I am behind my college's ISA Proxy | Forefront Threat Management Gateway. The proxy uses NTLM Auth, so we are given credentials along with the proxy server ip and port. I have been trying a lot of Python modules like urllib,ullib2,urllib3, requests,requests-ntlm httlib and even cntlm and ntlm proxy. Nothing is working in my case. It's returning " 407 Proxy Authentication Required ( Forefront
TMG requires authorization to fulfill the request. Access to the Web Proxy filter is denied. )" or any socket error. I even tried ntlmaps. It too didn't worked out. I know NTLM is already kind of depreciated. But still some of you guys may be working behind your corporate proxy with NTLM Auth. So Any work arounds? I want a pythonic code that works on both Windows and Linux that can communicate to internet through the intermediate upstream proxy.
check out this article http://www.codemiller.com/blog/2011/05/28/overcoming-auth-pop-ups/
Maybe it will help - maybe it wont, but worth trying some of the solutions - as one of them worked for me in working around the glorious ntlm auth.
have you tried cntlm? with http_proxy environment varible? if you wish i can post step by step guide to solve this problem permanently..
Related
How can a proxy username & password be passed to boto3 without using environment variables?
There is a similar stack question, however the question & answer focus on the url/port specification. I am sitting behind a corporate proxy and need to also specify user credentials; but I am not allowed to put my login credentials in an environment variable.
I will have to read the username/password into memory, but once I have them where in boto3 do they get inputed?
Thank you in advance for your consideration and response.
Proxy configuration for boto3 is described here.
Passing username and password is not documented, however if you look at the underlying code (httpsession.py), it will extract username and password from a URL like https://username:password#example.com:443, and insert a Proxy-Authorization header using basic auth.
If that works with your company, you should be OK. However, some proxies require a different authorization method, and this will fail.
In that case will need to discuss your company's exact proxy mechanism with your IT group. They may suggest work-arounds, such as running your own proxy to handle authentication. Or they may permit you to use a cloud development tool that avoids the use of proxies.
I mention this because your deployment environment -- whether cloud or a local data center -- probably doesn't use an authenticating proxy. Which means that code written with the expectation of such a proxy won't work in a production deployment.
I'm writing this application where the user can perform a web search to obtain some information from a particular website.
Everything works well except when I'm connected to the Internet via Proxy (it's a corporate proxy).
The thing is, it works sometimes.
By sometimes I mean that if it stops working, all I have to do is to use any web browser (Chrome, IE, etc.) to surf the internet and then python's requests start working as before.
The error I get is:
OSError('Tunnel connection failed: 407 Proxy Authentication Required',)
My guess is that some sort of credentials are validated and the proxy tunnel is up again.
I tried with the proxies handlers but it remains the same.
My doubts are:
How do I know if the proxy need authentication, and if so, how to do it without hardcoding the username and password since this application will be used by others?
Is there a way to use the Windows default proxy configuration so it will work like the browsers do?
What do you think that happens when I surf the internet and then the python requests start working again?
I tried with requests and urllib.request
Any help is appreciated.
Thank you!
Check if there is any proxy setting in chrome
When I try to look up some pages, I get the following:
Your connection is not private
Attackers might be trying to steal your information from www.xxx.com (for example, passwords, messages or credit cards). NET::ERR_CERT_COMMON_NAME_INVALID
Back to safetyHide advanced
This server could not prove that it is www.xxx.com; its security certificate is from *.herokuapp.com. This may be caused by a misconfiguration or an attacker intercepting your connection.
Proceed to www.xxx.com (unsafe)
What should I do to prevent this? Somehow google has https, but I know I haven't paid for a certificate and everything runs off http, but pages are indexed in google as http(s).
You must use the SSL Endpoint addon.
Heroku use a default *.herokuapp.com certificate. For custom domains, you must use the adon.
https://devcenter.heroku.com/articles/ssl-endpoint
I'm considering moving from Apache to Lighttpd for an internal web application, written with python. The problem is that I'm relying on libapache2-mod-auth-ntlm-winbind ... which doesn't actually seem to be a well support & updated package (though that could be because it really does work well).
I'm looking for suggestions and hints about what it would take to use django itself to handle the HTTP authentication. This would allow me to be web-server-agnostic, and could potentially be a grand learning experience.
Some topical concerns:
Is it reasonable to have the custom application perform true HTTP authentication?
How involved is getting my python code connected to windows domain controller to this kind of authentication without prompting the user for a password?
Does NTLM provide any access to user details & group memberships so that I can stop searching through yet another connection to the windows domain controller via LDAP?
I would love to be able to write a module to simplify this technique which could be shared with the community.
Partial answer:
You can (and should) pass the NTLM auth off to an external helper. Basically, install Samba on the machine, configure it, join the domain, enable winbind, then use the "ntlm_auth" helper binary, probably in "pipe" mode.
Authenticating an NTLM session requires a secure pipe to the domain controller, which needs credentials (e.g. a Samba/domain-member machine account). This is the quickest route to get there.
Squid (the webcache) has code for doing NTLM auth using the external helper; FreeRadius does something similar.
The NTLM auth itself does not provide any group info; if you're running winbind you could of course use calls to "wbinfo" to get user groups.
I have a basic xml-rpc web service service running.
What is the simplest way(I'm a newbie) to implement secure authentication?
I just need some direction.
You could checkout This code for a simple XML-RPC server over HTTPS. Authentication can work in any way you wish ... they could authenticate with some credentials and you provide a cookie for the rest of the session.
The Python docs for xmlrpc include details of using the HTTP 'Authorization' header for passing in credentials.
Here is some code that uses Twisted to implement a xmlrpc auth mechanism, which could easily use HTTPS instead of HTTP.
This guy has written a HTTPS XML-RPC setup with authorization which you can download.
There are tons of resources, and ways of doing this which are easily googleable. This all depends on if you are using mod_wsgi for example, or writing a standalone server using Twisted.
Bottom line:
a) Use SSL for communication
b) Use the HTTP authorization mechanism