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A comment on Windows Server 2019 Includes OpenSSH. Parent comment

Re:Windows Server 2019 Includes OpenSSH by pjc50 on Wednesday December 12, 2018 @05:51AM (#18662831)
If I had to define one underlying architectural difference between UNIX and Windows, it's that Windows uses RPC (and some other kinds of structured communication) where UNIX uses pipes. This has advantages if you're Microsoft and developing both ends, but in most other cases it's a huge disadvantage to discoverability and transparency.

This is partly why nobody developed proper open source Exchange clients: the Exchange protocol is MAPI over DCE/RPC, and you need to build a lot of infrastructure before it will even talk to you.

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Re:Windows Server 2019 Includes OpenSSH by amaccuish on Wednesday December 12, 2018 @07:22AM (#18663279)
OpenChange tried to build an exchange server, and it worked to a certain extent, but it's now dead I believe. Keeping up with the recent protocol changes in Exchange was too much, though ironically with the REST and MAPI over HTTP (not RPC over HTTP), it should be a lot easier to create an exchange replacement.

Samba still does amazing stuff on the directory RPC front.

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