Features

• IPv4 and IPv6 support (A and AAAA records in DNS)

• Traversing over CNAMEs to target A/AAAA records

• IP is marked as failed when it either timeouts (configurable in seconds) or returns defined HTTP code (for example 500, by default turned off)

• Dry run mode: Will not change the DynDNS recods. Outputs only curl commands instead.

• Will not delete IPs from DynDNS, when all the IPs in the dns record fail.

CLI

DynDNS credetials can be defined either by env variables, or as parameters.

# ddcheck --help

usage: ddcheck [-h] [-d] [-e ERROR_CODES] [-t TIMEOUT] [-D]
               [--dynect-customer DYNECT_CUSTOMER] [--dynect-user DYNECT_USER]
               [--dynect-password DYNECT_PASSWORD]
               URL [URL ...]

Run a ddcheck.

positional arguments:
  URL                   URL to check

optional arguments:
  -h, --help            show this help message and exit
  -d, --debug           Debug logging on
  -e ERROR_CODES, --error-codes ERROR_CODES
                        HTTP codes considered as non-OK
  -t TIMEOUT, --timeout TIMEOUT
                        URL timeout
  -D, --dry-run         Do not really update the dyndns. Just print records to
                        delete.
  --dynect-customer DYNECT_CUSTOMER
                        Customer name in DynEct (defaults to
                        DYNECT_CUSTOMER_NAME env variable)
  --dynect-user DYNECT_USER
                        Username in DynEct (defaults to DYNECT_USER_NAME env
                        variable)
  --dynect-password DYNECT_PASSWORD
                        Password in DynEct (defaults to DYNECT_PASSWORD env
                        variable)

export DYNECT_PASSWORD=aaa
export DYNECT_USER_NAME=bbb
export DYNECT_CUSTOMER_NAME=ccc
ddcheck -e 500 --debug --dry-run http://root.example1.com/health/ http://cname.example2.com/check/

Python