Artikel über DNS

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…

Continue Reading How to split DNS DKIM records

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…

Continue Reading Hide your version of BIND

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.…

Continue Reading Clear DNS cache on a Mac

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…

Continue Reading Adding a DKIM record to your DNS