The TCP/IP port numbers below 1024 are special in that normal users
are not allowed to run servers on them. This is a security feaure, in
that if you connect to a service on one of these ports you can be
fairly sure that you have the real thing, and not a fake which some
hacker has put up for you.
The normal port number for W3 servers is port 80. This number has
been assigned to WWW by the Internet Assigned Numbers Authority, IANA.
When you run a server as a test from a non-priviliged account, you
will normally test it on other ports, such as 2784, 5000, 8001 or
The Internet Daemon
inetd (running as root) can listen
for incomming conections on port 80 and pass them down to a process
with a safer uid for the server itself. However, the
httpd versions 2.14 and later can be safely run as
root since they automatically change their user-id to
nobody or some other user-id depending on server setup.
Under UCX, the process running as a server needs BYPASS privilege to
listen to ports below 1024. This might mean you have to install the
server. With other TCP/IP packages, privilege of some sort is
email@example.com, July 1995