contrib/reverse-dns/README

   1 The script reads stdin and replaces all IP addresses with names before
   2 outputting it again. IPs from private networks are reverse looked  up
   3 via dns. Other IP adresses are searched for in the dnsmasq query log.
   4 This gives names (CNAMEs if I understand DNS correctly) that are closer
   5 to the name the client originally asked for then the names obtained by
   6 reverse lookup. Just run
   7
   8 netstat -n -4 | ./reverse_replace.sh
   9
  10 to see what it does. It needs
  11
  12 log-queries
  13 log-facility=/var/log/dnsmasq.log
  14
  15 in the dnsmasq configuration.
  16
  17 The script runs on debian (with ash installed) and on busybox.
  18