Dynamic DNS updater for Works on all POSIXish systems (Mac, Linux, Docker, BSD, etc).

To update or switch versions, run webi (or @v1.0.3, @beta, etc).


These are the files / directories that are created and/or modified with this install:


Cheat Sheet ( is the best Dynamic DNS client to date. Not only does it have some nice sub commands and work on all Posix systems, but it can also register itself with your system launcher - systemd on Linux and launchctl on macOS.

Paste your token from to start.

# auth <subdomain>
# auth foobar # do NOT include ''

Set to launch on login (Mac) or on boot (Linux)

# enable <subdomain> enable foobar


Use -v to filter out all matches so that only non-matches are left.

USAGE <subcommand> [arguments...]

    myip                         - show this device's ip(s)
    ip <subdomain>               - show subdomain's ip(s)

    list                         - show subdomains
    auth <subdomain>             - add Duck DNS token
    update <subdomain>           - update subdomain to device ip
    set <subdomain> <ip> [ipv6]  - set ipv4 and/or ipv6 explicitly
    clear <subdomain>            - unset ip(s)
    run <subdomain>              - check ip and update every 5m
    enable <subdomain>           - enable on boot (Linux) or login (macOS)
    disable <subdomain>          - disable on boot or login

    help                         - show this menu
    version                      - show version and exit

How to check your current IP address myip

This is the same as

curl -fsSL ''
curl -fsSL ''

How to check your domain's current DNS records ip foobar

This is the same as

dig +short A
dig +short AAAA

How to manually set your domain's DNS records set foobar ::1


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