# Synology SNMP Network Monitoring with LibreNMS Docker

**URL:** <https://forums.jasonloong.com/t/synology-snmp-network-monitoring-with-librenms-docker/13>\
**Category:** Website Posts\
**Tags:** tutorials, technology\
**Created:** [February 24, 2020, 9:03am UTC](https://forums.jasonloong.com/t/synology-snmp-network-monitoring-with-librenms-docker/13 "2020-02-24T09:03:52Z")\
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**Author:** ![jasonloong](https://forums.jasonloong.com/user_avatar/forums.jasonloong.com/jasonloong/32/8_2.png) [@jasonloong](https://forums.jasonloong.com/u/jasonloong)\
**Post date:** [February 16, 2021, 1:49am UTC](https://forums.jasonloong.com/t/synology-snmp-network-monitoring-with-librenms-docker/13/50 "2021-02-16T01:49:03Z")

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Hm, TCP-6556 is FROM the librenms, so you don’t need to open ports on the container side, you would need to check firewall and allow TCP-6556 on the device with the agent.

I came across this: [Hi everyone! Question about LibreNMS and the check\_mk agent - LibreNMS Community](https://community.librenms.org/t/hi-everyone-question-about-librenms-and-the-check-mk-agent/56)

I would do the following:

1. Ensure firewall allow on the device with agent
2. In librenms, under the device with agent, Settings \> Modules \> Enable Unix Agent (Left of page)
3. You have to manually allow the apps/modules that you want to monitor on. [Application Docs / Agent](https://docs.librenms.org/Extensions/Applications/#agent)
4. On same device page, 3 dots (beside Settings/Gear Icon) , click on Capture, under Discovery, click Run. Check for check\_mk logs (screenshot: [LibreNMS and Raspberry Pi - #3 by jasonloong](https://forums.jasonloong.com/t/librenms-and-raspberry-pi/32/3))
5. Do same as above for Poller, and check logs on the check\_mk/unix agent

If that still does not work

1. You have to manually check the scripts provided and make sure they point to correct bin PATH if non-standard Linux like FreeBSD
2. If Windows: make sure firewall is allowed

Hope that helps 🤔 Let me know if that worked out!

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