Zabbix_get item value differs from Zabbix interface

[begs4399]

I have a simple check like this:

Name: Tomcat Service Check
Type: Simple Check
Key: net.tcp.service[http,,1701]
Type of information: Numeic (unsigned)
Show value: Service State

If I run this check on the Zabbix server:
#zabbix_get -s 10.26.4.27 -k net.tcp.service[http,,1701]
it returns:
1

In Zabbix web interface, it returns 0 (down)

I double-checked everything, tried a lot of things on different ports and servers but still the same
It works on zabbix_get, but not in the GUI!!!

Anyone can help ???
Thanks a lot!

[begs4399]

UPDATE:
I have no problem on standard ports (80, 443, 445, 3389) they report well on the GIU

but MSSQL (port 1433) has the same problem (UP on zabbix_get but DOWN on the web interface)

I am running Zabbix 5.0.11 on CentOS, tested with agents 5.0.10 and 5.2.5, on Solaris and Windows

[begs4399]

Well SELinux on the Zabbix server was blocking this particular port (1701) - It is solved now!

[TheFactor82]

Well, I'm hitting the same exact problem in my environment...
Zabbix 5.0.19 on Server and Proxy (both Centos, with Selinux enabled in permissive mode)
Zabbix 5.0.28 on target host (Ubuntu 22.04).
When execute a zabbix_get command from proxy that is selected for this host, I receive that the service is up:

zabbix_get -s trr-git-lp1 -k 'net.tcp.service[https]'
1

(also executing zabbix_agentd directly on the host says that the service is up:

zabbix_agentd -t net.tcp.service[https]
net.tcp.service[https] [u|1]

But on the gui, the result is always 0.
This is not happening with a target host on Ubuntu 20.04

Any hint?