i'm trying to setup a zabbix server behind barracuda firewall.
Other configurations are working but for some reason this IP is not.
"ZABBIX" on our Barracuda is a service configured in this way:
The barracuda is returning very strange messages. One that the access is a "Normal Operation" and the second one with "Host Access Failure" (click the image to enlarge).
What could be wrong?
I have disabled UFW (Uncomplicated Firewall) on my Debian (ZABBIX) machine and it is still not working. Additionally, port 22 (SSH) is working perfectly fine, and it is the only one working from outsite https://www.whatismyip.com/port-scanner/ and nmap are showing me only ssh open, 80 and 443 closed. Any tips?
Machine behind Barracuda has only one port open (22 - ssh), but in the service configuration there listed 5 of them :< Online port scanners says that only 22 is open. UFW on Debian says not only ssh, and netstat is also showing more ports