Namesilo DDNS CLI

namesilo_ddns_cli is a command line tool for Namesilo DDNS, which is written in Bash depending on wget/curl only.

It is designed mainly to reduce dependences and system load as much as possible. Therefore, light-weight Linux distributions are especially appropriate to use it, like Raspberry, Openwrt, Merlin, Unraid, DSM, QTS...

Version 2 Upgrade (2020.11)

• Rewrite based on Bash builtin commands, and remove all other dependences except for wget or curl.
• No API request needed for normal running by using cache in log, and possible for IP-checking with high frequency.
• Create running log with automatic compression and length control.
• Enable command-line support.

Feathers

• Multi-Domains Support
• IPv4 & IPv6 Support
• Load Balancing for IP-Check
• Minimal API requests by Cache
• Logging with Length Control

Requirements

• Necessary: wget or curl
• Optional: date, sleep

Tested System

• DSM 6.2.3
• Ubuntu 20.04.1 LTS (WSL2)
• EdgeRouter X v2.0.8-hotfix.1 (EdgeOS based on Debian 9)

Usage

Usage: namesilo_ddns.sh <command> ... [parameters ...]
Commands:
  --help                   Show this help message
  --version                Show version info
  --key, -k <apikey>       Specify API key of Namesilo
  --host, -h <host>        Add a host to filter current records
  --ipv4 <ipaddr>          Only update A records 
                             with specified IP (default: auto)
  --ipv6 <ipaddr>          Only update AAAA records 
                             with specified IP (default: auto)
  --force-fetch            Forcely fetch records ignoring cache
  --force-update           Forcely update IP even if not change

Example:
  namesilo_ddns.sh -k c40031261ee449037a4b44b1 \
      -h yourdomain1.tld \
      -h subdomain1.yourdomain1.tld \
      -h subdomain2.yourdomain2.tld

Exit codes:
    0    All hosts have been updated successful.
    1    Occur error during preparing parameters.
    2    Occur error during fetching & updating records.

Tips:
  Recommand to force fetching records or delete cache in log,
  if one of your DNS records have been modified in other ways.

You can also edit the configs and settings in the head of script.

Applications

Regular Running for common Linux

1. SSH to your device , and place namesilo_ddns.sh into somewhere, like /opt/ddns/. (Note: For EdgeOS, the script should be placed in /config/scripts/)

2. Make sure your permissions of destination and script:

chmod u+w /opt/ddns
chmod u+x /opt/ddns/namesilo_ddns.sh

3. Edit crontab config:

crontab -e

4. Insert and save this line (updating the two hosts every 5 minutes):

*/5 * * * *  /opt/ddns/namesilo_ddns.sh -k c40031261ee449037a4b44b1 -h subdomain1.yourdomain1.tld -h subdomain2.yourdomain2.tld

Regular Running for Synology DSM

1. Place namesilo_ddns.sh into somewhere in your NAS, e.g. /homes/<yourname>/ddns/.

2. Start Control Panel, click Advanced Mode, open Task Scheduler.

3. Access Create --> Scheduled Task --> User-defined script.

4. Toggle to Schedule tab, set running every 5 minutes daily.

5. Toggle to Task Settings tab, in Run command input edited command below, e.g.

/var/services/homes/<yourname>/ddns/namesilo_ddns.sh -k c40031261ee449037a4b44b1 -h subdomain1.yourdomain1.tld -h subdomain2.yourdomain2.tld

6. If you check out Send run details by email and ... only when ... terminates abnormally, you will receive mail when occur error.

Use in Asuswrt-Merlin

Why use this solution? If you want to

• DDNS multiple hosts

• DDNS IPv6 hosts

• reduce API requests greatly

• check updating log

Setup

1. Edit the API key and hosts in this script, and save as ddns-start.

#! /bin/bash

./namesilo_ddns.sh -k c40031261ee449037a4b44b1 \
      -h subdomain1.yourdomain1.tld \
      -h subdomain2.yourdomain2.tld \
      --ipv4 "$1"
      --ipv6 auto

if [ $? -eq 0 ]; then
  /sbin/ddns_custom_updated 1
else
  /sbin/ddns_custom_updated 0
fi

2. SSH to your router and place ddns-start and namesilo_ddns.sh under /jffs/scripts/.

3. Make sure your permissions of destination and script:

chmod u+w /jffs/scripts
chmod u+x /jffs/scripts/namesilo_ddns.sh
chmod u+x /jffs/scripts/ddns-start

4. Log into the router web UI:
   • Go to Advanced Settings > WAN > DDNS
   • Set Server to Custom
   • Click the Apply button

• Reference