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Search results for Running A File-, Print-, Proxy-, DHCP-, AND Time-Server For Small/Medium Enterprises

Fedora

How To Harden PHP5 With Suhosin On Fedora 7

Post date: July 25, 2007, 23:07 Category: Security Views: 3910 Comments
Tutorial quote: This tutorial shows how to harden PHP5 with Suhosin on a Fedora 7 server. From the Suhosin project page: "Suhosin is an advanced protection system for PHP installations that was designed to protect servers and users from known and unknown flaws in PHP applications and the PHP core. Suhosin comes in two independent parts, that can be used separately or in combination. The first part is a small patch against the PHP core, that implements a few low-level protections against bufferoverflows or format string vulnerabilities and the second part is a powerful PHP extension that implements all the other protections."
Linux

Postfix with dkfilter (DomainKeys Implementation)

Post date: December 7, 2006, 21:12 Category: Security Views: 4623 Comments
Tutorial quote: DomainKeys is an anti-spam software application in development at Yahoo that uses a form of public key cryptography to authenticate the sender's domain. dkfilter is an SMTP-proxy designed for Postfix. It implements DomainKeys message signing and verification. It comprises two separate filters, an outbound filter for signing outgoing email on port 587, and an inbound filter for verifying signatures of incoming email on port 25. This document shows step-by-step how to install dkfilter for Postfix to deploy DomainKeys signing and verification.
Ubuntu

List of BitTorrent clients Available in Ubuntu Linux

Post date: August 12, 2008, 06:08 Category: Software Views: 3862 Comments
Tutorial quote: BitTorrent is a peer-to-peer file sharing protocol used to distribute large amounts of data. The initial distributor of the complete file or collection acts as the first seed. Each peer that downloads the data also uploads it to other peers. Relative to standard internet hosting, this provides a significant reduction in the original distributor's hardware and bandwidth resource costs. It also provides redundancy against system problems and reduces dependence on the original distributor.

A BitTorrent client is a program that manages torrent downloads and uploads using the BitTorrent protocol.
Unix+clones

How To Automate Spamcop Submissions

Post date: May 26, 2006, 07:05 Category: Network Views: 3595 Comments
Tutorial quote: Spamcop is a service which provides RBLs for mailservers in order to reject incoming mail from spammers.

Their philosophy is to process possible spam complaints from users. When they receive a certain amount of complaints during a time-period then they will blacklist the offender. This system is dependant on spam reporting from users. However, their submission process is not very user-friendly.

As I have said above, Spamcop is pretty much dependant on the user input. If no one submits and verifies spam, then they will have no blacklist. However that whole submission and verification process is a bit annoying. Why should I bother to actually submit spam to spamcop and have it verified? If I just delete it, that will take less time...

The human being isn't really made to do repeating things. This gets quickly boring and hence my idea to automate this submission and verfication process.
In this howto I will show you how I achieved that. All I do is just putting the spam into certain folders and our good old friend cron does the rest.
Debian

Debian RAID 1/5 system installer

Post date: May 28, 2005, 22:05 Category: Installing Views: 3573 Comments
Tutorial quote: Instructions for installing a very clean Debian GNU/Linux system that boots from RAID 1, and has RAID 1 or RAID 5 root and data filesystems.

The examples assume two identical harddrives, sda and sdb, on which after a small boot partition, 1 GB is used for swap, 25 GB is used for the root filesystem and everything else is for a big "data" partition that will hold non-system stuff.
RedHat

Choosing an I/O Scheduler for Red Hat Enterprise Linux 4

Post date: July 18, 2005, 22:07 Category: Benchmarks Views: 8360 Comments
Tutorial quote: The Linux kernel, the core of the operating system, is responsible for controlling disk access by using kernel I/O scheduling. Red Hat Enterprise Linux 3 with a 2.4 kernel base uses a single, robust, general purpose I/O elevator. The 2.4 I/O scheduler has a reasonable number of tuning options by controlling the amount of time a request remains in an I/O queue before being serviced using the elvtune command. While Red Hat Enterprise Linux 3 offers most workloads excellent performance, it does not always provide the best I/O characteristics for the wide range of applications in use by Linux users these days. The I/O schedulers provided in Red Hat Enterprise Linux 4, embedded in the 2.6 kernel, have advanced the I/O capabilities of Linux significantly. With Red Hat Enterprise Linux 4, applications can now optimize the kernel I/O at boot time, by selecting one of four different I/O schedulers.
Solaris

Configuring Apache

Post date: April 13, 2005, 05:04 Category: Network Views: 4723 Comments
Tutorial quote: Apache can respond to browser requests from machines on your local network (i.e. an "Intranet" Web server) or from the Internet. The installation of the Solaris OS installed and set up most of the necessary Apache files. As a result, if you want to use your system as a Web server you only need to modify one file.
Ubuntu

Flip - Convert text file line endings between Unix and DOS formats

Post date: March 2, 2009, 07:03 Category: System Views: 3308 Comments
Tutorial quote: This program converts line endings of text files between MS-DOS and **IX formats. It detects binary files in a nearly foolproof way and leaves them alone unless you override this. It will also leave files alone that are already in the right format and preserves file timestamps.User interrupts are handled gracefully and no garbage or corrupted files left behind. ‘flip’ does not convert files to a different character set, and it can not handle Apple Macintosh line endings (CR only). For that (and more), you can use the ‘recode’ program (package ‘recode’).

Linux

How to configure Linux as Internet Gateway for small office

Post date: February 17, 2009, 08:02 Category: Network Views: 6261 Comments
Tutorial quote: This tutorial shows how to set up network-address-translation (NAT) on a Linux system with iptables rules so that the system can act as a gateway and provide internet access to multiple hosts on a local network using a single public IP address. This is achieved by rewriting the source and/or destination addresses of IP packets as they pass through the NAT system.
Ubuntu

How To Install VMware Server 1.0.x On An Ubuntu 9.10 Desktop

Post date: December 17, 2009, 14:12 Category: Installing Views: 3324 Comments
Tutorial quote: This tutorial provides step-by-step instructions on how to install VMware Server 1.0.x (1.0.10 at the time of this writing) on an Ubuntu 9.10 desktop system. This is for those who prefer VMware Server 1.0.x over VMware Server 2.
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