D
Deleted member 9563
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I started a conversion with OJ about the issue, and it was related to my server was open only on port 443. I opened it on port 80 as well, and now OJ was able to connect with Linux, but not with DOS. The server would answer a HTTP connection attempt with a 301 permanent redirection to the HTTPS site. So, old machines without a suitable TLS infrastructure are still out.
Yes, it seems that the new infatuation with security has broken most things that were prior to that. Times change.