Re: Problem with NetBSd 5.1.2 / gethostbyname / nsswitch.conf or bind resolving chain of multiple cnames

[matthew sporleder <msporleder%gmail.com@localhost>]

On Sun, Sep 9, 2012 at 5:43 AM, thilo <thilo%nispuk.com@localhost> wrote:
> Hello everyone,
>
> I have an issue with my name resolving and I am not sure where the
> problem lies:
>
> On my server I can resolve an address with multiple cnames via nslookup
> to my local bind server.
> The clibrary gethostbyname  fails the lookup if the cname chain is
> greater than 2.
> I cannot seem to find anywhere a switch/define that would limit the
> number of recursive lookups.
>
> Changing the order in /etc/nsswitch.conf from     "files dns"  -> "dns
> file" changes the herror output from
> "Unknown server error" -> "Unknown host".
> Interesting enough windows and linux clients in my network do not have
> this problem, but another netbsd box does too.
>
> Does someone know what is wrong in my configuration?
> Thanks for the help
>  thilo
>
>
> == log from various tools  ==
> -bash-4.2$ nslookup dradio_mp3_dkultur_m.akacast.akamaistream.net
> Server:         127.0.0.1
> Address:        127.0.0.1#53
>
> Non-authoritative answer:
> dradio_mp3_dkultur_m.akacast.akamaistream.net   canonical name =
> out.icecast.akadns.net.
> out.icecast.akadns.net  canonical name = eu.ic.akadns.net.
> eu.ic.akadns.net        canonical name = edge13647.icecast.akadns.net.
> Name:   edge13647.icecast.akadns.net
> Address: 195.27.154.158
>
> ====== PING FIRST HOST==================================
> -bash-4.2$ ping -c 1  dradio_mp3_dkultur_m.akacast.akamaistream.net
> ping: Cannot resolve "dradio_mp3_dkultur_m.akacast.akamaistream.net"
> (Unknown host)
> ====== PING SECOND HOST==================================
> -bash-4.2$ ping -c 1 out.icecast.akadns.net
> PING edge14152.icecast.akadns.net (195.10.36.180): 56 data bytes
> 64 bytes from 195.10.36.180: icmp_seq=0 ttl=59 time=63.583 ms
>
> ----edge14152.icecast.akadns.net PING Statistics----
> 1 packets transmitted, 1 packets received, 0.0% packet loss
> round-trip min/avg/max/stddev = 63.583/63.583/63.583/0.000 ms
> =========UNAME=======================================
> -bash-4.2$ uname -a
> NetBSD maggi 5.1.2 NetBSD 5.1.2 (GENERIC) #0: Thu Feb  2 12:12:28 UTC
> 2012
> builds%b7.netbsd.org@localhost:/home/builds/ab/netbsd-5-1-2-RELEASE/amd64/201202021012Z-obj/home/builds/ab/netbsd-5-1-2-RELEASE/src/sys/arch/amd64/compile/GENERIC
> amd64
>
> ============= NAMED versions =============
> I tried bind 9.7.3 and 9.9.1 :
> -bash-4.2$ /usr/sbin/named -v
> BIND 9.7.3-P3
> -bash-4.2$  /usr/pkg/sbin/named -v
> BIND 9.9.1-P2
> -bash-4.2$
>
> ================================


This is true on my box too.

getent hosts dradio_mp3_dkultur_m.akacast.akamaistream.net