For more information regarding the security incident at F5, the actions we are taking to address it, and our ongoing efforts to protect our customers, click here.

Forum Discussion

NN's avatar
NN
Icon for Altostratus rankAltostratus
Jul 19, 2023
Solved

Getting TCP Reset-0 from server when routing HTTPS traffic via F5

We would like to place the working public URL behind the F5. The current connection works similarly to a firewall NATing a public IP address to a private one before sending it to the server. We place...
application delivery
  • NN's avatar
    NN
    Jul 20, 2023

    Paulius Thanks to jump on this. I have found the issue.

    The server was sending the certificate rather than F5, so we needed to set our HTTP profile on F5 to none.

Paulius's avatar
Paulius
Icon for MVP rankMVP
Jul 20, 2023

NN If you can please provide your topology with what you have described above, the F5 configuration for the Virtual Server (VS) and anything configured in it. The configuration for the VS should be it, any profiles such as tcp or SSL profiles, pool configuration, and any irules or traffic policies that you might have configured. My best guess currently is that the F5 is not the gateway for the servers you are balancing to so you most likely have to turn on SNAT but that's just a guess without knowing your topology or the F5 configuration.

NN's avatar
NN
Icon for Altostratus rankAltostratus
Jul 20, 2023

Paulius Thanks to jump on this. I have found the issue.

The server was sending the certificate rather than F5, so we needed to set our HTTP profile on F5 to none.

  • Leslie_Hubertus's avatar
    Leslie_Hubertus
    Ret. Employee
    Jul 25, 2023

    Thanks for following up with the solution!