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Ingen reverse DNS lookup



Det ser ud til at vi har et par problemer med opsætningen af vores DNS.

Vi har håndterer selv primær DNS (BIND/RH6.0), mens vores ISP er
sekundær DNS.

Det ene problem er at det tilsyneladende ikke er muligt at lave et
omvendt DNS opslag (reverse DNS lookup) på vores ip-numre, f.eks.

------------------------------------------------------------
jupiter(martin) $ nslookup skydebanen.net
Server:  ns.dtu.dk
Address:  130.225.88.2

Non-authoritative answer:
Name:    skydebanen.net
Address:  195.54.87.170

jupiter(martin) $ nslookup 195.54.87.170
Server:  ns.dtu.dk
Address:  130.225.88.2

*** ns.dtu.dk can't find 195.54.87.170: Non-existent host/domain
------------------------------------------------------------

Formentlig er dette også forklaringen på at jeg i min qmail-log kan
finde følgende

Connected_to_212.107.32.145_but_greeting_failed.
/Remote_host_said:_553_Host_195.54.87.170_unknown_(No_DNS_name)._Service
_denied/

Jeg er ikke klar over hvorfor det ikke er muligt at lave et omvendt DNS
opslag, og vil derfor gerne høre om der er nogen som har nogle bud?

Et andet, og muligvis relateret, DNS-problem udmønter sig i vores
/var/log/named/general.log. Loggen er fyldt med beskeden

<timestamp> default: sysquery: findns error (NXDOMAIN) on
artemis.skydebanen.net?

Meddelsen optræder nogle gange i minuttet.

Vores named konfiguration ser ud som følgende:

------------------------------------------------------------
@               IN      SOA     artemis.skydebanen.net.
hostmaster.afrodite.skydebanen.net. (
                        2000022303 ; serial
                        3600 ; refresh
                        900 ; retry
                        1209600 ; expire
                        86400 ; default_ttl
                        )
                IN      MX      10 afrodite.skydebanen.net.
                IN      MX      20 fallback.mail.dk.uu.net.
                IN      NS      artemis.skydebanen.net.
                IN      NS      ns1.dk.uu.net.
                IN      TXT     "Domain for skydebanen.net"

afrodite        IN      A       195.54.87.170
mail            IN      CNAME   afrodite.skydebanen.net.
ftp             IN      CNAME   afrodite.skydebanen.net.
www             IN      CNAME   afrodite.skydebanen.net.
intra           IN      CNAME   afrodite.skydebanen.net.
proxy           IN      A       172.20.0.1
@               IN      A       195.54.87.170
------------------------------------------------------------

Er der en måde hvorpå man kan finde ud af hvad fejlmeddelelsen skyldes?

/Martin
_________________________________
Martin Pihl Jensen
E-post: sslug@sslug
Web: http://www.skydebanen.net



 
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