Use fully qualified domain names for network infrastructure – With UniFi Example

Use fully qualified domain names for network infrastructure – With UniFi Example

FQDNs (fully qualified domain names) make managing your infrastructure much easier. I also forgot to say in the video that FQDNs are easier to remember than IPs (for some people). FQDNs point names to IPs. IPs can change — names can last as long as you need.

00:00 – Intro
00:10 – What’s an FQDN
01:25 – UniFi FQDN example
02:15 – Why use FQDNs
03:00 – Other services
04:50 – Wrap Up

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  1. trythat on November 26, 2021 at 11:56 am

    As others have said, please go into a home lab/lan setup. I have ddns and a cloudflare account, but am worried about security where really I keep everything internal. I do use pfsense, so I would like that as a starting base and the perhaps how using a vpn into pfsense allows us assess to the lan, rather than having to setup nginx and lets encrypt.
    Thinking about it I would like to have all FQDN for all my internal Lan, and then if access is needed from outside go via pfsense with a vpn.
    Looking forward to you expanding.

  2. sitte on November 26, 2021 at 11:56 am

    Thank you for pushing more people towards this! Just one question: I never thought about also using this for the host inform option in unifi. Can I just change it in the settings and all already connected devices will get reprovisioned or do I have to add all devices from scratch after changing the host inform address in unifi?

  3. 77seiichi on November 26, 2021 at 12:01 pm

    I would like to see info on setting up Synology MailPlus Server on my DS1520+ NAS. I have tried doing it but no luck as of yet. Either by using a static IP or Dynamic IP, thanks.

  4. Rendog90 on November 26, 2021 at 12:06 pm

    So do I need to pay for a domain name to use FQDN

  5. Keaton Taylor on November 26, 2021 at 12:10 pm

    You are a true legend for making a video on this. So many times FQDNs are forgot entirely by operations engineers, but it absolutely makes things easier to manage and ultimately safer with proper TLS validation within the browser.

  6. Manuel Thallinger on November 26, 2021 at 12:12 pm

    The question is, is it a secure to use your public domain für internal devices, even when its mapped to just a internal ip ?

  7. Fabian Gort on November 26, 2021 at 12:13 pm

    So you made a sub domain. And used that name in udm. But that’s it? Then it works? No mapping needed manually?

  8. Dave Robertson on November 26, 2021 at 12:14 pm

    Great video, but it seemed to just be a taste of what I was hoping for. Would like to see you go more in depth about setting it up for LAN side devices. Where are you entering the 192.168.x.x address and defining the A records for those? Maybe I am just missing something. Thanks

  9. João Lyra Araujo on November 26, 2021 at 12:24 pm

    Please dive into FQDN for local network. Great topic.

  10. Mark Locher on November 26, 2021 at 12:34 pm

    Thank you! I’m not sure but I believe this would stop our need to run a script in the controller via Putty whenever our main IP via fiber goes down and our backup PTP antenna from the ISP kicks in.
    We also have to run the right script in the controller if we make changes ti settings as it breaks our VPN link to Amazon. Not sure that FQDN would solve this.
    Going to look into it. Any feedback would be welcome.

  11. Bahman Hatami on November 26, 2021 at 12:35 pm

    Good topic but I ask you if it’s possible make another video and deep diver please.
    And I mean if you be more technical or more specific, we can google the terms you will be talking about, and fortunately will keep up.

  12. Jason Cherry on November 26, 2021 at 12:38 pm

    What about how to setup the internal FQDN information in "services" like Pi-Hole or in your UniFi network. I just got my new UDMP-SE and I have to migrate my controller from my unRaid hosted Docker container to the new UDMP-SE. I would LOVE a video on how to migrate. Keep up the awesome work and thank you.

  13. Paul Schafer on November 26, 2021 at 12:38 pm

    Thank you. Would definitely like a deep dive in understanding how to apply an FQDN when using AWS as the host of the controller.


  14. Beeliner12 on November 26, 2021 at 12:40 pm

    Thank you very much Willie. I’ve been waiting on clarification for this a very long time… I believe the unclearness is that everyone says to use your FQDN, they explain what FQDN stands for, and they show how to format and enter the FQDN in the Host for Inform field , but never does anyone explain what the FQDN belongs to. So please correct me if I’m wrong. .. The FQDN you enter into the "Host for Inform" is the FQDN (in this case) of your "Hosted" Controller". So if you set up a controller on a server, whether on your intranet or the internet, the "Host for Inform" will be the website, of where you have your controller located, or to put it another way, the link to the controller…. Am I close?

    I was also wondering if you can use the Host for Inform of a remotely (or locally) located Cloud Key that is accessed via Unifi’s hosted controller portal. If so, can you build out multiple VLAN separated networks and keep an eye on them through the one remote cloud key?

  15. Eduardo Rivas on November 26, 2021 at 12:41 pm

    I use digital Ocean to run my controller. My controller has just stopped working. I am just going to create a new droplet and start over. It is easier to use a backup. I would like to know how to troubleshoot the controller. I do have SSH access. It just says offline.

  16. Eduardo Almonte Mieses on November 26, 2021 at 12:42 pm

    Thank you! This is a biggie and id love a more detailed revisit on how to use FQDNs for the home networks. Specifically interested in seeing examples of public and internal-only LAN use cases, as well as how to best use my domain on Synology and its services.

  17. Richard Mekolichick on November 26, 2021 at 12:50 pm

    In depth video needed, please.