Namecheap-DDNS-Update

Bash script to update the your namecheap.com ddns host. Tested under Macintosh OSX 10.9.4 and RHES 7.0

Getting Started:

1. Create a A record on namecheap.com for the host you will be updating. Hint: you can update more then one host, i.e.: @ and www. You may also wish to keep a low TTL value for these hosts, i.e: 60-120
2. Enable DDNS by Modifing your domain and clicking on the Dynamic DNS entry on the left hand menu. Write down the Password string that is assigned to this domain.
3. Edit the section of the script:

# >>>>>>>>>>>>>>>>>>>>>> Start of Configuration >>>>>>>>>>>>>>>>>>>>>>
#
DOMAIN='mydomain.tld'
PASSWORD=''
HOSTS=('myhost1' 'myhost2')
EMAIL=''
CACHED_IP_FILE='/var/tmp/namecheap_ddns_ip_'
#
# <<<<<<<<<<<<<<<<<<<<<< End of Configuration <<<<<<<<<<<<<<<<<<<<<<

Configuration:

• DOMAIN string - name of domain to update
• PASSWORD string - the password given from Namecheap.com
• HOSTS array of strings - the array of hosts to update
• EMAIL string - if exists, then an email will be generated on error or change of IP address
• CACHED_IP_FILE string - path to file holding the last set IP address

Example Configuration (one host):

DOMAIN='kentswidget.com'
PASSWORD='2138530d9dea58fa'
HOSTS=( devserver )
EMAIL='ddns_notices@kentswidget.com'
CACHED_IP_FILE='/var/tmp/namecheap_ddns_ip_'

Example Configuration (three hosts):

DOMAIN='kentswidget.com'
PASSWORD='2138530d9dea58fa'
HOSTS=('@' 'www' 'devserver')
EMAIL='ddns_notices@kentswidget.com'
CACHED_IP_FILE='/var/tmp/namecheap_ddns_ip_'

Usage:

For these examples I will be saving this script in ~/kent/scripts/NamecheapDdnsUpdate.sh

• Command line (runs one time)

  1. Open Terminal
  2. Enter the command $bash ~/kent/scripts/NamecheapDdnsUpdate.sh

• Finder (runs one time)

  1. Open finder and locate NamecheapDdnsUpdate.sh
  2. Double-click on file

• Cron (runs every hour)

  1. Open Terminal
  2. Enter the command $crontab -e
  3. Add a line: @hourly ~/kent/scripts/NamecheapDdnsUpdate.sh

Ignore the script - one liner

Fill in the domain, password, and host for your account

• curl line
  • $curl -s https://dynamicdns.park-your-domain.com/update?domain=my.domain.com&password=33598fgc98a1dbcd&host=myhost