[issue45487] SSLEOFError regression with certain servers in Python 3.10

Richard added the comment: Never mind, I found the root cause after some debugging. Adding AES256-GCM-SHA384 to the cipher string resolved the issue. And now I see that the release notes say this: > The ssl module now has more secure default settings. Ciphers without forward > secrecy or SHA

[issue45487] SSLEOFError regression with certain servers in Python 3.10

Richard added the comment: Sorry, I mean it works fine with Python 3.9.2 from apt as well as Python 3.9.7 from pyenv. But 3.10.0 and 3.11-dev from pyenv are broken. -- ___ Python tracker ___

[issue45487] SSLEOFError regression with certain servers in Python 3.10

Richard added the comment: Note that the same happens with pyenv-compiled Python 3.9.7 (same way as I compiled 3.10 and 3.11), to rule out issues with different installation methods: ``` ❯ python3.9 -VV Python 3.9.7 (default, Oct 8 2021, 10:30:22) [GCC 10.2.1 20210110] ``` -- _

[issue45487] SSLEOFError regression with certain servers in Python 3.10

New submission from Richard : Starting in Python 3.10, TLS connections to certain servers (e.g. websocket-cs.vudu.com:443) are failing when it worked fine on Python 3.9 and earlier on the same system. Minimal working example: ``` #!/usr/bin/env python3 import socket import ssl HOST = 'webs