STM32CubeMX cannot download software packages from server
Neither STM32CubeMX nor STM32CubeIDE can't connect to ST servers to login into MyST and/or download firmware packages/toolchains. Problem is that there is no verbose output for what is the reason, just error message

But from wireshark capture I can see that it can resolve name of server and communicate with it, so firewall shall not be an issue.

Same goes for STM32CubeIDE

But it also has access to internet, at least can see updates

And can establish connection with ST Micro servers

This issue is only with specific corporate laptop, mentioned software can run without issues on my personal PC which is in same LAN. I am working on this issue with my company IT department, but it is hard to guess what could be the problem, because there is no specific info on why error happens. To me it seems like server breaks connection, but it would be nice to get some logs out of software to understand better how to troubleshoot the issue.
