HTTP Error 401: Unauthorized at specific IP address



I’m using streaming API to collect data used in some research. I follow @twitterapi and I had changed my script in Python (a very simple one, like this

However, I forgot to update my script in a machine and it continued using basic auth and failing for 2 weeks. Now, even using OAuth, I get HTTP Error 401. The same script works fine if I use another machine with different IP address.

The problem persists for the last 3 weeks and I don’t know the reason.

Thanks in advance.