On Tue, 16 Dec 2003, Jon Jensen wrote:
> On Tue, 16 Dec 2003, Jan Wieck wrote:
>
> > If you want to prevent "accidential" access, start postmaster on a
> > non-standard port.
>
> That seems like an unfriendly thing to do. You'd have to check to see what
> port is "standard" for this particular installation, and pick something
> else. You may choose an unused port, but perhaps it needs to be used in a
> few minutes by some other process, but then will be occupied. The
> administrator may also not be happy to have an open port facing the world,
> or even just other possibly untrusted users on the same machine, assuming
> you bind to localhost.
But aren't ports above a certain number "fair game"?
Yep, just answered my own question, quoting from /etc/services:
The latest IANA port assignments can be gotten from
# http://www.iana.org/assignments/port-numbers
# The Well Known Ports are those from 0 through 1023.
# The Registered Ports are those from 1024 through 49151
# The Dynamic and/or Private Ports are those from 49152 through 65535
so as long as we use 49152 and above we're cool.