Somebody any idea?
Jira has nothing to do with firewalls, other than you need to allow access through the firewall to Jira
So, I've no idea what you've done with the firewall, or why you fiddled with it as part of an upgrade, there was no need to touch it.
The Jira upgrade logs don't contain anything because the firewall is nothing to do with Jira
In short, you need to tell us what you actually did, and why you fiddled with the firewall, which will probably answer your own question!
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