Am 06.10.2016 um 11:04 schrieb Magnus Wagner:
http://www.faqs.org/rfcs/rfc1912.html 2.1 Inconsistent, Missing, or Bad Data
Every Internet-reachable host should have a name. The consequences of this are becoming more and more obvious. Many services available on the Internet will not talk to you if you aren't correctly registered in the DNS.
Make sure your PTR and A records match. For every IP address, there should be a matching PTR record in the in-addr.arpa domain.
man beachte das "should"
Macht man's nicht braucht man einen guten Grund(RFC2119). 3. SHOULD This word, or the adjective "RECOMMENDED", mean that there may exist valid reasons in particular circumstances to ignore a particular item, but the full implications must be understood and carefully weighed before choosing a different course.
Welcher sollte das sein?
Magnus