Requests failing to connect to a TLS server

by

This server is broken in multiple ways.

For one, it only understands DES-CBC3-SHA which is considered insecure and not included in the default cipher set used by requests. Additionally it looks like that it only checks a limited number of offered ciphers in the ClientHello and thus will not see that DES-CBC3-SHA is offered by the client if too much other offers are before this cipher.

A quick workaround for this broken server is to only offer the only cipher the server supports:

import requests
requests.packages.urllib3.util.ssl_.DEFAULT_CIPHERS = 'DES-CBC3-SHA'
requests.get('https://banking4.anz.com')

But note that this sets the default cipher list of requests to an insecure value. Thus this method should not be used if you want to connect to other sites within your application. Instead have a look at this more complex solution of using your own HTTPAdapter with specific cipher settings for the broken site.

More Related Contents:

  1. Python Requests throwing SSLError
  2. SSL InsecurePlatform error when using Requests package
  3. using requests with TLS doesn’t give SNI support
  4. Python Requests – How to use system ca-certificates (debian/ubuntu)?
  5. How to get Python requests to trust a self signed SSL certificate?
  6. Requests (Caused by SSLError(“Can’t connect to HTTPS URL because the SSL module is not available.”) Error in PyCharm requesting website
  7. Python requests.exceptions.SSLError: EOF occurred in violation of protocol
  8. Python requests SSL error – certificate verify failed
  9. Python – requests.exceptions.SSLError – dh key too small
  10. OpenSSL errors in python requests
  11. Python Requests getting SSLerror
  12. SSL error with Python requests despite up-to-date dependencies
  13. Caused by SSLError(“Can’t connect to HTTPS URL because the SSL module is not available.”
  14. How to get around python requests SSL and proxy error?
  15. Python requests – print entire http request (raw)?
  16. Python Requests library redirect new url
  17. Python FTP implicit TLS connection issue
  18. python ignore certificate validation urllib2
  19. Only download a part of the document using python requests
  20. Python : Trying to POST form using requests
  21. How to resume file download in Python?
  22. How can I use cookies in Python Requests?
  23. Can bs4 get the dynamic content of a webpage if requests can’t?
  24. Error status code 403 even with headers, Python Requests
  25. python requests module and connection reuse
  26. How to disable cookie handling with the Python requests library?
  27. ImportError: No module named ‘Queue’ [duplicate]
  28. SSL error unsafe legacy renegotiation disabled
  29. Using Find_All function returns an unexpected result set
  30. How do I clear cache with Python Requests?

Leave a Comment