Describe the symptom, not the conclusion:
"The firewall is blocking my app"
No, your application has triggered a pop up box with a pre-written string saying it is unable to communicate with a specified server. We do not know anything else about why that happened or what is potentially wrong in the chain of dependencies for that error to appear. The error could be a completely incorrect catch-all. You do not know anything until you start investigating.

@SwiftOnSecurity I always ask this of my service desk techs when they hit me with the “has anything changed about the network at (location)?”

Whatcha trying to do?

@SwiftOnSecurity I’m also pushing management to let the service desk have access to our logs and read only access to our management tools, so I can start replying with where to find their answers instead of doing it for them.