Active Checks via passive Proxy not working

[junky84]

Hi @ all,

first the configuration:

# Zabbix Server
- Version 4.0.12
- OS Debian

# Zabbix Proxy
- Version 4.0.12
- Passive mode
- same network as server, but other VLAN (firewall in between). Server has access to proxy with port 10051/TCP
- OS Debian

# Host
- Agent Version 4.0.4
- OS Debian
- same VLAN as proxy, no firewall in between

In the host config for Server and ServerActive the proxy DNS Name is configured.

My problem is that the passive checks arrive at the server and work, but the data of the active checks doesn't. There is also no error message in the web frontend. Also not with the Host Item.

This applies to all hosts behind the proxy. For hosts that communicate directly with the server, the active checks also work.

There is nothing in the logs of server, proxy and host (even in debug level 5). The only thing I found is in the host log, which didn't help me either:

active check configuration update from [zabbix.proxy.address:10051] started to fail (ZBX_TCP_READ() timed out)

Does anyone have an idea what I can try out, or where the error is located?

[rolfrolf]

Got the same problem.
Did you resolve the issue?

[kloczek]

That has nothing to do with passive proxy. It is network layer issue.
Check connectivity using telnet/tcpdump.

[rolfrolf]

I did everything works fine
agent can connect to the proxy and the proxy to the server and server to the proxy on those ports

[TheFactor82]

Same problem here too, but my Proxy is in active mode.
It the Host is monitored by the Server, no problem. If it is monitored by the Proxy, active checks gets queued forever