Point your router at TechDDNS

pfSense

Services → Dynamic DNS → Add. Use Custom (there is no separate hostname field).

1. Service Type: Custom
2. Interface to monitor: WAN
3. Username: your TechDDNS account username
4. Password: hostname update password
5. Update URL (put your real FQDN in place of the example):

https://techddns.com/update?hostname=hostname.techddns.com&myip=%i

Some builds use <ipaddr> instead of %i. Use HTTPS on port 443 (not port 5000).

Save → Force Update. Status should show good … or nochg ….

OPNsense

Services → Dynamic DNS → Settings → Add.

1. Service: Custom or No-IP if available
2. Interface: WAN
3. Hostname: hostname.techddns.com
4. Username / Password: account username + update password
5. If Custom, Check IP / Force IP and set URL:

https://techddns.com/update?hostname=hostname.techddns.com&myip=%IP%

Placeholder names vary by OPNsense version — use the WAN IP token shown in the UI help text.

ASUS (Merlin / stock)

WAN → DDNS (or Adaptive QoS / Internet → DDNS on some firmwares).

1. Enable DDNS Client
2. Server: No-IP if listed, otherwise Custom / HTTPS
3. Host Name: hostname.techddns.com
4. User Name / Password / Key: account username + update password
5. If Custom URL is offered:

https://techddns.com/update?hostname=hostname.techddns.com&myip=

ASUS often appends the WAN IP automatically when the URL ends with myip=.

TP-Link (Archer / Omada gateway)

Omada Controller: Configuration → Device Config → Dynamic DNS. Archer: Advanced → Network → Dynamic DNS.

1. Service Provider: Custom (Omada’s NO-IP preset talks to No-IP’s cloud, not TechDDNS)
2. Interface: WAN1 (or your WAN)
3. Username: TechDDNS account username
4. Password: that hostname’s update password (dashboard / Settings → Copy — not your login password)
5. Domain Name: hostname.techddns.com
6. Update-URL (paste exactly; Omada requires these placeholders):

https://techddns.com/update?hostname=[DOMAIN]&myip=[IP]&username=[USERNAME]&password=[PASSWORD]

Also valid (No-IP style; avoid if your update password has @ : # or /):

https://[USERNAME]:[PASSWORD]@techddns.com/nic/update?hostname=[DOMAIN]&myip=[IP]

Apply → Enable. Status should leave Disconnect. Check Admin → Activity for good / nochg (not badauth).

NETGEAR

Advanced → Dynamic DNS (or Settings → Advanced Setup → Dynamic DNS).

1. Use a Dynamic DNS Service: Yes
2. Service Provider: No-IP (preferred) or Custom if present
3. Host Name: hostname.techddns.com
4. User Name / Password: account username + update password

UniFi / Ubiquiti

UniFi OS / Network application → Settings → Internet → WAN → Dynamic DNS (or Teleport / Advanced).

1. Create Dynamic DNS
2. Service: noip or dyndns / custom
3. Hostname: hostname.techddns.com
4. Username / Password: account username + update password
5. Server (if asked): techddns.com or https://techddns.com/update

On some UniFi versions the “Server” field is only the host (techddns.com); the path is fixed to No-IP style.

Synology DSM

Control Panel → External Access → DDNS → Add.

1. Service provider: No-IP.com or Customize
2. Hostname: hostname.techddns.com
3. Username / Password: account username + update password
4. If Customize, set provider URL to:

https://techddns.com/update?hostname=__HOSTNAME__&myip=__MYIP__

Synology substitutes __HOSTNAME__ and __MYIP__ automatically.

ddclient / Linux

Works on Raspberry Pi, Ubuntu, Proxmox LXC, etc.

protocol=noip
server=techddns.com
login=YOUR_USERNAME
password=YOUR_UPDATE_PASSWORD
hostname.techddns.com

Or with inadyn:

system = default@no-ip.com
username = YOUR_USERNAME
password = YOUR_UPDATE_PASSWORD
hostname = hostname.techddns.com
ddns-server = techddns.com
ddns-path = /update?hostname=%h&myip=%i

Windows

Use the branded TechDDNS Client (No-IP-style DUC), Task Scheduler + script, or curl.

TechDDNS Client (recommended)

Download Windows Client

1. Download and run TechDDNS-Client.exe (or install via the included installer script from the project)
2. Enter your account username and hostname update password
3. Click Refresh and pick a hostname from the list
4. Save → Start

Optional: enable Start with Windows and Start minimized. Closing the window while running can send it to the system tray.

curl / Task Scheduler

curl -sS -u "YOUR_USERNAME:YOUR_UPDATE_PASSWORD" ^
  "https://techddns.com/update?hostname=hostname.techddns.com"

Omit myip to let the server detect your public IP from the connection (via NPM X-Real-IP / X-Forwarded-For).

curl / cron

curl -sS -u "YOUR_USERNAME:YOUR_UPDATE_PASSWORD" \
  "https://techddns.com/update?hostname=hostname.techddns.com&myip=$(curl -4 -fsS https://api.ipify.org)"

Run every 5–15 minutes from cron, or only when the WAN IP changes.

Generic / “No-IP compatible” routers

If the router only lists DynDNS or No-IP:

1. Choose No-IP
2. Enter hostname, username, and update password as above
3. If there is a Server / Provider address field, set it to techddns.com
4. If the server is hard-coded to dynupdate.no-ip.com and cannot be changed, use Custom URL mode or a LAN device running ddclient instead

API reference

GET https://techddns.com/update?hostname=hostname.techddns.com&myip=203.0.113.40
Authorization: Basic base64(username:update_password)

Private (RFC1918) addresses are rejected so a LAN IP is never published by mistake.