Hi If you have control over all zones, you could also pre-store the results of your search in DNS :)
For all CNAME records, make e.g. a TXT record with the reverse result : (TXT is maybe not the better record type...which ones (for specialists)) For each : a-name IN A 1.2.3.4 an-alias IN CNAME a-name Just add : a-name IN TXT an-alias and make more than one TXT records for each cname pointing to the same record ... a-name IN TXT another-alias best regards Philippe From: bind-users-bounces+philippe.simonet=swisscom....@lists.isc.org [mailto:bind-users-bounces+philippe.simonet=swisscom....@lists.isc.org] On Behalf Of Stacey Jonathan Marshall Sent: mardi 9 novembre 2010 16:53 To: bind-users@lists.isc.org Subject: Re: How to get easily (from a script) all CNAME of a A record? On 09/11/2010 14:14, Michelle Konzack wrote: Hello Matus UHLAR - fantomas, Am 2010-11-09 14:13:47, hacktest Du folgendes herunter: I am not sure whether dnswalk over whole internet can do that, but on your I will try it... server you can either run recursive grep over named data directory, or dump the named dsatabase and grep it... This is what I currently do... ----[ '/usr/sbin/get_hosts_in cname' ]---------------------------------- #!/bin/sh QUERY="$1" for FILE in $(cd /etc/bind && ls *.signed) do grep --regexp=" IN CNAME .*${QUERY}" /etc/bind/${FILE} 2>/dev/null |cut -d ' ' -f1 |sed 's|.$||' done ------------------------------------------------------------------------ ...and it is to slow do to more then 80.000 Zones (they have to be greped all) number of VHosts. Oh, it is now time to use "xargs", because I saw today, that I hit the limits for "ls". :-D Following is working: cd /etc/bind && ls but not: cd /etc/bind && ls * or cd /etc/bind && ls *.signed and the OSes are called Linux and BSD... WTF? It seems that a commandline can not have more then 31.000 characters. (no not options but total lenght) Thanks, Greetings and nice Day/Evening Michelle Konzack The asterisk causes the shell to expand the names and run ls with them as a single command, so in effect you have "ls file1 file2 file3 ...". Try the following instead: cd /etc/bind for FILE in *.signed do grep --regexp=" IN CNAME .*${QUERY}" ${FILE} 2>/dev/null |cut -d ' ' -f1 |sed 's|.$||' done It might still have the same issue, but worth a go. I assume the command length is also why your not simply running "grep -h <expression> *.signed"? Stace _______________________________________________ bind-users mailing list bind-users@lists.isc.org<mailto:bind-users@lists.isc.org> https://lists.isc.org/mailman/listinfo/bind-users
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