Post B6IZx2HjC6socPPRXE by mwl@io.mwl.io
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 (DIR) Post #B6IZH1ZNSo9iEmdFse by gumnos@bsd.cafe
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       yowzer, just shot an hour troubleshooting issues at $DAYJOB.  Finally tracked it down to the network-monitoring software (that, IIUC, is doing certificate-rewriting for external sites so it can snoop TLS traffic) silently killing outbound HTTPS connections from Python due to untrusted certificates.  In theory, it's reaching into the system certificate-store, but something went amuck.It took remoting into the user's machine, opening a Python REPL, and manually attempting to urlopen() the direct-link URL to the CSV file.  The failure to download the file resulted in a 0-byte file, which of course then produced errors about missing columns that I could clearly see present in the download when done from other machines.So I'm thankful to be able to speak knowledgeably on the TLS, CA/Trust-Anchor & TCP aspects due to reading "TLS Mastery and "Networking for System Administrators" by @mwl (wrote off the purchases as a business expense at the time, clearly returning dividends again today).Came out of the call looking like the one with the answers. 😎
       
 (DIR) Post #B6IZx2HjC6socPPRXE by mwl@io.mwl.io
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       @gumnos I'm glad I could bring you comfort in damnation