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Enhancing Open UNIX Security Through Shell Application Analysis

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This article takes a look at a little shell application that uses an innovative approach to increasing open UNIX security. A step-by-step analysis of the code is provided. The author's areas of expertise are in Web programming and cutting-edge network security development.. . .

LinuxSecurity.com Team
Sep 27, 2001

vsFTPd Bandwidth Control: Enhancements For Secure File Transfers

vsFTPd, the "very secure" FTP daemon, now includes the ability to control bandwidth by preventing the link from being saturated. "vsftpd is an FTP server, or daemon. The "vs" stands for Very Secure. Obviously this is not a guarantee, but a reflection that I have written the entire codebase with security in mind, and carefully designed the program to be resilient to attack.". . .

LinuxSecurity.com Team
Sep 23, 2001

Linux Trojan Compromises Network Access: Key Security Insights

With yet another Linux-based vulnerability hitting last week, Mark Read, network security analyst at MIS Corporate Defence Solutions, delves into an age-old debate that fuels many a discussion. Yes, it's the same old story of Microsoft versus Linux in the race for optimum IT security. What everyone wants to know is, who will cross the finishing line first?. . .

LinuxSecurity.com Team
Sep 22, 2001

Safeguard Your Network Against The Dangers of the Nimda Worm

The Nimda worm has spread wildly, infecting many Microsoft Windows 9x, ME, NT 4.0, and 2000 machines, and its network scans have brought some networks to their knees. It was first reported on September 18th in the morning almost one week . . .

LinuxSecurity.com Team
Sep 21, 2001

Build A Linux Console Server For Efficient Remote Management

Building your own console server is easy. All you need is an old PC and some additional serial cards (most PCs come with only two ports). Multiport serial boards, such as those from Digi International, that install under Linux are available. . . .

LinuxSecurity.com Team
Sep 21, 2001

Innovative Open-Source Defense: LaBrea Against Worm Attacks

"LaBrea" is a free, open-source tool that deters worms and other hack attacks by transforming unused network resources into decoy-computers that appear and act just like normal machines on a network. But when malicious hackers or mindless worms such as Nimda . . .

LinuxSecurity.com Team
Sep 19, 2001

Debating Linux Safety Amid Federal Agency Security Concerns

Although proponents argue that Linux is at least as secure-and perhaps more secure-than Unix, Microsoft Corp.'s Windows NT or Novell Corp.'s NetWare, there is still concern at many federal agencies about the operating system's safety.. . .

LinuxSecurity.com Team
Sep 19, 2001

FBI: W32.Nimda Investigation on Cyber Threats in Networks

If Attorney General Ashcroft hadn't talked about this Windows worm on national TV, and received at least ten in my mailbox already, this would probably otherwise belong on an NT security web site, but certainly many of use have heterogeneous networks. Nimbda is Admin backwards... "The worm, known as "W32.Nimda," had affected. . .

LinuxSecurity.com Team
Sep 18, 2001

Monitor Network Traffic Efficiently Using RTR-Graph Perl Package

The rtr-graph package described in this article is a set of Perl scripts for polling routers (or other SNMP-enabled devices) for information about traffic in and out of specified interfaces. You can set up "rtr-traff" as a cron job to poll . . .

LinuxSecurity.com Team
Sep 17, 2001

Linux Trojan Identified: Key Findings from Symantec Research Team

"Eric Chien, chief researcher at Symantec's antivirus research centre, does not expect the virus to spread, principally because it lacks the self-replication characteristics that made Code Red and the Lion worm (which affected Linux servers) such nuisances. "I don't think . . .

LinuxSecurity.com Team
Sep 07, 2001

Exploring FreeBSD Jail Technology For Effective Process Isolation

Jail chroots an environment and sets certain restrictions on processes which are forked from within. For example, a jailed process cannot affect processes outside of the jail, utilize certain system calls, or inflict any damage on the main computer. Jail is . . .

LinuxSecurity.com Team
Sep 07, 2001

Build A Secure Network Farm With FreeBSD And OpenBSD Using NAT

This article discusses a network setup which might prove useful for people who like to put some extra effort into connecting their machines to the Internet. The goal is to build a secure client and server farm on a single IP address.. . .

LinuxSecurity.com Team
Sep 03, 2001

RSBAC 1.1.2: Overview of Open Source Access Control Framework

RSBAC is a flexible, powerful and fast open source access control framework for current Linux kernels, which has been in stable production use for over a year (since version 1.0.9a). The standard package includes a range of access control models like MAC, RC, and ACL . . .

LinuxSecurity.com Team
Sep 03, 2001

Managing VPN Security: Addressing Resistance To Vulnerability Assessments

After project leaders pan vulnerability assessment, a Back Orifice demonstration quells the skeptics. My company is about to deploy a virtual private network (VPN). During a recent project meeting, the project manager asked each department representative to identify six tasks related . . .

LinuxSecurity.com Team
Aug 28, 2001

Integrating Anti-Virus Solutions For FreeBSD Network Security

Anti-virus software for FreeBSD is not a common thought to most FreeBSD administrators. However, if you're like me, most of my networks are Windows 2000/NT on the workstations, and FreeBSD on the servers. This means that the average user can download . . .

LinuxSecurity.com Team
Aug 28, 2001

Sendmail Update: Critical Local Access Risk for Unix/Linux Admins

Security experts and vendors of Linux and other Unix-like operating systems are urging network administrators to replace some versions of popular e-mail server software known as Sendmail, because the most recent open-source versions can provide a doorway for local hackers.. . .

LinuxSecurity.com Team
Aug 24, 2001

Sendmail: 8.11-8.12 Moderate: Input Validation Code Execution Risk

Sendmail contains an input validation error, may lead to the execution of arbitrary code with elevated privileges. Local users may be able to write arbitrary data to process memory, possibly allowing the execution of code/commands with elevated privileges.. . .

LinuxSecurity.com Team
Aug 21, 2001

Using CodeRedKiller to Prevent CodeRed Attacks on Apache Servers

codeRedKiller is a simple concept that truly can help conserve resources. It saves time and energy (bandwidth and cpu power, etc) by automatically identifying and dropping requests from CodeRed infected hosts. Its goals are to stop CodeRed requests to apache webservers . . .

LinuxSecurity.com Team
Aug 19, 2001

Securing Sendmail with TLS for Enhanced Email Protection

One of the most common uses of network systems is for e-mail-based communications. As such, a great deal of attention has been given to securing e-mail systems. However, most of this focus has been in two areas: security at the message . . .

LinuxSecurity.com Team
Aug 16, 2001

Understanding Computer Crime Costs From Security Surveys

A nice account of the costs associated with attacks and computer security. " The threat from computer crimes and other online security breaches has barely slowed, never mind stopped, according to a recent survey of 538 security professionals in U.S. corporations . . .

LinuxSecurity.com Team
Aug 06, 2001

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