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1. change your dns server to 127.0.0.1

$ vi /etc/resolve.conf  
nameserver 127.0.0.1

2. restart the network

$ sudo /etc/init.d/networking restart

3. run the script

$ sudo python tcpdns.py -f tcpdns.json.example

usage: tcpdns.py [-h] -f CONFIG_JSON [-d]

TCP DNS Proxy

optional arguments:
  -h, --help      show this help message and exit
  -f CONFIG_JSON  Json config file
  -d              Print debug message
  -s              Stop tcp dns proxy daemon

{
    "socket_timeout": 20,
    "host": "0.0.0.0",
    "port": 53,
    "tcp_dns_server": ["8.8.8.8:53",
                       "8.8.4.4:53",
                       "156.154.70.1:53",
                       "156.154.71.1:53",
                       "208.67.222.222:53",
                       "208.67.220.220:53",
                       "209.244.0.3:53"],
    "udp_dns_server": ["208.67.222.222:5353"],
    "enable_server_switch": true,
    "speed_test": true,
    "enable_lru_cache": true,
    "lru_cache_size"  : 500,
    "udp_mode"        : false,
    "daemon_process"  : false,
    "internal_dns_server": ["192.168.1.1:53"],
    "internal_domain": ["*intra*"],
    "private_host"    : {"*google.com": "203.117.34.162"}
}

• enable_server_switch: switch dns servers if network is slow
• speed_test : test dns server speed on startup
• enable_lru_cache : use lru cache to store dns server responses
• udp_mode : use udp dns procotol, default is tcp dns protocol
• daemon_process : daemon process on *nix platform
• internal_dns_server : internal dns server on internal network
• internal_domain : internal domains which use internal dns server to get ip address
• private_host : like /etc/hosts on *nix platform

• [libev] (http://libevent.org/)

• [gevent] (https://github.com/surfly/gevent)
• [pylru] (https://github.com/jlhutch/pylru)
• [python-daemon] (https://github.com/serverdensity/python-daemon) (Windows does not need)

  chmod +x ./install.sh
  ./install.sh

Use tcpdns.exe in win directory.

1. Use the following commands to install python modules

     sudo apt-get install libevent-dev
     sudo apt-get install python-pip
     sudo pip install gevent
     sudo pip install python-daemon

2. Pull the submodule source code.

     cd Tcp-DNS-proxy
     git submodule update --init --recursive

In order to build gevent library you should install Visual Studio, although tcpdns.py can run perfectly without python gevent. If you cannot run "C:\Python27\Scripts\pip.exe" in the CMD, you can try "C:\Python27\python.exe -m pip".

1. Pull the submodule source code.

     cd Tcp-DNS-proxy
     git submodule update --init --recursive

2. install python 2.7.9

3. Install pip.exe

   Download get-pip.py from get-pip.py, execute the following commands:

   python get-pip.py
   

4. install greenlet

   C:\Python27\Scripts\pip.exe install greenlet
   

5. install Microsoft Visual C++ Compiler for Python 2.7

Download link

6. Install python gevent

   C:\Python27\Scripts\pip.exe install gevent
   

7. install pyinstaller

   C:\Python27\Scripts\pip.exe install pyinstaller
   

8. execute toexe.bat

This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 2 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program. If not, see http://www.gnu.org/licenses/