mercredi 6 avril 2016

Use Google DNS to bypass censorship and filtering


Basically, how the ISP’s block your connection to those blocked sites such as torrent sites, etc??
They block all the connections from the DNS to those websites. Hence, when you are in their DNS (Those blocked one), they have the total control of where you can go, and where you can’t, and obviously, they do not let you go surf the blocked sites.

So what do we do to bypass them. we use an alternate DNS. There are many options available like OpenDNS, GoogleDNS, etc. The one that i am using is Google DNS, its very easy to configure.

Gogle Public DNS on Windows

  1. Go the Control Panel
  2. Click Network and Internet, then Network and Sharing Center, and click Change adapter settings
  3. Select the connection for which you want to configure Google Public DNS. For example: Select the Networking tab. Under This connection uses the following items, select Internet Protocol Version 4 (TCP/IPv4) or Internet Protocol Version 6 (TCP/IPv6) and then click Properties


    - If you are using Ethernet LAN cable, to change the settings for an Ethernet connection, right-click Local Area Connection, and click Properties


    - If you are using Wireless, to change the settings for a wireless connection, right-click Wireless Network Connection, and click Properties


    If you are prompted for an administrator password or confirmation, type the password or provide confirmation.
  4. Click Advanced and select the DNS tab. If there are any DNS server IP addresses listed there, write them down for future reference, and remove them from this window.
  5. Click OK.
  6. Select Use the following DNS server addresses. If there are any IP addresses listed in the Preferred DNS server or Alternate DNS server, write them down for future reference.
  7. Replace those addresses with the IP addresses of the Google DNS servers:Restart the connection you selected in step 3.

    For IPv4: 8.8.8.8 and/or 8.8.4.4
    For IPv6: 2001:4860:4860::8888 and/or 2001:4860:4860::8844
google dns IPV6

Gogle Public DNS on Linux

Before you change your DNS settings to use Google Public DNS, be sure to write down the current server addresses or settings on a piece of paper. It is very important that you keep these numbers for backup purposes, in case you need to revert to them at any time.
You can use either number as your primary or secondary DNS server. You can specify both numbers, but do not specify one number as both primary and secondary.


1) Edit /etc/resolv.conf:
sudo vi /etc/resolv.conf

2) Replace the nameserver lines with, or add, the following lines:
nameserver 8.8.8.8
nameserver 8.8.4.4

3) Save and exit.
4) Restart any Internet clients you are using.

Configuring DHCP client for dynamic ip address:

1) Edit /etc/dhclient.conf:
sudo vi /etc/dhclient.conf

2) If there is a line containing domain-name-servers, write down the IP addresses for future reference. Replace that line with, or add, the following line:
prepend domain-name-servers 8.8.8.8, 8.8.4.4;
2) Save and exit.
4) Restart your system.

Google DNS and IPv6


Info Google DNS

https://developers.google.com/speed/public-dns/docs/using#configure_your_network_settings_to_use_google_public_dns
Note: Google’s Public DNS intercepted in Turkey

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