Linux Network Security - Page 34

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NAC Will Fill a Big IT Security Gap

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When Zotob and other worms attacked a Windows vulnerability in August, some (yeah, that's me) were surprised that large companies were affected. After all, even a simple firewall should have blocked the attack. The problem was that many large corporate networks aren't as controlled as you'd think.

Brittany Day
Nov 18, 2005

Network monitors head for the high ground

The lure of open source is strong, and it's starting to be felt by the traditional network monitoring and analysis companies - but they are finding ways to fight back, according to Janice Spampinato, VP international at WildPackets. "Packet analysis tools are very much a commodity now," she says. "Ethereal and the like has taken the legs off the portable market, so thank goodness we decided to go for the distributed market."

Benjamin D. Thomas
Nov 18, 2005

Internet security: Cisco flaws

Finnish researches today announced a high-risk vulnerability in a security protocol that serves an important role in key exchanges in IPsec VPNs. The severity of the flaw depends on different vendors, some of whom report it exists in their products and others who for now maintain their offerings are unaffected. But its impact could be great, given those vendors include heavyweights Cisco Systems, 3Com, Juniper Networks, Microsoft and IBM.

Benjamin D. Thomas
Nov 15, 2005

VPNs at risk from security glitch

A flaw in a key Internet security protocol used by major networking products could open systems up to denial-of-service (DoS) and other kinds of attacks, experts have warned. Finnish researchers at the University of Oulu announced Monday that they have found a vulnerability in the Internet Security Association and Key Management Protocol, or ISAKMP. The technology is used in IPsec virtual private network and firewall products from a range of networking companies, including giants Cisco and Juniper.

Benjamin D. Thomas
Nov 15, 2005

Is This the Dawn of the Linux Worms?

Over the weekend reports began to filter in of a new network worm that focused on a variety of vulnerabilities in products typically found in Linux-based Web servers. It's been tagged by many as a Linux problem, and is, in a practical sense, although most of the vulnerabilities aren't strictly Linux issues. So far there's no evidence it's a serious real-world problem, although the Internet Storm Center has been reporting that they are seeing multiple variants of it circulating around the net.

Brittany Day
Nov 09, 2005

CIOs nervous about IP network security

Despite high levels of concern about the security of IP networks, companies are planning to press ahead and roll out the technology regardless, according to research from the Economist Intelligence Unit (EIU).

Brittany Day
Nov 08, 2005

Replacing FTP and Telnet in Cross-platform Networks

Telnet, Rsh, Rlogin, Rcp, and FTP are commonly used methods to access files and execute commands on remote servers. They are available in most operating systems and work seamlessly in multi-platform environments. However, this convenience comes with major security risks. This document is intended for IT professionals at enterprises who need to secure file transfer and system administration access methods in heterogeneous and large-scale environments.

Benjamin D. Thomas
Nov 07, 2005

Hotrod Your Linksys WAP with Linux

A lot of Linux geeks are master scroungers, because Linux is so adaptable that old AMDs, classic Pentiums and even 386es and 486es can be put to use in some way. It's a shame to throw away old equipment when it can be repurposed as networking devices like firewalls, authentication servers and routers. But as fun as it is to recycle, I'll wager I'm not the only who has gazed upon shiny new devices like the Linksys WRT54G and sighed "Wouldn't that be a great device for my network! It is small, cheap, and uses little power.

Benjamin D. Thomas
Oct 26, 2005

VOIP may be vulnerable to barrage of threats

Is enterprise VoIP (voice over IP) due for a security wakeup call or are the threats mostly exaggerated? It depends on who's talking. "The security aspects of enterprise VoIP have been overblown," says Irwin Lazar, senior analyst at the Burton Group. "There's a lot more attention being paid to the fear of attack than what is actually possible."

Benjamin D. Thomas
Oct 25, 2005

Insider Security Threats Q&A

We conducted a brief Q&A session with David Lynch, CMO at Apani Networks, a global network security software provider focused on securing inside the network perimeter. He discusses the security breach in White House, internal security attacks in general and how to prevent them.

Brittany Day
Oct 12, 2005

What is the most challenging Sarbanes-Oxley issue facing Enterprises today?

Companies are now finding that log management is a cornerstone best practice in their compliance efforts. Sarbanes-Oxley 404 Internal IT Control requirements infer rigorous end-to-end Log Management and Archival. Net Report helps companies face this issue.

Brittany Day
Oct 07, 2005

Cisco Bolsters Network Security

Cisco Systems took steps Tuesday to address the growing need for more secure networks that can defend themselves against a variety of threats with the introduction of new incident-control and threat-mitigation software and services. It also has new versions of the company's intrusion-prevention signature (ISP) system and IOS router operating system software.

Benjamin D. Thomas
Sep 29, 2005

Cisco security certifications changing

Cisco Systems Inc. is revamping its security professional-level certifications to better reflect the networking giant's emphasis on its Self-Defending Network strategy.

Brittany Day
Sep 20, 2005

Cisco Issues Fixes for Vulnerable Web Routers

Cisco alerted its customers Wednesday about a serious security flaw in many of its Internet routers, which serve as key intersections in channeling Web and e-mail traffic from point to point. Cisco Systems Inc., based in San Jose, Calif., warned that attackers could use the flaw to seize control over specified vulnerable routers—not most routers currently in use.

Brittany Day
Sep 08, 2005

Big debate over small packets

Fernando Gont is nothing if not tenacious. Earlier this year, the Argentinian researcher highlighted several attacks that could disrupt network connections using the Internet control message protocol, or ICMP, and proposed four changes to the structure and handling of network-data packets that would essentially eliminate the risk.

Brittany Day
Sep 08, 2005

Hacker fear boosts IT security spending

Fuelled by increasing fears of virus and hack attacks, global network security appliance and software sales continue to climb steadily, rising four per cent to $1bn between the first and second quarters of this year, according to newly published figures.

Brittany Day
Aug 31, 2005

Ten-Minute Guide To Network Security

The Internet can be a dangerous place, full of viruses, worms and hackers bent on doing harm to your network. "Security first" has become a kind of mantra for IT professionals and CIOs, while regulations like Sarbanes-Oxley have made network protection as much a question of legal responsibility as good business sense.

Brittany Day
Aug 31, 2005

IT departments urged to prepare staff for IPv6

IPv6 is the replacement for IPv4, the protocol used to send and receive network traffic. The main benefit of the new version is that it offers an almost unlimited number of IP addresses. This is important as the number of internet users and connected devices, each requiring a unique IP address, is set to increase rapidly over the next few years. Although operating systems such as Unix and Linux already support IPv6, there is expected to be a huge increase in usage with the release of Windows Vista, the next version of the Microsoft operating system, next year.

Benjamin D. Thomas
Aug 31, 2005

Fighting Cyberattacks By Sharing Information

Earlier this month, a series of worms--the first of which was named Zotob--took down a significant number of Windows 2000 PCs around the world. Microsoft issued a patch and said there was no threat to Windows XP systems unless the attacker had valid log-on credentials. About two weeks later, Microsoft discovered that wasn't the case, and said the same vulnerability that Zotob used to victimize Windows 2000 systems also existed on some Windows XP systems.

Brittany Day
Aug 30, 2005

Zotob worm writer caught by FBI

Local police have arrested two people in Turkey and Morocco under suspicion of involvement in the Zotob, Rbot and Mytob computer Windows 2000 worms, according to Microsoft.

Brittany Day
Aug 29, 2005

Linux Network Security - Page 34

Harnessing Proxies for Enhanced Threat Intelligence: A Guide with Open Source Tools

Understanding HTTP Proxy Servers: A Vital Linux Network Security Tool

Exploring Vulnerability Scanners: Tools & Strategies for a Secure Network