Re: /etc/hosts completely ignored

From: Roberto Nunnari <nunnari_at_die.supsi.ch>
Date: Wed, 28 May 2003 19:24:06 +0200
Dear Fred,

if I call

-bash-2.05b# host localhost.
localhost has address 127.0.0.1

but that's only because the dns specified in resolv.conf
answers the query with its own 'localhost' entry. Look:

-bash-2.05b# host -d -t A localhost.
;; res_nmkquery(QUERY, localhost, IN, A)
;; res_send()
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 64429
;; flags: rd; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0
;;      localhost, type = A, class = IN
;; Querying server (# 1) address = 195.190.166.166
;; new DG socket
;; got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 64429
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0
;;      localhost, type = A, class = IN
localhost.              1D IN A         127.0.0.1
rcode = 0 (Success), ancount=1
localhost has address 127.0.0.1


its a remote dns that answers the query.. but naturally it doesn't
know about localhost in a not existant domain as
localhost.noonlights.net that I use for my private network


-bash-2.05b# host -d -t A localhost.noonlights.net.
;; res_nmkquery(QUERY, localhost.noonlights.net, IN, A)
;; res_send()
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 20386
;; flags: rd; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0
;;      localhost.noonlights.net, type = A, class = IN
;; Querying server (# 1) address = 195.190.166.166
;; new DG socket
;; got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 20386
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0
;;      localhost.noonlights.net, type = A, class = IN
net.                    2D IN SOA       a.gtld-servers.net. 
nstld.verisign-grs.com. (
                                         2003052800      ; serial
                                         30M             ; refresh
                                         15M             ; retry
                                         1W              ; expiry
                                         1D )            ; minimum

rcode = 3 (Non-existent domain), ancount=0
Host not found.


Best regards.
-- 
               Roberto Nunnari -software engineer-
                 mailto:nunnari_at_die.supsi.ch
  Scuola Universitaria Professionale della Svizzera Italiana
            Dipartimento di Informatica e Elettronica
                   http://www.die.supsi.ch
  SUPSI-DIE
  Via Cantonale                        tel: +41-91-6108561
  6928 Manno                 """       fax: +41-91-6108570
  Switzerland               (o o)
=======================oOO==(_)==OOo========================
Received on Wed May 28 2003 - 08:24:33 UTC

This archive was generated by hypermail 2.4.0 : Wed May 19 2021 - 11:37:09 UTC