[Pdns-users] How to avoid to be redirected to ad by my ISP if NXDOMAIN?

[Gerhard Gaußling]

Am Freitag, 13. November 2009 schrieb Ton van Rosmalen:
> Gerhard Gaußling schreef:
> > Am Freitag, 13. November 2009 schrieb Gerhard Gaußling:
> >> Does DHCPOFFER of 172.16.240.21 from 172.16.240.3 (my router,
> >> fritz!box), imply, that the router acts also as a dns server?
> >
> > Sorry, tzhat I answer to myself, but what means this:
> > DNS Proxy launched, local port 57270, remote 172.16.240.3:53
>
> I'm a bit at a loss. These messages come from the pdns authorative
> server afaik.
> It can be configured to use a forwarder in this case apparently your
> router.
>
> Earlier you wrote:
>
> Nov 12 23:59:50 Calling daemonize, going to background
> gerhard at ubuntu:~$
> gerhard at ubuntu:~$ ps axu|grep recu
> root     20642  0.0  0.0  12704  1416 ?        Ss   Nov12   0:00
> pdns_recursor --local-address=172.16.240.1
> --allow-from=172.16.240.1/8 --daemon --trace
>
> Which is the recursor. Using this information I would think your
> /etc/resolv.conf would need:
> nameserver 172.16.240.1
>
> The DHCP configuration can replace your local network settings which
> you should be able to adjust using th dhclient.conf.
> I can´t offer any usable advise on the dhcp matter though.

Hello  Ton,

thank you for your help. 
In my network  172.16.240.1 is localhost , the router is 172.16.240.3.

~$ hostname
ubuntu
~$ dig +short ubuntu
172.16.240.1
~$ dig +short localhost
127.0.0.1

~$ route -n
Kernel IP routing table
Destination     Gateway         Genmask       Flags Metric   Use Iface
172.16.240.1    0.0.0.0         255.255.255.255 UH    0        0    eth0
172.16.240.0    0.0.0.0         255.255.255.0   U     0      0     eth0
169.254.0.0     0.0.0.0         255.255.0.0     U     1000   0     eth0
192.168.0.0     0.0.0.0         255.255.0.0     U     0      0      eth1
0.0.0.0         172.16.240.3    0.0.0.0         UG    100    0      eth0

~$ egrep -v "(#|^ *$)" /etc/dhcp3/dhclient.conf 
send host-name "<hostname>";
prepend domain-name-servers 127.0.0.1;
request subnet-mask, broadcast-address, time-offset, routers,
	domain-name, domain-name-servers, host-name,
	netbios-name-servers, netbios-scope;
timeout 30;
alias {
  interface "eth0";
  fixed-address 172.16.240.1;
  option subnet-mask 255.255.255.255;
}
lease {
  interface "eth0";
  fixed-address 172.16.240.1;
  medium "link0 link1";
  option subnet-mask 255.255.255.0;
  option routers 172.16.240.3;
  option domain-name-servers 127.0.0.1;
  renew 2 2000/1/12 00:00:01;
  rebind 2 2000/1/12 00:00:01;
  expire 2 2000/1/12 00:00:01;
}

~$ sudo  egrep -v "(#|^ *$)" /etc/powerdns/pdns.conf
allow-recursion=192.168.158.128,192.168.158.2,,172.16.0.0/16,,192.168.0.0/16,,10.0.0.0/8,,127.0.0.1,
 allow-recursion-override=on
 cache-ttl=20
config-dir=/etc/powerdns
daemon=yes
disable-axfr=yes
 disable-tcp=no
 distributor-threads=3
guardian=yes
 launch=gmysql
lazy-recursion=yes
local-address=127.0.0.1
local-port=53
 log-dns-details=yes
 log-failed-updates=yes
 logfile=/var/log/pdns.log
 loglevel=6
module-dir=/usr/lib/powerdns
 queue-limit=1500
 recursive-cache-ttl=10
 recursor=127.0.0.1:5300
setgid=pdns
setuid=pdns
socket-dir=/var/run
 use-logfile=yes
 webserver=yes
 webserver-address=127.0.0.1
 webserver-password=xxxxx
 webserver-port=8081
version-string=powerdns
include=/etc/powerdns/pdns.d

~$ sudo egrep -v "(#|^ *$)" /etc/powerdns/recursor.conf
 allow-from=127.0.0.0/8, 10.0.0.0/8, 192.168.0.0/16, 
172.16.0.0/12, ::1/128, fe80::/10
delegation-only=com,net
export-etc-hosts=on
 local-address=127.0.0.1
local-port=5300
 log-common-errors=yes
 spoof-nearmiss-max=20
trace=on
 version-string=PowerDNS Recursor 3.1-pre2 $Id: pdns_recursor.cc 835 
2006-05-12 17:23:41Z ahu $

~$ sudo egrep -v "(#|^ *$|pass)" /etc/powerdns/pdns.d/pdns.local.gmysql
 gmysql-host=localhost
 gmysql-dbname=pdns
 gmysql-user=root
 gmysql-socket=/var/run/mysqld/mysqld.sock
~$ sudo egrep -v "(#|^ *$)" /etc/powerdns/pdns.d/pdns.recursors
recursor=172.16.240.3
~$ sudo egrep -v "(#|^ *$)" /etc/powerdns/pdns.d/pdns.local