Luzifer / dns_check

dns_check is a small utility to check major DNS services for records of a FQDN without having to query them one-by-one.

Use cases:

Check whether the IP of your domain is consistent on all services
Check whether your DNS change is already live for users of those services
Have an automated check which tells you when something is not right

You can see the current table of nameservers oncluded on the build by browsing the nameservers.yaml file.

Usage

# ./dns_check --help
Usage of ./dns_check:
  -a, --assert=[]: Exit with exit code 2 when these DNS entries were not found
      --assert-threshold=100: If used with -a fail when not at least N percent of the nameservers had the expected result
  -f, --full-scan[=false]: Scan all nameservers included in this build
  -q, --quiet[=false]: Do not communicate by text, use only exit codes
  -s, --short[=true]: Use short notation (only when using assertion)
      --version[=false]: Print version and exit

Use case: I know the IP of my domain and want to check whether all services report that IP

# ./dns_check -a "188.40.126.69" A luzifer.io
[Level3] (209.244.0.3:53) ✓
[Level3] (209.244.0.4:53) ✓
[Verisign] (64.6.64.6:53) ✓
[Verisign] (64.6.65.6:53) ✓
[Google] (8.8.8.8:53) ✓
[Google] (8.8.4.4:53) ✓
[OpenDNS Home] (208.67.222.222:53) ✓
[OpenDNS Home] (208.67.220.220:53) ✓

Use case: Just tell me the IP of any domain

# ./dns_check A luzifer.io
[Google] (8.8.8.8:53)
 - 188.40.126.69
[Google] (8.8.4.4:53)
 - 188.40.126.69
[Level3] (209.244.0.3:53)
 - 188.40.126.69
[Level3] (209.244.0.4:53)
 - 188.40.126.69
[Verisign] (64.6.64.6:53)
 - 188.40.126.69
[Verisign] (64.6.65.6:53)
 - 188.40.126.69
[OpenDNS Home] (208.67.222.222:53)
 - 188.40.126.69
[OpenDNS Home] (208.67.220.220:53)
 - 188.40.126.69

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Luzifer / dns_check

Usage

1.8 KiB

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