Linux Network Security - Page 58

Discover Network Security News

Wi-Fi: Security For The Masses

data:image/svg+xml,%3Csvg%20xmlns=%22http://www.w3.org/2000/svg%22%20viewBox=%220%200%20100%20100%22%3E%3C/svg%3E

There's no doubting the hipness of wireless hot spots. Thanks to Wi-Fi technology, tech-savvy people can jack into the Net at Starbucks coffeehouses or on Lufthansa Airlines or at upscale hotels across the nation. In corporate America, Wi-Fi has the potential . . .

Anthony Pell
Jun 30, 2003

Stumbler Mapping Networks For Future Attacks

The recently discovered Stumbler network-mapping tool represents a variety of malware that leaves enterprises with little in the way of defense, other than to lock down networks and employ intrusion detection, experts said. At first, some researchers considered Stumbler a . . .

Anthony Pell
Jun 29, 2003

Taming Wi-Fi

Wi-Fi networks have, up until this point, been a bit like the Wild West: exciting, but difficult to control and keep safe. Now, a host of new management and security options are springing up as Wi-Fi penetrates corporate environments. Read on . . .

Anthony Pell
Jun 24, 2003

Doing It All with OpenSSH, Part 2

Welcome back to the Sysadmin's Corner and the continuing saga of secure communications, SSH-style. Logging in to an SSH server is easy enough and provides you with secure communications, while still opening you up to the whole world. You could set . . .

Anthony Pell
Jun 24, 2003

Proxy Terminology 101

If you've ever accessed the Internet from an office environment, chances are your communications passed through a proxy. In the next few articles, I'll discuss the advantages of using a proxy and demonstrate the configuration of several proxies available from FreeBSD's . . .

Anthony Pell
Jun 20, 2003

Security Researchers Uncover Mystery Malware

Security experts finally have a handle on mystery malware that was generating loads of suspicious IP traffic over the last few weeks. Researchers at Internet Security Systems Inc. say the culprit, which was first thought to be a new breed . . .

Anthony Pell
Jun 20, 2003

Nmap Your Network

NTSecurity writes, "Port scanning offers security professionals and systems administrators a fast and effective way to identify which services or applications their servers have open to the Internet or another network. Complex OSs, such as Windows 2000, support applications that can . . .

Anthony Pell
Jun 14, 2003

Roadblocks to Defense-in-Depth

Why haven't enterprises already done defense-in-depth? We found six barriers to pushing firewall technology to the port level. Cost. The cost of adding firewall "brains" to the inside of the network is substantial, especially compared to the continued cost reduction of . . .

Anthony Pell
Jun 13, 2003

Open relay spam is 'dying out'

Open relay spam is dying out as a problem, according to a survey published today that is likely to raise eyebrows in the spam-fighting community. Only one per cent of corporate UK mail servers tested by security testing firm NTA . . .

Anthony Pell
Jun 12, 2003

Turning the Network Inside Out

We challenged networking and firewall vendors to design an enterprise that's secure from the perimeter to the core. Their responses give us a glimpse into the future of network security. Remote connectivity, partner extranets, supply chains, on-site consultants, partners and . . .

Anthony Pell
Jun 12, 2003

Effects of Worms on Internet Routing Stability

SecurityFocus.com writes, "The impact of worms on the Internet has increased significantly over the past five years. In particular worms such as CodeRed II, NIMDA, and the more recent SQL Slammer prove that the ability to effectively impact . . .

Anthony Pell
Jun 11, 2003

TCP/IP Connection cutting on Linux Firewalls and Routers

Chris Lowth submits, Network security administrators sometimes need to be able to abort TCP/IP connections routed over their firewalls on demand. This would allow them to terminate connections such as SSH tunnels or VPNs left in place by employees over night, abort hacker attacks when they are detected, stop high bandwidth consuming downloads - etc. There are many potential applications.. . .

Anthony Pell
Jun 11, 2003

Nmap's Silent Partner

Tools that do operating system fingerprinting are a hacker's dream. They make it ridiculously simple to identify easy targets. Run Nmap against a target, learn what OS version it's running, and then look for a set of attack tools that can . . .

Anthony Pell
Jun 11, 2003

Wireless Security Not an Oxymoron

All networks are susceptible to eavesdroppers and gatecrashers. The key difference between the WLAN industry and the larger Internet community is that wireless vendors understand they can no longer get by with half measures. WLANs are not inherently insecure. There is . . .

Anthony Pell
Jun 10, 2003

The Enemy Within: Firewalls and Backdoors

As a modern IT professional you've done all the right things to keep the "bad guys" out: you protected your network with firewalls and/or proxies, deployed anti-virus software across all platforms, and secured your mobile workstations with personal firewalls. You may . . .

Anthony Pell
Jun 10, 2003

Gartner: Pescatore comments on state of enterprise security

Michael Mimoso submits, Formerly with the National Security Agency and Secret Service, Gartner Inc. vice president John Pescatore has the perspective and experience to comment on just about everything related to IT security. In this interview, conducted during the Gartner IT Security Summit, Pescatore lends his two cents on security spending, trends, cyberterrorism, government's role in security and what enterprises need to do safely stay afloat.. . .

Anthony Pell
Jun 09, 2003

The Wireless-Security Balancing Act

Wireless LANs have been billed as the great security wasteland. But thanks to the 802.11b Wi-Fi community's frenetic activity in the last year, an abundance of good security choices now exist, with more on the way. Wi-Fi security efforts . . .

Anthony Pell
Jun 09, 2003

Building Firewalls with iptables, Part 1

Exposing any system, no matter how briefly, to an untrusted network is suicidal. A firewall, while not a 100% secure solution, is absolutely vital. The Linux world gives us an excellent firewall utility in netfilter/iptables. It is free and runs nicely . . .

Anthony Pell
Jun 03, 2003

Good Enough Security: Network Security on a Shoestring Budget

A two billion dollar corporation headquartered in Massachusetts was recently hit by the SQL Server Slammer worm. It took down a key corporate database server for several days. Even though information about the vulnerability and the patch itself have been available . . .

Anthony Pell
May 29, 2003

Security Beyond WEP

IT managers fed up with the security flaws in the wired equivalent privacy standard are wondering when to begin upgrading their enterprise 802.11 wireless LANs with Wi-Fi Protected Access. However, although there is much to be gained by moving to the . . .

Anthony Pell
May 28, 2003

Linux Network Security - Page 58

Linux Pentesting Distros: An Essential Tool for Strengthening Network Security

Enhancing Network Security with Linux Proxy Servers

OPNsense 24.7 'Thriving Tiger': Elevating Open-Source Network Security and Performance