In Julia 1.5.3, I had https-proxy, http_proxy, html_proxy, SSL_CERT_FILE set in the environment variables. I also had a _curlrc file with “insecure” in it in my home directory as well as a .condarc to get things working through our firewall. The SSL_CERT_FILE pointed to a .PEM file. I know littl…

[image] lrnv: Yes sir, i did. I installed Plots.jl (a lot of artifacts), closed Julia, restarted it, resetted the environnement variable and now I have the same hanging problem. What did you do differently the second time?

Well, I cant remember :wink: Now the situation is the following: Base.download works if the wanted is http://, hangs if https Artifacts downloads hangs as well even debug_artifacts hangs without erroring out. but of course run(curl https://google.com) works… Setting BINARYPROVIDER_DOWNLOAD_ENGIN…

After half hour of testing every potential combination of what I did, the following is necessary and sufficient for the thing to work: Check that run(curl ...) works. Then in Julia: ENV["http_proxy"] = "http://<your_proxy>:<port>" ENV["https_proy"] = "http://<your_proxy>:<port>" ENV["JULIA_SSL_NO…

Thanks to everyone in this thread! This solution worked for me. I also have Windows and when trying to install the Plots package after downloading v 1.6 I received the error: ERROR: Unable to automatically install ‘GLFW’ Simply running in julia REPL ENV[“JULIA_SSL_NO_VERIFY_HOSTS”] = “ github.com ”…

One more thing that was necessary for me: [image] Problem with curl.exe (Windows) and package installation New to Julia create a file called “_curlrc” that contains “insecure” (wihout quote) and place it in your %APPDATA% (echo %APPDATA%). For windows, curlrc file should b…

[image] lrnv: Setting the proxy parmaeters and the insecure option in the right file made it work perfectly. Saying that setting the insecure option makes it work perfectly sounds like an oxymoron though :wink:

[image] giordano: Saying that setting the insecure option makes it work perfectly sounds like an oxymoron though :wink: Indeed, but it is not my problem anymore : this is now the problem of my adminsys that did not provide a proxy that respects the standards, nor tried to do something when I …

If you are behind a MITM proxy, it is not actually insecure to turn host verification off since the certificate you’d be verifying is fake anyway. If the proxy is not verifying the server’s identity for you by checking the actual certificate, that would be insecure but presumably the proxy is config…

This post gives details on how Windows does CRL checks and how to configure things so that they will work correctly: Troubleshooting network retrieval of CRLs - Browsers | Microsoft Docs .

[image] StefanKarpinski: You might as well turn host verification off altogether when you’re behind a MITM firewall. Well, unless someone inside your MITM firewall is doing yet another MITM attack with a certificate that was not installed on your machine.

Julia 1.6 libcurl firewall download issue: Windows Schannel certificate revocation check failure

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Julia 1.6 libcurl firewall download issue: Windows Schannel certificate revocation check failure

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