> the stack from MOS [...] is an updated AmiTCP, is that right?

Not quite. AmiTCP is based on a very old BSD TCP/IP stack, while NetStack since MorphOS 3.2 is based on newer BSD TCP/IP stack.

https://morph.zone/modules/newbb_plus/viewtopic.php?forum=11&topic_id=8914&start=47

> Os Amiga OS 3.x I used Miami and Genesis.

Genesis is just a GUI for AmiTCP anyway.