How to use pip on windows behind an authenticating proxy

I had a similar issue, and found that my company uses NTLM proxy authentication. If you see this error in your pip.log, this is probably the issue:

Could not fetch URL http://pypi.python.org/simple/pyreadline: HTTP Error 407:
Proxy Authentication Required ( The ISA Server requires authorization to fulfill
the request. Access to the Web Proxy filter is denied. )

NTLMaps can be used to interface with the NTLM proxy server by becoming an intermediate proxy.

Download NTLMAPs, update the included server.cfg, run the main.py file, then point pip’s proxy setting to 127.0.0.1:.

I also needed to change these default values in the server.cfg file to:

LM_PART:1
NT_PART:1

# Highly experimental option. See research.txt for details.
# LM - 06820000
# NT - 05820000
# LM + NT - 
NTLM_FLAGS: 07820000

http://ntlmaps.sourceforge.net/

It took me a couple hours to figure this out but I finally got it to work using CNTLM and afterwards got it to work with just a pip config file. Here is how I got it work with the pip config file…

Solution:

1. In Windows navigate to your user profile directory (Ex. C:UsersSync) and create a folder named "pip"

2. Create a file named "pip.ini" in this directory (Ex. C:UsersSyncpippip.ini) and enter the following into it:

    [global]
    trusted-host = pypi.python.org
                   pypi.org
                   files.pythonhosted.org
    proxy = http://[domain name]%5C[username]:[password]@[proxy address]:[proxy port]

Replace [domain name], [username], [password], [proxy address] and [proxy port] with your own information.

Note, if your [domain name], [username] or [password] has special characters, you have to percent-encode | encode them.

3. At this point I was able to run "pip install" without any issues.

Hopefully this works for others too!

P.S.: This may pose a security concern because of having your password stored in plain text. If this is an issue, consider setting up CNTLM using this article (allows using hashed password instead of plain text). Afterwards set proxy = 127.0.0.1:3128in the "pip.ini" file mentioned above.

I ran into the same issue on windows 7. I managed to get it working by creating a “pip” folder with a “pip.ini” file inside it. I put this folder inside “C:Users{my.username}AppDataRoaming”, because according to the Python documentation:

On Windows the configuration file is %APPDATA%pippip.ini

In the pip.ini file I have only:

[global]
proxy = [proxy address]:[proxy port]

So no username:password. And it is working just fine.

This is how I set it up:

1. Open the command prompt(CMD) as administrator.

2. Export the proxy settings :

   set http_proxy=http://username:password@proxyAddress:port

   set https_proxy=https://username:password@proxyAddress:port

3. Install the package you want to install:

   pip install PackageName

For example:

You may also run into problems with certificates from your proxy. There are plenty of answers here on how to retrieve your proxy’s certificate.

On a Windows host, to allow pip to clear your proxy, you may want to set an environment variable such as:

PIP_CERT=C:pathtocertificatefileinpemformmyproxycert.pem

You can also use the --cert argument to PIP with the same result.

I had the same issue on a remote windows environment. I tried many solutions found here or on other similars posts but nothing worked. Finally, the solution was quite simple. I had to set NO_PROXY with cmd :

set NO_PROXY="<domain><username>:<password>@<host>:<port>"
pip install <packagename>

You have to use double quotes and set NO_PROXY to upper case. You can also add NO_PROXY as an environment variable instead of setting it each time you use the console.

I hope this will help if any other solution posted here works.

install cntlm: Cntlm: Fast NTLM Authentication Proxy in C

Config cntlm.ini:

Username ob66759

Domain NAM

Password secret

Proxy proxy1.net:8080

Proxy proxy2.net:8080

NoProxy localhost, 127.0.0.*, 10.*, 192.168.*

Listen 3128

Allow 127.0.0.1

#your IP

Allow 10.106.18.138

start it:

cntlm -v -c cntlm.ini

Now in cmd.exe:

pip install –upgrade pip –proxy 127.0.0.1:3128

Collecting pip
  Downloading https://files.pythonhosted.
44c8a6e917c1820365cbebcb6a8974d1cd045ab4/

    100% |███████████████████████████████
Installing collected packages: pip
  Found existing installation: pip 9.0.1
    Uninstalling pip-9.0.1:
      Successfully uninstalled pip-9.0.1

Successfully installed pip-10.0.1

works!

You can also hide password: https://stormpoopersmith.com/2012/03/20/using-applications-behind-a-corporate-proxy/

same issue on windows10 and above solutions are not working for me.

use a emulator console tool like cygwin and then do it the default linux way:

export http_proxy=<proxy>
export https_proxy=<proxy>
pip install <package>

and things are working fine.

Try to encode backslash between domain and user

pip --proxy https://domain%5Cuser:password@proxy:port install -r requirements.txt

For me, the issue was being inside a conda environment. Most likely it used the pip command from the conda environment ("where pip" pointed to the conda environment). Setting proxy-settings via –proxy or set http_proxy did not help.

Instead, simply opening a new CMD and doing "pip install " there, helped.