Network security
Enterprise cyberdefense strategies must include network security best practices. Get advice on essential network security topics such as remote access, VPNs, zero-trust security, NDR, endpoint management, IoT security, hybrid security, Secure Access Service Edge, mobile security and more.
Top Stories
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News
10 Oct 2024
Coalition: Ransomware severity up 68% in first half of 2024
The cyber insurance carrier examined claims trends for the first half of 2024, which showed policyholders experienced disruptive and increasingly costly ransomware attacks. Continue Reading
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Tutorial
04 Oct 2024
How to conduct firewall testing and analyze test results
A misconfigured firewall can wreak havoc throughout your organization. Firewall testing to ensure rules are written correctly and that any changes are validated is critical. Continue Reading
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Feature
26 Jun 2009
How to compartmentalize WiFi traffic with a VLAN
Virtual LANs have long been used within enterprise networks to create logical workgroups, independent of physical location or LAN topology. This tip describes how to use these same VLAN capabilities, found in both wired and wireless devices, to tag and compartmentalize Wi-Fi traffic, supporting your company's security and traffic management policies. Continue Reading
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Answer
22 Jun 2009
Should enterprises be running multiple firewalls?
While there may be scenarios where a single firewall is an appropriate architecture for an organization, it's equally true that many environments may benefit from the use of more than one network device Continue Reading
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Answer
26 May 2009
Comparing an application proxy firewall and a gateway server firewall
There are many types of firewalls in use in today's enterprises, so it's easy to get confused about the functions of each. In this expert response, learn the difference between a proxy server firewall and a gateway server firewall. Continue Reading
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Tip
01 May 2009
Five steps to eliminate rogue wireless access
Unauthorized wireless access points aren't always malicious. Learn how to distinguish between them and mitigate threats posed by rogue APs. Continue Reading
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Tip
27 Jan 2009
How to perform a network device audit
From unauthorized applications to rogue devices like data-slurping USB sticks, enterprise networks face a growing number of security risks. For financial-services firms, the data loss or network intrusions that can result from unauthorized network devices can be devastating. Network device audits are critical to ensure devices such as routers and firewalls are configured properly. In this tip, Judith Myerson explains how to prepare and initiate a network device audit Continue Reading
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Answer
11 Dec 2008
What OSI Layer 4 protocol does FTP use to guarantee data delivery?
What OSI Layer 4 protocol does FTP use to guarantee data delivery? Continue Reading
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Answer
04 Dec 2008
What firewall features will best protect a LAN from Internet hack attacks and malware?
In the case of a small network, the necessary firewall doesn't need to be anything complicated. Network security expert Mike Chapple reviews the key features of the network device. Continue Reading
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Tip
21 Oct 2008
Recovering stolen laptops one step at a time
When a student's laptop was stolen last year on a university campus, police and IT investigators went to work, recovering it within a matter of weeks. Neil Spellman, one of the investigators on the case, offers some best practices on what to do if a laptop is taken, and how to prevent theft in the first place. Continue Reading
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Answer
16 Apr 2008
Should iPhone email be sent without SSL encryption?
SSL encrypts all of the communication between your iPhone and your mail server. Network security expert Mike Chapple explains how important that feature really is. Continue Reading
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Answer
04 Apr 2008
Should a domain controller be placed within the DMZ?
When creating an Active Directory network, is it necessary to place domain controllers in the DMZ? Network security expert Mike Chapple explains. Continue Reading
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Answer
13 Mar 2008
How to secure an FTP connection
Network security expert Mike Chapple offers three tips that enable an FTP connection without opening up an enterprise to security risks. Continue Reading
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Answer
18 Feb 2008
What are the dangers of using radio frequency identification (RFID) tags?
In this expert response, Joel Dubin discusses the dangers associated with radio frequency identification (RFID) tags, and how users can protect themselves. Continue Reading
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Tip
17 Jan 2008
Firewall redundancy: Deployment scenarios and benefits
There are, however, several good reasons to deploy multiple firewalls in your organization. Let's take a look at a few scenarios. Continue Reading
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Answer
04 Jan 2008
Does Teredo present security risks to the enterprise?
Teredo allows internal networks to transition to IPv6, interconnecting them through their NAT devices and across the IPv4 Internet. Ed Skoudis explains why this function isn't as innocent as it seems. Continue Reading
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Answer
27 Nov 2007
Will FTP ever be a secure way to transfer files?
A SearchSecurity.com member asks our network security expert Mike Chapple: Is the File Transfer Protocol a secure way to transfer files? As one of his many monthly responses to readers, Chapple reveals a better alternative to FTP. Continue Reading
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Answer
21 Aug 2007
Should a router be placed between the firewall and DMZ?
Modern firewalls have the ability to serve as a router, negating the need of another device on a network. There are exceptions to this router rule, however. Network security expert Mike Chapple explains. Continue Reading
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Answer
31 Jul 2007
How does SSL 'sit' between the network layer and application layer?
SSL is neither a network layer protocol nor an application layer protocol. In this SearchSecurity.com Q&A, Michael Cobb explains how SSL "sits" between both layers. Continue Reading
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Answer
22 Apr 2007
How do a DMZ and VPN work together?
In this SearchSecurity.com Q&A, network security expert Mike Chapple explains the three distinct network zones in a typical firewall scenario and reveals how the DMZ and VPN, in particular, co-exist. Continue Reading
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Answer
27 Mar 2007
What's the harm in removing the RFID chip in credit cards?
If you're concerned that a credit card's RFID chip is putting your personal data at risk, why not just drill the darn thing out? Not so fast, says Joel Dubin. In this SearchSecurity.com Q&A, the identity management and access control expert explains some other options. Continue Reading
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Answer
19 Feb 2007
Can a TCP connection be made without an open port?
A company may claim it has an "application" that allows computers to communicate without opening any ports, but network security expert Mike Chapple reveals whether you should believe the hype or not. Read more in this SearchSecurity.com Q&A. Continue Reading
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Answer
12 Feb 2007
How should security and networking groups manage the firewall?
When it comes to firewalls, the networking group often handles the installation, while the information security department writes the rules. Should these responsibilities be split? In this expert Q&A, security management pro Shon Harris reveals how each group should contribute to the firewall management process. Continue Reading
- Quiz 17 Nov 2005
- Answer 06 Feb 2003