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

[Gerhard Gaußling]

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 found this in /var/log/daemon.log:
Nov 13 20:07:12 ubuntu pdns[26912]: Our pdns instance (18983) exited 
after signal 9
Nov 13 20:07:12 ubuntu pdns[26912]: Respawning
Nov 13 20:07:12 ubuntu dhclient: bound to 172.16.240.21 -- renewal in 
415221 seconds.
Nov 13 20:07:13 ubuntu pdns[19124]: Guardian is launching an instance
Nov 13 20:07:13 ubuntu pdns[19124]: This is module gmysqlbackend.so 
reporting
Nov 13 20:07:13 ubuntu pdns[19124]: This is a guarded instance of pdns
Nov 13 20:07:13 ubuntu pdns[19124]: It is advised to bind to explicit 
addresses with the --local-address option
Nov 13 20:07:13 ubuntu pdns[19124]: UDP server bound to 0.0.0.0:53
Nov 13 20:07:13 ubuntu pdns[19124]: TCP server bound to 0.0.0.0:53
Nov 13 20:07:13 ubuntu pdns[19124]: PowerDNS 2.9.21 (C) 2001-2006 
PowerDNS.COM BV (Apr  9 2008, 10:37:43, gcc 4.2.3 (Ubuntu 
4.2.3-2ubuntu7)) starting up
Nov 13 20:07:13 ubuntu pdns[19124]: PowerDNS comes with ABSOLUTELY NO 
WARRANTY. This is free software, and you are welcome to redistribute it 
according to the terms of the GPL version 2.
Nov 13 20:07:13 ubuntu pdns[19124]: Set effective group id to 121
Nov 13 20:07:13 ubuntu pdns[19124]: Set effective user id to 116
Nov 13 20:07:13 ubuntu pdns[19124]: DNS Proxy launched, local port 
57270, remote 172.16.240.3:53
Nov 13 20:07:13 ubuntu pdns[19124]: Launched webserver on 127.0.0.1:8081
Nov 13 20:07:13 ubuntu pdns[19124]: Creating backend connection for TCP
Nov 13 20:07:13 ubuntu pdns[19124]: gmysql Connection succesful
Nov 13 20:07:13 ubuntu pdns[19124]: About to create 3 backend threads 
for UDP
Nov 13 20:07:13 ubuntu pdns[19124]: gmysql Connection succesful
Nov 13 20:07:13 ubuntu last message repeated 2 times
Nov 13 20:07:13 ubuntu pdns[19124]: Done launching threads, ready to 
distribute questions
Nov 13 20:07:26 ubuntu pdns[19124]: Distributor misses a thread (4<3), 
spawning new one
Nov 13 20:07:26 ubuntu pdns[19124]: gmysql Connection succesful