14094410:SSL routines:SSL3_READ_BYTES:sslv3 alert handshake failure

    * Closing connection 0

    curl: (35) error:14094410:SSL routines:SSL3_READ_BYTES:sslv3 alert handshake failure

     

    • Lidev's avatar
      Lidev
      Icon for MVP rankMVP

      I see, what version of cURL you use ? (curl --version), Support of SSLv3 was disabled by default in 7.39.

      We'll try forcing TLS 1.2 : curl -vk ---tlsv1.2 https://x.x.x.x//index.html