initial commit

pubdns.sh

+#!/bin/sh
+
+# query well known public dns resolvers
+# and my own dns resolvers
+#
+# 2016-05-15 arsen.stasic@univie.ac.at initial setup
+# 2016-06-08 adding my own dns resolvers
+# 2016-06-27 adding some comments before pushing to git ;-)
+#
+#dyndns unbound: https://ripe72.ripe.net/archives/video/231/ 6:40
+#ipv4 for dns-oarc is not working
+#184.105.193.73#bind.odvr.dns-oarc.net
+#184.105.193.74#unbound.odvr.dns-oarc.net
+
+
+# define max length for pretty-printing output
+MAXLEN='resolver1.dyndnsinternetguide.com  '
+
+# list of public dns resolvers
+PUBRESOLVERS='
+8.8.8.8[google-public-dns-a.google.com]
+216.146.35.35[resolver1.dyndnsinternetguide.com]
+208.67.222.222[resolver1.opendns.com]
+156.154.71.1[rdns2.ultradns.net]
+4.2.2.2[b.resolvers.Level3.net]
+2620:ff:c000:0:1:0:64:20[bind.odvr.dns-oarc.net]
+2620:ff:c000:0:1:0:64:21[unbound.odvr.dns-oarc.net]
+37.235.1.177[resolver2.freedns.zone]
+64.6.64.6[recpubns1.nstld.net]'
+
+# my own dns resolvers
+MYRESOLVERS='
+127.0.0.1[bind-localhost]
+127.0.0.2[unbound-localhost]
+127.0.0.3[knot-resolver-localhost]
+127.0.0.4[pdns-recursor-localhost]
+'
+
+HOSTNAME=$( hostname )
+MYPC='pcas'
+RES=''
+
+# test if I'm unsing my own PC, because I multiple resolvers installed
+if [ "$HOSTNAME" = "$MYPC" ]; then
+	RES="$PUBRESOLVERS $MYRESOLVERS"
+else
+	RES=$PUBRESOLVERS
+fi
+
+# test if dig is available
+command -v dig >/dev/null 2>&1 || { echo "dig is required but not installed. Aborting." >&2; exit 1; }
+
+for i in $RES ; do
+	# echo "\t$i"
+	RES=$( echo $i | awk -F'[' '{ print $1 }' )
+	NAM=$( echo $i | awk -F'[' '{ print $2 }' )
+	LEN=${#NAM};
+	# echo "length of $RES: $LEN";
+	DIF=$( expr ${#MAXLEN} - ${LEN} );
+	echo -n "$(tput setaf 3)${NAM}$(tput sgr0) ";
+	printf '.%.0s' $(seq 1 $DIF);
+	#echo $RES
+	dig @$RES $*
+done