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cname-check

Check if the subdomains have cnames to the same tld or 3rd party service

Usage:

bash cname.sh subdomain_file

or

chmod +x cname.sh ./cname.sh subdomain_file

The output will be 3 different files:

  1. no_cname: Subdomains with No CNAMEs
  2. host_match: Subdomains with same tld as CNAME, ideally redirects to same host
  3. cname_out: Subdomains pointing to 3rd party services/CNAMEs