On Sun, Oct 20, 2013 at 04:39:09PM -0700, Russ Allbery wrote: > https://www.iana.org/form/ports-services > > However, if by privileged port you mean a port number lower than 1024, > note: > > User port numbers range between 1024 and 49151. If you wish to > register a system port — those numbered 1023 or less — it must be done > through the standardisation process of the IETF. > > In other words, you will need to write an RFC for your protocol and have > it approved by the normal IETF process. (I think this is quite reasonable > given how scarce such ports are.) > The reason to make it privileged would be to prevent spoofing by non-privileged users. perhaps one of the crpto based authentication strategies, (ssh, ssl) would be better for the general case. But these are expensive of cpu cycles. -- Paul Elliott 1(512)837-1096 pelliott@BlackPatchPanel.com PMB 181, 11900 Metric Blvd Suite J http://www.free.blackpatchpanel.com/pme/ Austin TX 78758-3117 --- "Encryption works. Properly implemented strong crypto systems are one of the few things that you can rely on. Unfortunately, endpoint security is so terrifically weak that NSA can frequently find ways around it." Edward Snowden
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