net.tcp.service returns 2

[ale123]

Hi all.
I've got some trigger based on net.tcp.service[http].last that sometimes returns 2.
I've read on Zabbix Manual that 1 is "all ok", 0 is "unavailable" but 2 what does it mean?

[xs-]

If i remember correctly, 0 1 2 is for ok, rejected, unreachable (maybe not in that exact order)