How to split DNS DKIM records
DNS TXT records do have a limitation. Strings must not be longer than 255 Bytes. This limitation can hurt you with SPF records or DKIM records. In this case you…
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Hide your version of BIND
To hide your version of bind, enter the following value to your named.conf version "[NONE]"; in the option section: options { directory "/var/lib/bind"; version "[NONE]"; }; Check the value with…
Clear DNS cache on a Mac
Every Mac caches resolved DNS queries. Sometimes you get entries which create problems. To get rid of them you have to options: reboot the machine. This is the bad one.…
How Do I Update The Root Hints Data File for BIND Named Server?
My local nameserver root zone file is outdated. It has no information about IPv6 and a root server recently changed its IP address. How do I update my root hints…
Adding a DKIM record to your DNS
Adding a DKIM record to your DNS is quite simple. First, your create a key pair with openssl: openssl genrsa -out private.key 1024 openssl rsa -in private.key -pubout -out public.key…