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I'm coding a discord bot in python. Whenever I try to connect to a specific site, on my EC2 instance running Amazon Linux 2, the script returns the following error:

discord.ext.commands.errors.CommandInvokeError: Command raised an exception: ClientConnectorSSLError: Cannot connect to host secure.site.here:443 ssl:None [[SSL: WRONG_SIGNATURE_TYPE] wrong signature type (_ssl.c:1076)]

(actual url snipped.)

The bot itself is dockerized, running python:3.7.4-slim-buster. The error is not present when built with image python:3.7.4-slim-stretch.

I've also tested the same script built with base image -buster on MacOS and also a GCP Compute Engine instance, both are error free.

What am I missing? Any tips welcome.

mistytalon
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1 Answers1

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My best guess, without your sharing the name of the site which is presenting the error, is that it does not support TLSv1.2, and so OpenSSL isn't able to negotiate a connection. Debian disabled support for TLSv1.1 and earlier in OpenSSL as of the Buster release, although there are suggestions that it can be re-enabled on a per-application basis if you are so inclined.

womble
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