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visibility

DNS Sinkhole

Two weeks ago I wrote blog post about importance of DNS visibility – https://letsnet.eu/dns-over-tls-dns-over-https/. Let’s assume that DNS traffic is properly inspected, queries to malicious domains can be seen and you have capabilities to identify DNS tunneling and to block it as well. Is blocking a proper action to malicious DNS queries? Not really, let’s… Read More »DNS Sinkhole

DNS over TLS/DNS over HTTPS

Visibility, visibility and visibility. Crucial and basic thing to secure infrastructure, if you cannot see something, than you cannot protect as well. DNS protocol is quite challenging from security perspective, it’s like phone book of Internet and cannot be blocked. DNS server has to have communications with external DNS server and that is enough to… Read More »DNS over TLS/DNS over HTTPS