Ubuntu Server

Network Configuration


Ubuntu ships with a number of graphical utilities to configure your network devices. This document is geared toward server administrators and will focus on managing your network on the command line.


Ethernet




Resources

------------------------------------------------------------------------------------------------------------


Dynamic Host Configuration Protocol (DHCP)



OpenSSH Server



Time Synchronisation with NTP

The Dynamic Host Configuration Protocol (DHCP) is a network service that enables host computers to be automatically assigned settings from a server as opposed to manually configuring each network host. Computers configured to be DHCP clients have no control over the settings they receive from the DHCP server, and the configuration is transparent to the computer's user.


Introduction

This section of the Ubuntu Server Guide introduces a powerful collection of tools for the remote control of networked computers and transfer of data between networked computers, called OpenSSH. You will also learn about some of the configuration settings possible with the OpenSSH server application and how to change them on your Ubuntu system.
This page describes methods for keeping your computer's time accurate. This is useful for servers, but is not necessary (or desirable) for desktop machines.NTP is a TCP/IP protocol for synchronising time over a network. Basically a client requests the current time from a server, and uses it to set its own clock..
-------------------------------------------------------------------------------------------------------------

OpenLDAP Server


LDAP is an acronym for Lightweight Directory Access Protocol, it is a simplified version of the X.500 protocol. The directory setup in this section will be used for authentication. Nevertheless, LDAP can be used in numerous ways: authentication, shared directory (for mail clients), address book, etc.




Samba and LDAP






Kerberos





Kerberos and LDAP

This section covers configuring Samba to use LDAP for user, group, and machine account information and authentication. The assumption is, you already have a working OpenLDAP directory installed and the server is configured to use it for authentication. See the section called “OpenLDAP Server” and the section called “LDAP Authentication” for details on setting up OpenLDAP. For more information on installing and configuring Samba see Chapter 17, Windows Networking.


Kerberos is a network authentication system based on the principal of a trusted third party. The other two parties being the user and the service the user wishes to authenticate to. Not all services and applications can use Kerberos, but for those that can, it brings the network environment one step closer to being Single Sign On (SSO).



Replicating a Kerberos principal database between two servers can be complicated, and adds an additional user database to your network. Fortunately, MIT Kerberos can be configured to use an LDAP directory as a principal database. This section covers configuring a primary and secondary kerberos server to use OpenLDAP for the principal database.

---------------------------------------------------------------------------------------------------------

Postfix- Email server

Postfix is the default Mail Transfer Agent (MTA) in Ubuntu. It attempts to be fast and easy to administer and secure. It is compatible with the MTA sendmail. This section explains how to install and configure postfix. It also explains how to set it up as an SMTP server using a secure connection (for sending emails securely). more
Subscribe to: Comments (Atom)