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dnswalk - a useful DNS tool
1 January 1999
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see also nslint. When I was adding some new virtual domains, I had some trouble figuring out why only I
could see the websites. One of the tools I used to solve this problem was dnswalk. |
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Installation
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| The first step was to install dnswalk from the ports. I followed the
instructions found in the FreeBSD handbook
for compiling port
from CDROM. You may want to see compiling ports from
the internet. In reality, here's what I did:
cd /usr/ports/net/dnswalk
make install
Note that I have the entire ports tree on disk already. |
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Use
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For complete details on dnswalk, see man dnswalk. See below
for samples. Remember to include the "." at the end of the domain
name. Otherwise you'll get something like this:
su-2.02# dnswalk freebsdrocks.com
Usage: dnswalk domain
domain MUST end with a '.'
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Samples
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This section contains some samples of the first domains I could think of.
su-2.02# dnswalk freebsd.org.
Checking freebsd.org.
Getting zone transfer of freebsd.org. from ns1.iafrica.com...done.
SOA=implode.root.com contact=hostmaster.freebsd.org
WARN: www4.freebsd.org CNAME www.se.freebsd.org: CNAME
(to freebsdwww.ludd.luth.se)
WARN: ns.lv.freebsd.org A 195.114.57.82: no PTR record
WARN: ctm.freebsd.org CNAME ftp.uni-trier.de: CNAME
(to rzbsdi01.uni-trier.de)
WARN: ns.br.FreeBSD.org A 143.106.13.62: no PTR record
BAD: de.freebsd.org NS dalx1.nacamar.net: unknown host
WARN: irc2.freebsd.org CNAME va.i-Plus.net: unknown host
WARN: irc3.freebsd.org CNAME irc.nocturnal.net: CNAME
(to nocturnal.net)
WARN: ns.th.freebsd.org A 203.154.230.20: no PTR record
BAD: eu.freebsd.org NS dalx1.nacamar.net: unknown host
BAD: eu.freebsd.org NS server.zsb.th-darmstadt.de: unknown host
WARN: cvsup3.freebsd.org CNAME freebsd.lcs.mit.edu: CNAME
(to xyz.lcs.mit.edu)
WARN: cvsup4.freebsd.org CNAME mirrors.rcn.com: CNAME
(to gregory.dev.erols.net)
WARN: ftp3.freebsd.org CNAME ftp.cslab.vt.edu: CNAME
(to macadamia.cslab.vt.edu)
WARN: ftp6.freebsd.org CNAME mirrors.rcn.com: CNAME
(to gregory.dev.erols.net)
WARN: ampere.freebsd.org A 204.216.27.20: no PTR record
0 failures, 12 warnings, 3 errors.
su-2.02# dnswalk daemonnews.org.
Checking daemonnews.org.
Getting zone transfer of daemonnews.org. from ns.hyp.net...done.
SOA=ns.hyp.net contact=hostmaster.hypnotech.com
WARN: www.cn.daemonnews.org A 202.96.211.193: no PTR record
WARN: www3.daemonnews.org CNAME www.vmunix.com: CNAME
(to vnode.vmunix.com)
0 failures, 2 warnings, 0 errors.
su-2.02# dnswalk freebsdrocks.com.
Checking freebsdrocks.com.
Getting zone transfer of freebsdrocks.com. from
newjersey.playgal.com...failed
FAIL: Zone transfer of freebsdrocks.com. from newjersey.playgal.com
failed: couldn't connect
Getting zone transfer of freebsdrocks.com. from
santaclara.playgal.com...done.
SOA=freebsdrocks.com contact=ken.imgmkt.com
WARN: freebsdrocks.com A 209.185.245.59: no PTR record
WARN: ken.freebsdrocks.com A 192.168.60.21: no PTR record
WARN: www.freebsdrocks.com A 209.185.245.59: no PTR record
1 failures, 3 warnings, 0 errors.
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