05-10-2019
In general, all traffic on the Internet has a beginning and an end point Often, this is referred to as the client and the server.
The server listens on well known ports. The client generally uses whatever is available.
When you run HTTPD on your machine, it is generally acting as a client, listening on port 80, or port 443 if using SSL.
When you use YUM to access their repo services, their server is generally listening or port 80, or port 442 if using SSL.
So, when you block HTTPD on your computer, you are not blocking that service on another server, like YUM, because to access a repo like YUM or GIT you are acting as a client, accessing a server. When you block or disable HTTPD on your computer, you are simply blocking access to your server, locally.
You should probably do some homework and learn some basics about client-server processes.
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LEARN ABOUT OSX
nns_common
nameserv::common(n) Name service facility nameserv::common(n)
__________________________________________________________________________________________________________________________________________________
NAME
nameserv::common - Name service facility, shared definitions
SYNOPSIS
package require Tcl 8
package require nameserv::common ?0.1?
::nameserv::common::port
_________________________________________________________________
DESCRIPTION
Please read Name service facility, introduction first.
This package is internal and of no interest to users. It provides the commands of the name service facility which are shared by the client
and server implemented by the packages nameserv::server and nameserv (the client).
This service is built in top of and for the package comm. It has nothing to do with the Internet's Domain Name System. If the reader is
looking for a package dealing with that please see Tcllib's packages dns and resolv.
API
The package exports a single command, as specified below:
::nameserv::common::port
The result returned by the command is the id of the default TCP/IP port a nameservice server will listen on, and a name service
client will try to connect to.
BUGS, IDEAS, FEEDBACK
This document, and the package it describes, will undoubtedly contain bugs and other problems. Please report such in the category nameserv
of the Tcllib SF Trackers [http://sourceforge.net/tracker/?group_id=12883]. Please also report any ideas for enhancements you may have for
either package and/or documentation.
SEE ALSO
nameserv::client(n), nameserv::server(n)
KEYWORDS
client, name service, server
CATEGORY
Networking
COPYRIGHT
Copyright (c) 2007-2008 Andreas Kupries <andreas_kupries@users.sourceforge.net>
nns 0.1 nameserv::common(n)