checkdns.sh

#!/bin/sh

sites="/root/url_list"
fdnss="/root/fdnss"
[ -f $fdnss ] && /bin/rm $fdnss
dnss=`cat /etc/resolv.conf | egrep '^nameserver' | egrep -v '127.0.0.1|8.8.8.8' | awk '{print $2}' | sort -u >> /root/fdnss`

for site in `cat $sites`; do
    g_dns=`dig +short $site 8.8.8.8 | head -1`
    for dns in `cat $fdnss`; do
        s_dns=`dig +short +tries=1 +time=3 $site $dns | head -1`
        if [ "$g_dns" != "$s_dns" ]; then
            echo "$site no $dns NOT ok"
            echo "ip $g_dns - ip $s_dns"
        else
            echo "$site no $dns ok"
        fi
    done
    echo ""
done