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UNIX for Dummies Questions & Answers
Internet Sharing
Post 208 by Neo on Thursday 9th of November 2000 10:36:33 AM
11-09-2000
Administrator
PxT gave a good reply. I'll add a few things, perhaps it will be helpful 
By your post, I assume that you want to have users connect to your servers/services via the Internet to save the cost of having a bunch of dial of lines; the model is very much the same (not exactly but good enough for your purposes) regardless of dial-out to the Internet of dial-in from the Internet. Either way requires connectivity to the Internet.
Before jumping off to books on VPNs, Firewalls, and complex HOWTOS, it is essential that you design architecture based on your actual needs (requirements). You may not need VPNs or even a complex firewall, if your model is simple enough. On the other hand, if your model is complex, you may need a lot of gear/gadgets/configurations.
Keep in mind that that technical people, often fascinated with the technology, forget that the more complex you design a network (any system) the more it costs to sustain, maintain, and keep secure. Every line in a configuration file increases the cost of operations and ownership.
Network management experts estimate that the costs of manageing a network (and the power of the network) goes up with the square of the number of nodes on the network (N SQUARED LAW).
In a nutshell, more important than technology buzzwords is a clear roadmap on what your company plans to do and the risk management requirements and business processes. The number one mistake that I see people make is 'too much technology' and not enough planning. Keeping costs down and acquiring a high return on investment requires investing time in planning and design before considering the technical options and marketplace buzz.
[Edited by Neo on 11-09-2000 at 11:31 AM]
By your post, I assume that you want to have users connect to your servers/services via the Internet to save the cost of having a bunch of dial of lines; the model is very much the same (not exactly but good enough for your purposes) regardless of dial-out to the Internet of dial-in from the Internet. Either way requires connectivity to the Internet.
Before jumping off to books on VPNs, Firewalls, and complex HOWTOS, it is essential that you design architecture based on your actual needs (requirements). You may not need VPNs or even a complex firewall, if your model is simple enough. On the other hand, if your model is complex, you may need a lot of gear/gadgets/configurations.
Keep in mind that that technical people, often fascinated with the technology, forget that the more complex you design a network (any system) the more it costs to sustain, maintain, and keep secure. Every line in a configuration file increases the cost of operations and ownership.
Network management experts estimate that the costs of manageing a network (and the power of the network) goes up with the square of the number of nodes on the network (N SQUARED LAW).
In a nutshell, more important than technology buzzwords is a clear roadmap on what your company plans to do and the risk management requirements and business processes. The number one mistake that I see people make is 'too much technology' and not enough planning. Keeping costs down and acquiring a high return on investment requires investing time in planning and design before considering the technical options and marketplace buzz.
[Edited by Neo on 11-09-2000 at 11:31 AM]
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LEARN ABOUT SUSE
ansi_ctrlu
term::ansi::ctrl::unix(n) Terminal control term::ansi::ctrl::unix(n) __________________________________________________________________________________________________________________________________________________ NAME
term::ansi::ctrl::unix - Control operations and queries SYNOPSIS
package require Tcl 8.4 package require term::ansi::ctrl::unix ?0.1? ::term::ansi::ctrl::unix::import ?ns? ?arg...? ::term::ansi::ctrl::unix::raw ::term::ansi::ctrl::unix::raw ::term::ansi::ctrl::unix::columns ::term::ansi::ctrl::unix::rows _________________________________________________________________ DESCRIPTION
WARNING: This package is unix-specific and depends on the availability of two unix system commands for terminal control, i.e. stty and tput, both of which have to be found in the $PATH. If any of these two commands is missing the loading of the package will fail. The package provides commands to switch the standard input of the current process between raw and cooked input modes, and to query the size of terminals, i.e. the available number of columns and lines. API
INTROSPECTION ::term::ansi::ctrl::unix::import ?ns? ?arg...? This command imports some or all attribute commands into the namespace ns. This is by default the namespace ctrl. Note that this is relative namespace name, placing the imported command into a child of the current namespace. By default all commands are imported, this can howver be restricted by listing the names of the wanted commands after the namespace argument. OPERATIONS ::term::ansi::ctrl::unix::raw This command switches the standard input of the current process to raw input mode. This means that from then on all characters typed by the user are immediately reported to the application instead of waiting in the OS buffer until the Enter/Return key is received. ::term::ansi::ctrl::unix::raw This command switches the standard input of the current process to cooked input mode. This means that from then on all characters typed by the user are kept in OS buffers for editing until the Enter/Return key is received. ::term::ansi::ctrl::unix::columns This command queries the terminal connected to the standard input for the number of columns available for display. ::term::ansi::ctrl::unix::rows This command queries the terminal connected to the standard input for the number of rows (aka lines) available for display. BUGS, IDEAS, FEEDBACK This document, and the package it describes, will undoubtedly contain bugs and other problems. Please report such in the category term 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. KEYWORDS
ansi, columns, control, cooked, input mode, lines, raw, rows, terminal COPYRIGHT
Copyright (c) 2006 Andreas Kupries <andreas_kupries@users.sourceforge.net> term 0.1 term::ansi::ctrl::unix(n)