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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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