Hacklog Volume 1 Anonymity: it security & Ethical Hacking Handbook



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Hacklog Volume 1 Anonymity IT Security Ethical Hacking Handbook

primary  and  secondary  DNS.  Think  of  the  secondary  DNS  as  a  backup,  when
the primary is temporarily unavailable or busy.
Currently,  there  are  many  DNS  provided  by  a  high  number  of  companies
online:  I  will  not  list  the  IP  addresses,  since  they  can  constantly  change,  but  I
suggest you to follow the official links and choose the best fit for you:
DNS name
Official Website
Comodo
Secure DNS
https://www.comodo.com/secure-dns/
DNS
Advantage
https://www.neustar.biz/services/dns-services/dns-
advantage-free-recursive-dns
FoeBuD e.V.
https://digitalcourage.de/support/zensurfreier-dns-server
German
Privacy
Foundation e.V.
http://www.privacyfoundation.de/service/serveruebersicht/
Google
Public DNS
https://developers.google.com/speed/public-dns/?csw=1
OpenDNS
https://www.opendns.com


OpenNIC
https://www.opennicproject.org
PowerDNS
https://www.powerdns.com
Validom
http://validom.net/
Please,  consider  the  highlighted  ones  as  the  most  recommended  for  your
digital raids; if possible, avoid DNS provided by Big Companies like Google (if
you know how they operate, you should avoid them).
Alternatively, you can create your own private DNS on a Dedicated Server or
VPS.  This  is  an  extremely  complex  system  administrator  task,  then  I’d  only
recommend  it  to  networking  veterans,  using  one  of  the  many  guides  available
online
[5]
.
2.3.2 Changing DNS
In most cases, you can use alternate DNS following two procedures:
1.
Changing DNS on your router/modem (recommended)
2.
Changing DNS on your Operating System
The first case directly applies to the Router or Modem you’re using, through
the  web  interface  provided  by  your  network  device.  Just  access  the  gateway
address  (obtained  by  the  commands  we  used  for  Mac  Spoofing  via  iproute2,
ifconfig or ipconfig) from your web browser, type the admin password and enter
the IPs under the DNS change section.
On  the  OpenDNS
[6]
 forum,  you  can  find  a  good  list,  including  almost  all
products  available  in  the  market,  and  how  to  change  their  values.  If  you  are
working on an Operating System, it’s easy as well.
In  example,  on  Windows  (Figure  3),  just  follow  this  path:  Start  ->  Control


Panel  ->  Network  Center  ->  *right-click  the  network  you  are  using  ->
Properties  ->  Internet  protocol  (TCP/IP)  ->  Properties  ->  Check  the  “Use  the
following DNS server addresses” option.
Figure 3: changing DNS on Windows
In  our  example,  we  changed  our  OS  DNS,  pointing  to  Google  (Windows
refers to the primary DNS as “preferred” and to the secondary as “alternate”).
On  macOS  operating  systems  (Figure  4),  just  follow  this  path:  Apple  ->
System  Preferences  ->  Network  ->  Advanced  ->  “DNS”  tab  ->  Complete  the
fields as shown and click the + button.


Figure 4: changing DNS on OSX/macOS Operating Systems
On GNU/Linux, naturally, it depends on the type of distro and the Desktop
Manager in use. In our case, using Debian with GNOME 3 (Figure 5), you can
change DNS under Network Manager (top right button) -> Choose the network
(eth0) -> *click the wheel icon* -> IPv4 -> DNS -> add DNS with the + button.
Figure 5: changing DNS on Debian Operating Systems with GNOME 3
Luckily, Linux users can do almost everything via terminal (changing DNS
included). You can edit the “resolv.conf” file using nano.
$ su
$ nano /etc/resolv.conf
Within  the  file,  enter  the  following  (if  you  find  any  value,  replace  it  or
comment using #):
nameserver {DNS}


nameserver {DNS}
Remember  that  you’ll  save  your  files  on  nano  using  CTRL+X,  then  “Y”  to
confirm  you  changes  and  ENTER  to  apply  the  final  change.  Now,  restart  your

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