Network security
With the growth of malware and data breaches, enterprises must ensure their networks -- and the applications and traffic on those networks -- are secure. Learn about important network security strategies and technologies, such as VPNs, Secure Access Service Edge (SASE), zero trust and software-defined perimeter (SDP).
Top Stories
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Tip
08 Jan 2025
How to protect VMs with Azure Bastion hosts
Port scans are a popular hacking technique used to find network vulnerabilities. Could Azure Bastion hosts provide the network security businesses need? Continue Reading
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Opinion
26 Dec 2024
3 network security predictions for 2025
What does 2025 have in store for network security? Analyst John Grady from Informa TechTarget's Enterprise Strategy Group shares his predictions for the upcoming year. Continue Reading
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Feature
16 Nov 2015
Blue Coat ProxySG: Secure Web gateway overview
With features like authentication and Web filtering, the Blue Coat ProxySG secure Web gateway can be deployed as a physical appliance, a virtual machine or a cloud-based service. Continue Reading
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Feature
09 Nov 2015
Palo Alto WildFire: Malware sandbox product overview
Tightly integrated with existing Palo Alto next-generation firewalls, the Palo Alto WildFire cloud-based malware sandbox service supports both public and private cloud deployments. Continue Reading
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Answer
06 Oct 2015
How can enterprises manage the cybersecurity skills gap?
Due to the demand for professionals with backgrounds in both computer science and networking, filling cybersecurity jobs is difficult. Technology will have to play a bigger role. Continue Reading
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News
09 Sep 2015
Security in SDN effort puts Fortinet in limelight
Fortinet introduces a framework for security in SDN, as startups attract market spotlight. Continue Reading
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Tip
21 Aug 2015
OPM hack two months later: What was learned?
Network security expert Michele Chubirka shares her thoughts about June's OPM hack and what steps IT should take to fend off future attacks. Continue Reading
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Feature
04 Aug 2015
Facing network breach threats, visibility is key
In this Q&A, an IT pro at Penn Mutual shares how his dual strategy of user education and Layer 7 visibility helps prevent network breaches. Continue Reading
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Tip
10 Jul 2014
How to buy: Assessing next-gen firewalls
Is there a next-gen firewall in your future? Our How to Buy guide offers advice you need to ensure you purchase the best platform to meet your needs. Continue Reading
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News
23 Sep 2010
Next-generation firewalls not ready to replace all legacy firewalls
Application-aware firewalls enhance network security by offering deeper visibility, but enterprises will hang on to old-style firewalls. Continue Reading
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News
16 Sep 2010
Networking vendors aim to improve server virtualization security
Server virtualization security is no longer guaranteed by creating physical security zones for different classes of virtual machines on host servers. Networking and network security vendors are introducing virtual security products that apply security controls and policies directly to virtual machines within virtual hosts. Continue Reading
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Answer
25 Nov 2006
Intrusion detection vs. intrusion prevention
Our expert, Puneet Mehta, tells us what the key difference is between intrusion detection and intrusion prevention, in this expert response. Continue Reading
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Feature
16 Nov 2006
"Network Security: The Complete Reference," Chapter 10: Network device security
Chapter 10 focuses on using routers and switches to increase the security of the network as well as providing appropriate configuration steps for protecting the devices themselves against attacks. Continue Reading
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Tip
19 Oct 2006
How SSL and TLS secure network transactions
SSL and TLS are protocols that were developed primarily to protect Web transactions, but they can be used to protect any type of network traffic that utilizes TCP at the transport layer, including the popular SSL VPN. In this tip, learn how SSL and TLS were developed and how they work. Continue Reading
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Tip
03 Aug 2006
VPNs for disaster recovery: IPsec vs. SSL
Using a VPN as a failover mechanism when a primary communications link may be unavailable due to a disaster can be a smart move -- as well as an easy one to implement. In this tip, learn about the pros and cons of IPsec and SSL VPN options for disaster recovery. Continue Reading
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Tip
22 Jun 2006
How to move an SSL certificate between Exchange servers
SearchExchange.com contributor Serdar Yegulalp provides step-by-step instructions on how to move an SSL certificate from one Exchange server to another, and explains a couple of gotchas to watch out for during the process. Continue Reading
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Tip
07 Jun 2006
Five steps to stamp out unsafe Wi-Fi use
Lisa Phifer helps dispel the top myths of wireless security and explains five steps that network administrators can take to lead their users toward safer Wi-Fi usage. Continue Reading
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Feature
10 Apr 2006
To block or not to block: Rogue containment methods
Wireless network monitoring systems are quickly moving from detection alone to detection and prevention. In particular, many now provide options to "block" rogue devices, preventing wireless or wired network access. This tip explores how these containment features work, their potential side-effects, and what network administrators should consider before activating them. Continue Reading
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Feature
10 Apr 2006
Fighting wireless DoS attacks
Despite recent 802.11 security advances, WLANs remain very vulnerable to Denial of Service attacks. While you may not be able to prevent DoS attacks, a WIDS can help you detect when DoS attacks occur and where they come from, so that you can track the intruder down and bring him to justice -- or at least scare him away. This tip offers practical advice on how to recognize and respond to DoS attacks launched against your WLAN. Continue Reading
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Tip
02 Jan 2006
OSI: Securing the Stack, Layer 5 -- session hijacking
To help secure your systems against session hijacking, this tip walks you through the steps hackers use to hijack active sessions and take over your network. You'll also learn how to detect and prevent session hijacking attacks, a major security concern at the session layer -- Layer 5 of the OSI model. Continue Reading
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Tip
31 Oct 2005
Cache poisoning attacks and how to prevent them
Want something scary to think about? A compromise of your name servers could cut you off from the Internet or redirect your customers to a competitor. It could even shunt sensitive electronic mail through an intermediate mail server or reroute your users to an exact replica of a popular Web site, where their keystrokes, including account names and passwords, are captured. In this tip, Cricket Liu provides a checklist of measures you can take to secure your DNS infrastructure. Continue Reading
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Tip
20 Oct 2005
VPN security: Where are the vulnerabilities?
SOX compliance mandates have pushed organizations to deliver end-to-end VPN security. This means that the VPN itself is no longer enough. Robbie Harrell explains how organizations can apply security policies to the VPN in this tip. Continue Reading
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Tip
11 Oct 2005
Understanding the differences between IDS and IPS
We all know that the Internet is a haven for cyber criminals who use the connectivity to launch an unprecedented number of attacks against enterprise networks. IDS and IPS have been developed to combat these threats, but they are not one in the same. Learn the differences between IDS and IPS, and which is right for your network, with this expert tip. Continue Reading
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Feature
18 May 2005
Commonly overlooked security hazards
Security expert Dave Piscitello covers the ten most commonly overlooked security hazards and easy ways to prevent them from placing your network at risk. Continue Reading
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Feature
14 Feb 2005
Most popular viruses and hacking tools
Here are 2004's most popular hacker tools, viruses, remote tools, adware, spyware, Trojans and worms. Continue Reading
- Answer 09 Nov 2004
- Answer 12 Oct 2004
- Answer 12 May 2004
- Tip 27 Apr 2004
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Tip
02 Mar 2004
WLAN security: Beyond the VPN
Wired networks have used virtual private networks (VPNs) to secure transactions across this edge, but this approach has its limitations. Continue Reading
- Answer 08 Sep 2003
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Feature
24 Feb 2003
Network Security Principles and Practices: Secure LAN switching
This book excerpt offers steps you can take to make Layer 2 environments and switches more secure, including permit lists, protocol filtering and VLANs. Continue Reading
