For my personal mail server.... i find about 60% of all spam gets dropped if you set your mailserver to verify for FCRDNS . (basically where their forward dns does not match their reverse dns (PTR) en

Make sure this is actually working. I noticed, for instance, that DNSWL is set up to return false negatives when queried too many times by a given IP. So, if you just query it via your provider's DNS,

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I'm using Cloudflare DNS for one domain name that is not critical for me. I hesitate to migrate important domain names to Cloudflare. What bothers me most is the likely lack of encryption between the

Yes, it is required to use Cloudflare DNS to use their DMARC features. So you have to add your website/domain to CF first.

TIL: To check the system's DNS configuration, use the resolv.conf file:

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curl --resolve hazi.ro:443:\[2a0e:8f02:f04f::3\] -v https://hazi.ro* Added hazi.ro:443:[2a0e:8f02:f04f::3] to DNS cache* Hostname hazi.ro was found in DNS cache* Trying 2a0e:8f02:f04f::3:443...

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I use gDNSd to geocast my web servers, this also has auto failover so I don't go down. DNS failover is not a perfect solution, but I have over 1,000 days uptime on the website monitoring so it seems

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Do you run standard DNS servers, or something like Pi-Hole?

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DNS servers, web servers, mail servers with a relay via mxroute for outbound mail. Some other things, but that covers most of the main things

I don't use Opera but try to check all the options where an an-blocker might be enabled. Then disable every one, and keep only one active, like a DNS-level ad-blocker. These browsers come with their o

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I will use it for secondary DNS and backup

https://controld.com/free-dns

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