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  • Running Pi-hole on the UDM in Unifi 3.0+

    calendar July 20, 2025 nav_categories Tech nav_categories Networking nav_tags dns nav_tags unifi nav_tags ubiquiti nav_tags udm nav_tags udm pro

    Since firmware version 3.0 on the Unifi UDM/UDM Pro, podman is no longer available, so we had to use another method to create a container.

    We now use systemd-nspawn to create a container.

    There are 3 steps:

    1. Create the container.
    2. Configure the container.
    3. Install Pi-hole in the container.

    Create the container

    All …

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  • Using Cloudflare as a DDNS with UniFi (2025 update)

    calendar July 3, 2025 nav_categories Tech nav_categories Networking nav_tags cloudflare nav_tags dns nav_tags ddns nav_tags unifi nav_tags ubiquiti nav_tags udm nav_tags udm pro

    Configuring a Dynamic Domain Name Service (DDNS) on Ubiquiti's UniFi network manager is easy, if you use on of the configured providers that show up in the drop-down service.

    I had recently upgraded to UnifiOS version 4.3.6, and finally Cloudflare exists as a selectable entry.

    If you are running UDM version under …

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  • Capturing DNS rcodes using tcpdump

    calendar August 8, 2022 nav_categories Tech nav_categories Networking nav_tags tcpdump nav_tags packet capture nav_tags dns nav_tags rcode nav_tags dns rcode

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  • Isolating IoT devices on Ubiquiti UniFi

    calendar April 9, 2022 nav_categories Tech nav_categories Hardware nav_categories Networking nav_tags iot nav_tags wireless nav_tags vlan nav_tags ssid nav_tags firewall nav_tags unifi nav_tags ubiquity nav_tags udm nav_tags udm pro

    These instructions/screenshots were from an UDM Pro running:

    UniFi OS UDM Pro 1.11.0 UniFi Network Application 7.0.23

    Why

    From the FBI field office in Portland:

    Your fridge and your laptop should not be on the same network.1

    If those cheap "smart" lightbulbs you bought off Amazon get compromised because of …

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  • Certbot with Cloudflare DNS using DNS-01 challenge in Docker

    calendar March 10, 2022 nav_categories Tech nav_categories Networking nav_tags dns nav_tags cloudflare nav_tags certbot nav_tags letsencrypt nav_tags docker nav_tags dns-01 challenge

    Let's Encrypt will issue you free SSL certificates, but you have to verify you control the domain, before they issue the certificates.

    The 2 major ways of proving control over the domain:

    1. Create a specific page on your webserver that they can reach.
    2. Create a temporary DNS TXT record.

    I went with option #2, as my web …

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  • Using Cloudflare as a DDNS with UniFi

    calendar March 1, 2022 nav_categories Tech nav_categories Networking nav_tags cloudflare nav_tags dns nav_tags ddns nav_tags unifi nav_tags ubiquiti nav_tags udm nav_tags udm pro

    Configuring a Dynamic Domain Name Service (DDNS) on Ubiquiti's UniFi network manager is easy, if you use on of the configured providers that show up in the drop-down service.

    I'd been using No-IP for a number of years, but decided to switch to Cloudflare as it was free, and given Cloudflare's reputation, reliable. …

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