Reverzni DNS - jak overit ?

[Petr Soucek]

Jen bych k tomuto tematu doplnil, ze v RFC1912 (v tomto vychazejici z
RFC1034), ktera se zabyva obvyklymi chybymi v konfiguraci DNS se pise v
2.1:

"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."

Tedy i zde se pise o tom, co je praktikovano na ftp.linux.cz.

A dalse se pise:

"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.  If a host
is multi-homed, (more than one IP address) make sure that all IP
addresses have a corresponding PTR record (not just the first one).
Failure to have matching PTR and A records can cause loss of Internet
services similar to not being registered in the DNS at all.  Also, PTR
records must point back to a valid A record, not a alias defined by a
CNAME."

No a tohle je primo o tom pripadu, kterym tenhle thread zacal.

Tech RFC o DNS je hodne, nedodelany seznam mam na
http://www.ryston.cz/petr/dns.html

Zdravi

Petr Soucek