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What is quota time and how does it work in Websense

TheÂ Limit by Quota filtering option gives employees access to sites in selected categories for a limited amount of time each day. Access is granted in configurable increments of time to sites in categories whose filtering setting isÂ Limit by Quota. Quotas give you control over how much time your employees spend on personal surfing and what [...]

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How to send email from Linux Console

To send an email from console you need to use mail command, which is an intelligent mail processing system which has a command syntax reminiscent of ed with lines replaced by messages First save the contents of the meesage in a txt file. Â To send contains of file (such as /tmp/message) as mail body then [...]

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How to Reduce photo size for emailing

If youâ€™re like me and take all your pictures with a digital camera at the highest quality possible, you may have trouble sending them by email because they will be too large. A quick way to reduce your photo size when sending it by email is to: Browse to the picture folder on your computer [...]

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How to Verify Email Security With tcpdump

I can use tcpdump to verify that encryption is working. Here is what a plain unencrypted POP mail session looks like. This is an abbreviated example showing only the initial three-way TCP handshake. You can do this yourself by firing up tcpdump, then checking mail. Ctrl+C stops it: # tcpdump port 110 15:04:49.050227 windbag.34348 > [...]

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How to Install and Configure NNTP Server (IIS 6.0)

Access to the news server can be open to everyone, or it can require user authentication. The NNTP service allows fine tuning of security policies and is capable of handling a large number of virtual domains and independent server instances on a single computer. The NNTP service is not installed by default. You must install [...]

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How to Install and Configure SAMBA in Ubuntu

Successfully networking your Ubuntu system with Windows clients involves providing and integrating with services common to Windows environments. Such services assist the sharing of data and information about the computers and users involved in the network, and may be classified under three major categories of functionality: File and Printer Sharing Services. Using the Server Message [...]

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How to Change Your Mac Address in Linux

Short for Media Access Control address, a hardware address that uniquely identifies each node of a network. In IEEE 802 networks, the Data Link Control (DLC) layer of the OSI Reference Model is divided into two sublayers: the Logical Link Control (LLC) layer and the Media Access Control (MAC) layer. The MAC layer interfaces directly [...]

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How to backup the configuration file on the PIX Firewall

It is a recommended practice to backup the configuration of the PIX Firewall for use in emergencies or for disaster recovery. But, the PIX does not support an external Flash card. The internal Flash does not support the backup of the configuration file. The configuration file must be saved externally The PIX configuration file can [...]

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How to Install and Configure SafeSquid

The name SafeSquidÂ®, suggests that it is built out of Squid. However that is not true! Squid is an excellent Caching Proxy server built by an entirely different team of people and maintained at http://www.squid-cache.orgÂ SafeSquid was originally conceived as an add-on plug-in for Squid,Â with a simple objective of merely enhancing the filtering capabilities [...]

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How to Install Zimbra on Ubuntu

Zimbra Collaboration Suite (ZCS) 5.0 is a truly modern, innovative messaging and collaboration application. Zimbra is the leading open source solution for enterprise, service provider, education, and government environments; offering administrators and their end-users unmatched benefits. It’s no wonder Zimbra is a popular choice for today’s growing Mac and Linux email server base. Ajax based [...]

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What are the steps you can take to avoid â€œDeadlocksâ€ in SQL?

Deadlocking occurs when two user processes have locks on separate objects and each process is trying to acquire a lock on the object that the other process has. When this happens, SQL Server identifies the problem and ends the deadlock by automatically choosing one process and aborting the other process, allowing the other process to [...]

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How many way to share the files in windows

7 Ways to Share Information in Windows Environment Got a document, graphic, spreadsheet, program, or just a thought you want to share with your co-workers? The method you choose to share it depends on the content you’re sharing, your personal work style, the tools you have, and if you’re at home, in your office, or [...]

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Essential Linux Server Administrator Commands

Command Summary Use arp Command mostly used for checking existing Ethernet connectivity and IP address Most common use: arp This command should be used in conjunction with the ifconfig and route commands. It is mostly useful for me to check a network card and get the IP address quick. Obviously there are many more parameters, [...]

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An Introduction to Basic IPv4 Routing

All of the operations considered in this article are operations upon a router, whether that router is a Linux box or Cisco dedicated hardware or some other type of machine. In this chapter I consider the traditional methods of IPv4 routing as using static configurations that are manually input by the network administrator. 1.1 Traditional [...]

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Some of the Basic Commands in Linux

This is an introductory guide for people learning to use a Linux system. It focuses on command-line usage. This is not because everyone will be doing everything at the command line. On the contrary, there are many useful GUI tools and programs in Linux, and some people will be content to stay with these. However, in contrast to GUI programs, which can be learned largely by “click and try”, the command-line requires some deliberate learning, and reading documentation. The benefit of this investment is that you will learn the tools and tricks of the command line which are in many cases faster, more powerful, and more flexible than any GUI program.

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