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I'd like to access standard internet services as echo (port 7), discard (9), daytime (13), chargen (19) and others on my Mac OS X machine (running Mac OS X Leopard). If possible, how to enable them?

Telnet is rejected on each of those ports on my machine.

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The services you mentioned were part of xinetd, which is not used in Leopard. It was replaced with launchd, and I'm afraid there is no easy way to run those services out of the box.

Getting started with launchd (Apple.com)

Technical Note TN2083 Daemons and Agents (Apple.com)

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Linux used to let you turn services on one at a time, e.g. /sbin/chkconfig echo on. I now use macs to lecture (I want these for introductory programming – networking). So there's no equiv?

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