Microsoft Exchange Server Important points about RSG

Important points about RSG • An RSG can be used only to recover mailbox data. To recover public folder data, you must use a recovery forest and recovery server. • RSGs cannot be used to recover mailboxes that have been deleted. • In order to use an RSG, you must have a backup of the(…)

HOWTo replace AD+Exchange with Samba+Zimbra

This HOWTo describes how to configure Zimbra Collaboration Server (ZCS) and Samba to act as a primary domain controller (PDC) that uses LDAP (Lightweight Directory Access Protocol) as a central password database for authenticating users on Linux and Windows desktops. The motivation behind this document is the need to seamlessly integrate ZCS into corporate network(…)

How to Install/Enable NetBEUI Under WinXP

If for some reason you need to install NetBEUI then follow these instructions. **Note – You will need the WinXP CD in order to to this! Support for the NetBIOS Extended User Interface protocols (also called NetBEUI or NBF) in Windows XP has been discontinued. If your configuration requires temporary use of NetBEUI for Windows(…)

Understanding Linux Networking configuration files

etc/gated.conf Configuration for gated. Used only by the gated daemon. /etc/gated.version Contains the version number of the gated daemon. /etc/gateway Optionally used by the routed daemon. /etc/networks Lists names and addresses of networks accessible from the network to which the machine is connected. Used by route command. Allows use of name for network. /etc/protocols Lists(…)

SSH and SCP: Howto, tips & tricks

SSH SSH is some kind of an abbreviation of Secure SHell. It is a protocol that allows secure connections between computers. In this tutorial, we’ll be dealing with the ssh command on Linux, the OpenSSH version. Most Linux distributions feature the OpenSSH client today, but if you want to be sure, have a look at(…)

How to configure LVS persistence

LVS has a built-in simple IP based persistence mechanism that can be used to keep users on the same real servers for a configurable amount of time. If your web application requires that each user request to be processed by the same real server then you will probably want to enable this mechanism and ensure(…)

Wireshark – network protocol analyzer for Vista/XP/2003/2000

Wireshark is the world’s foremost network protocol analyzer, and is the de facto (and often de jure) standard across many industries and educational institutions. Wireshark development thrives thanks to the contributions of networking experts across the globe. It is the continuation of a project that started in 1998. Features Wireshark has a rich feature set(…)

How to enable Dynamic DNS Updates in Windows 2000/2003 DNS Server

Windows 2000 & Windows 2003 DNS Server Dynamic DNS update functionality enables DNS client computers to register and to dynamically update their resource records with a DNS server whenever changes occur. This reduces the requirement for manual administration of zone records, especially for clients that frequently move and use Dynamic Host Configuration Protocol (DHCP) to(…)

How to clear ARP Cache in windows Vista/XP/2003/2000

The Address Resolution Protocol (ARP) is very crucial for TCP/IP network communication. If you begin to notice network connectivity problems such as particular webpages not loading or not being able to ping certain IP addresses then clearing your ARP cache is a good place to start.The TCP/IP ARP Command component provides the functionality to add,(…)

How to Add Static route in Windows XP/2000/Vista

A route describes the gateway IP address and network interface to use when sending packets to a network. The routing table on a host holds a list of destination network and the routes to those networks. This recipe describes adding entries to this routing table that will not persist following a reboot. These temporary routes(…)

Top 100 of the Best (Useful) OpenSource Applications

The following is a list of about 100 of the best OpenSource Applications, that actually help make Linux more usable for people. It is my hope that this list shows potential Linux users that there really is a large, effective, productive and usable range of free, OpenSource applications. For existing Linux users (like myself), I(…)

How DNS Works

Domain name Servers (DNS) are an important but invisible part of the internet, and form one of the largest databases on it. Each machine on an internet is assigned a unique address, called an IP address, which is 32 bit number and is expressed as 4 octets. The method user to represent these IP addresses(…)