Installing Webmin On Debian or Ubuntu

Installing on Debian

If you are using the DEB version of webmin, run the command :

wget http://prdownloads.sourceforge.net/webadmin/webmin-1.570_all.deb

then run the command :

dpkg --install webmin_1.570_all.deb

The install will be done automatically
to /usr/share/webmin, the administration username set to
root and the password to your current root password. You should now
be able to login to Webmin at the URL http://localhost:10000/. Or if accessing it remotely, replace localhost with your system's IP address.

If Debian complains about missing dependencies, you can install them
with the command :

apt-get install perl libnet-ssleay-perl openssl libauthen-pam-perl libpam-runtime libio-pty-perl apt-show-versions python

If you are installing on Ubuntu and the apt-get command reports that some of the packages cannot be found, edit /etc/apt/sources.list and make sure the lines ending with universe are not
commented out.

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Setup NAT On Mikrotik

MIKROTIK NAT

This is a short howto explaining how to set up a full-NAT on a Mikrotik RouterOS.

This setup allows you to hide (masquerade) your private IP address from a public network. This means, for example, that in your private network you can have whatever private IP you want which is then in turn translated to the public network IP given to you by your network provider. This tutorial can thus be used by clients who want to connect to a network without requiring a change to the internal IP addressing of their LAN.

Example

In the following example we have a wireless interface which connects to a public wireless network and an Ethernet interface for the local private network.

Suppose we have 192.168.1.2/24 (Internal Private Network) 
Your RouterBoard's Ethernet interface is 192.168.1.1/24 (fixed Private Network IP) 
Your RouterBoard's Wireless card is 10.140.1.30/26 (Public Network) 
The Access Point you connect to is 10.140.1.1/26 (Public Network gateway) 

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IP Address

An Internet Protocol address (IP address) is a numerical label assigned to each device (e.g., computer, printer) participating in a computer network that uses the Internet Protocol for communication.[1] An IP address serves two principal functions: host or network interface identification and location addressing. Its role has been characterized as follows: "A name indicates what we seek. An address indicates where it is. A route indicates how to get there."[2]

The designers of the Internet Protocol defined an IP address as a 32-bit number[1] and this system, known as Internet Protocol Version 4 (IPv4), is still in use today. However, due to the enormous growth of the Internet and the predicted depletion of available addresses, a new addressing system (IPv6), using 128 bits for the address, was developed in 1995,[3] standardized as RFC 2460 in 1998,[4] and is being deployed worldwide since the mid-2000s.

IP addresses are binary numbers, but they are usually stored in text files and displayed in human-readable notations, such as 172.16.254.1 (for IPv4), and 2001:db8:0:1234:0:567:8:1 (for IPv6).

The Internet Assigned Numbers Authority (IANA) manages the IP address space allocations globally and delegates five regional Internet registries (RIRs) to allocate IP address blocks to local Internet registries (Internet service providers) and other entities.

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Installation Ubuntu Server

Ubuntu Documentation > Ubuntu 8.04 LTS > Ubuntu Server Guide > Installation > Installing from CD
Installing from CD
The basic steps to install Ubuntu Server Edition from CD are the same for installing any operating system from CD. Unlike the Desktop Edition the Server Edition does not include a graphical installation program. Instead the Server Edition uses a console menu based process.

First, download and burn the appropriate ISO file from the Ubuntu web site.

Boot the system from the CD-ROM drive.

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Osi Layer

The International Standards Organization (ISO) developed the Open Systems Interconnection (OSI) Reference Model to define functional communications standards. This reference model is widely used by equipment manufacturers to assure their products will interoperate with products from other vendors. The OSI model describes the functions that are performed in data communications. The model architecture is seven layers those are listed below with each layer defining specific functions.

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