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Thiyagu_343098's avatar
Thiyagu_343098
Icon for Nimbostratus rankNimbostratus
Nov 24, 2018

need help to fix SSL read: errno -5961

Hello All, We have an application VIP on F5. User is trying to access the application VIP on F5 using HTTPS from a linux system and the SSL handshake between the application on linux system and the F5 VIP is not working.

 

we tried using curl to figure where the session is getting droped and we are finding the below error:

 

  • SSL read: errno -5961
  • Closing connection 0 curl: (56) SSL read: errno -5961

Could you please help me know what could be the possible cause of the issue and anything I can do on the Big-IP side to fix the issue?

 

The certificate is installed properly on the linux system and the certificate chain is also correct.

 

Thanks a lot in advance for your help.

 

Regards, Thiyagu

 

application delivery
BIG-IP
LTM
  • Simon_Blakely's avatar
    Simon_Blakely
    Icon for Employee rankEmployee
    Nov 25, 2018

    Please provide the complete output of

     

    curl -kv https://host/uri

     

    From some quick research, it looks like there is a timeout getting the response data back from the server. This could indicate a MTU issue in the path between the client and the server.