Symptom
After upgrading the FMC from 7.0.4 to 7.0.5, it stopped using proxy authentication anymore.
There were no changes in the configurations, only the upgrade that triggered the issue.
When the FMC tries to connect to the Smart Account portal, it gives this error:
Failed to send the message to the server. Please verify the DNS Server/HTTP Proxy settings.
Conditions
FMC configured with proxy using authentication
Further Problem Description
From the Wireshark capture, we can see that the FMC is not using the proxy authentication despite the fact that it is configured on the FMC GUI and gives the http error "407 proxy authentication required".
We can see the following info from the capture in the Proxy-Authorization field:
KG5pbCk6KG5pbCk= --> when we do Base64 decode it gives: (nil):(nil) instead of the proxy server credentials that are configured.
