• https://dnsinstitute.com/documentation/dnssec-guide/dnssec-guide.html
• https://www.cloudflare.com/de-de/dns/dnssec/how-dnssec-works/
• Overview of DNSSEC
• https://metebalci.com/blog/a-short-practical-tutorial-of-dig-dns-and-dnssec/
• https://www.denic.de/wissen/dnssec

• dig example.com. +multiline +dnssec # get A and RESIG Record for domain
  dig @1.1.1.1 example.com. +multiline +dnssec +trace # trace funktioniert nicht mehr mit 8.8.8.8

• https://dnsviz.net/ – Visualisiert den (DNSSEC)-Status einer Domain
• https://dnssec-debugger.verisignlabs.com/
• https://internet.nl/connection
• Überprüfung von DS und DNSKEY einer Domain:

  dig @8.8.8.8 example.com. DS  # KSK key-id must match between DS and DNSKEY
  dig @8.8.8.8 example.com. DNSKEY +dnssec +cd +multiline  # multiline prints key algorithm and id

• https://wander.science/projects/dns/dnssec-resolver-test/
• https://cmdns.dev.dns-oarc.net/

• dig sigok.ippacket.stream #should return an A-Record
  dig sigfail.ippacket.stream # should return a SERVFAIL
  dig sigfail.ippacket.stream +cd #(check disabled - should return an A-Record)

Infos zum Testen:

• https://developers.cloudflare.com/dns/dnssec/troubleshooting/
• How to test and validate DNSSEC using dig
• https://serverfault.com/questions/154016/querying-and-verifying-dnssec
• https://dnsinstitute.com/documentation/dnssec-guide/ch03s02.html
• https://learn.microsoft.com/en-us/windows-server/networking/dns/validate-dnssec-responses

• https://kb.isc.org/docs/aa-00994 – Using Response Rate Limiting
• BSI - Offene Resolver
• https://www.cymru.com/Documents/secure-bind-template.html
• https://hackviser.com/tactics/hardening/bind9

• https://dnsinstitute.com/documentation/dnssec-guide/ch05s04.html
• https://developers.cloudflare.com/dns/dnssec/troubleshooting/