Re: rsh equivalent

Barry Margolin (
19 Mar 88 12:44:32 GMT

In article <In article <722@kaos.UUCP> In article <722@kaos.UUCP> romkey@kaos.UUCP (John Romkey) writes:
>"Trusted ports" (when port numbers less than 1024 can only be used by
>a trusted user) exist only in the world of the Berkeley UNIX TCP.
>Virtually no TCP/IP implementations that are not derived from BSD
>UNIX have the concept of "trusted ports"; they will allow any user
>program to open a connection on any port that isn't already in use.

This is why the Unix RSH server also checks the host against a .rhosts
file. Presumably you would only list machines that implement the
trusted port rule.

Barry Margolin
Thinking Machines Corp.

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