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swo0sh_gt_13163's avatar
swo0sh_gt_13163
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Jul 25, 2014

Unable to generate PMS Key to decrypt SSL Traffic in Wireshark.

Hello Folks,

Recently I was troubleshooting an issue, where SSL Offloading was configured on F5. I wanted to wrap off the TLS in order to analyze HTTP traffic. While generate the PMS key, I found following error on F5 CLI.

Problem loading private key
ERROR: Couldn't create network handler

Customer has 2 pair of F5 appliances, and both are showing the same error message while generating PMS. Any clue?

Cheers! Darshan

debugging
pms key
ssldump

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  • Kevin_K_51432's avatar
    Kevin_K_51432
    Historic F5 Account
    Jul 25, 2014

    Hi Darshan, I'm not very familiar with that error. What little testing I did shows this may be due to using the wrong name. There is dtca.key, but no dtca1.key:

     ssldump -k /config/ssl/ssl.key/dtca.key -r /var/tmp/this.dmp port 443
 ssldump -k /config/ssl/ssl.key/dtca1.key -r /var/tmp/this.dmp port 443
Problem loading private key
ERROR: Couldn't create network handler

    Hope this offers some help.

    Kevin

  • swo0sh_gt_13163's avatar
    swo0sh_gt_13163
    Icon for Altostratus rankAltostratus
    Jul 25, 2014

    Hello Kevin,

     

    Seems helpful. I will verify my ssldump command again and confirm what was wrong.

     

    Thank you very much!

     

    Cheers! Darshan