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Editorial Team
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Asked: 2026-06-10T15:24:38+00:00

I am trying to establish connection between ZABBIX SERVER which has been installed on

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I am trying to establish connection between ZABBIX SERVER which has been installed on Ubuntu Virtual Machine and ZABBIX AGENT which has been installed on my local machine (windows).

I’m not sure whether this is problem with zabbix.server.conf and zabbix.agent.conf files OR problem with Virtual Machine. So any suggestions / advice is much appreciated !

Zabbix Server Details: ( installed on Ubuntu )

  1. ip address
    enter image description here

  2. VM NAT details
    enter image description here

Zabbix Agent Details ( installed on Windows )

  1. enter image description here

Testing between Agent (on windows) and server ( on ubuntu )

  1. pinging success from server to agent
    enter image description here

  2. pinging failure from agent to server
    enter image description here

  3. telnet failure in both cases
    enter image description here

    and

    enter image description here

Note: Server is running and also agent is running

Troubleshooting Based on Ansgar Answer:

  1. port forwarding
    enter image description here

  2. tcptrace on ubuntu
    enter image description here

    as you mentioned it shows open connection

  3. tcptrace on windows
    enter image description here

    still connection is closed, what am i doing wrong in Port forwarding ? i also tried with host id as 127.0.0.1

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1 Answer

  1. Editorial Team

    Only the second telnet connection fails (Could not open connection). The first one is established successfully (Connected to 10.184.230.129), but then closed by the remote host (Connection closed by foreign host).

    The connection client->server most likely fails, because the server-VM is behind a NATed interface. You’ll have to forward the required port(s) from the host to the guest (the button “Port Forwarding” in the network adapter configuration).

    That doesn’t explain why the connection server->client fails, though.

    Which ports are server and agent listening on? Use netstat to check that. Also, the hosts are apparently on different networks, so I’d check with tcptraceroute (Linux) and tracetcp (Windows, you’ll also need WinPcap for it to work) at which hop exactly the connection fails.

    Server->Client: tcptraceroute -n 10.184.230.129 10050

    Client->Server: tracetcp 10.0.2.15:10051 -n

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