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
24 Jan 2025
DOJ indicts 5 individuals in North Korea IT worker scam
An unsealed indictment revealed threat actors working for North Korea tricked at least 64 U.S. businesses into hiring fake IT workers for financial and propriety data gains. Continue Reading
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News
23 Jan 2025
Zero-day vulnerability in SonicWall SMA series under attack
SonicWall released a hotfix for a critical pre-authentication remote code execution vulnerability in Secure Mobile Access 1000 products amidst reports of zero-day exploitation. Continue Reading
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News
23 Jul 2024
Dragos: New ICS malware FrostyGoop abuses Modbus
Dragos published research Tuesday unveiling an industrial control systems-focused malware it dubbed FrostyGoop that targets Modbus to disrupt critical infrastructure. Continue Reading
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News
22 Jul 2024
Microsoft: Faulty CrowdStrike update affected 8.5M devices
Microsoft says less than 1% of all Windows machines were affected by a defective CrowdStrike Falcon update on Friday, but the disruption has been widespread. Continue Reading
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Tip
22 Jul 2024
Where to place a firewall in an enterprise network
Firewalls are a foundational element of a strong security posture, and their positioning affects both enterprise performance and cyberdefense. Continue Reading
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Answer
19 Jul 2024
How to protect port 139 from SMB attacks
Keeping port 139 open is perfectly normal -- but only for good reason. Without the proper protections, it can present a major security risk. Continue Reading
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News
18 Jul 2024
Fin7 helps ransomware gangs with EDR bypass
SentinelOne found the Russia-based cybercriminal group is helping other threat actors, including ransomware gangs, to evade detection with a custom tool named AvNeutralizer. Continue Reading
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News
11 Jul 2024
Ransomware gangs increasingly exploiting vulnerabilities
New research from Cisco Talos highlighted three of the most popular known vulnerabilities that were exploited by ransomware gangs for initial access during 2023 and 2024. Continue Reading
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Answer
11 Jul 2024
CASB vs. SASE: What's the difference?
CASB and SASE enhance network and SaaS application security. CASB acts as a security layer for cloud services, while SASE integrates networking and security into one framework. Continue Reading
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Tip
11 Jul 2024
Understand the uses of blockchain in data centers
Blockchain is most famous for its cryptocurrency applications, but data centers can employ it for a variety of business-related reasons -- including increased security. Continue Reading
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News
09 Jul 2024
Governments issue warning on China's APT40 attacks
Government agencies say APT40 continues to pose significant risk to organizations across the globe by exploiting vulnerabilities in public-facing applications. Continue Reading
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News
08 Jul 2024
Ransomware hits CDK Global, public sector targets in June
The prevalent threat continued to cause disruptions last month as city halls were forced to close and auto dealerships faced downstream effects after an attack against CDK Global. Continue Reading
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Definition
05 Jul 2024
What is a cyber attack? How they work and how to stop them
A cyber attack is any malicious attempt to gain unauthorized access to a computer, computing system or computer network with the intent to cause damage. Continue Reading
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Feature
01 Jul 2024
Compare 5 single-vendor SASE providers
SASE has broad enterprise appeal because it combines security and connectivity. With so many vendor options available, enterprises might need help narrowing the search. Continue Reading
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News
27 Jun 2024
Supply chain attacks conducted through Polyfill.io service
In February, a Chinese company named Funnell bought the Polyfill.io domain, which sparked concerns in the infosec community about potential supply chain threats. Continue Reading
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Answer
26 Jun 2024
SPF, DKIM and DMARC: What are they and how do they work together?
Internet protocols for email authentication -- SPF, DKIM and DMARC -- coordinate defense against spammers, phishing and other spoofed email problems. Continue Reading
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Definition
25 Jun 2024
What is security information and event management (SIEM)?
Security information and event management (SIEM) is an approach to security management that combines security information management (SIM) and security event management (SEM) functions into one security management system. Continue Reading
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News
21 Jun 2024
Biden administration bans Kaspersky Lab products in US
The Biden administration announced a ban on Kaspersky Lab products inside the United States due to the antivirus vendor's ties with the Russian government. Continue Reading
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News
20 Jun 2024
SolarWinds Serv-U vulnerability under attack
The Centre for Cybersecurity Belgium observed exploitation against CVE-2024-28995, a high-severity vulnerability in SolarWind's Serv-U file transfer product. Continue Reading
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News
20 Jun 2024
Phoenix SecureCore UEFI firmware bug affects Intel processors
Multiple Intel processors and hundreds of PC models are potentially vulnerable to a recently disclosed vulnerability in Phoenix SecureCore UEFI firmware. Continue Reading
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News
18 Jun 2024
EPAM denies link to Snowflake customer attacks
EPAM, a Belarusian software company, said an investigation found no evidence that it was connected to recent attacks against Snowflake customer databases. Continue Reading
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Definition
18 Jun 2024
DNS attack
A DNS attack is an exploit in which an attacker takes advantage of vulnerabilities in the domain name system. Continue Reading
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Feature
17 Jun 2024
CASB vs. CSPM vs. CWPP: Comparing cloud security tool types
Let's break down some cloud security alphabet soup. CASB, CSPM and CWPP overlap to an extent, but you'll want to pay close attention to how they accomplish different things. Continue Reading
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Definition
13 Jun 2024
secure access service edge (SASE)
Secure access service edge (SASE), pronounced sassy, is a cloud architecture model that bundles together network and cloud-native security technologies and delivers them as a single cloud service. Continue Reading
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Definition
13 Jun 2024
Transmission Control Protocol (TCP)
Transmission Control Protocol (TCP) is a standard protocol on the internet that ensures the reliable transmission of data between devices on a network. Continue Reading
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News
12 Jun 2024
Black Basta might have exploited Microsoft flaw as zero-day
While investigating a ransomware attack, Symantec found evidence that suggests Black Basta threat actors exploited a Microsoft vulnerability as a zero-day. Continue Reading
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Answer
12 Jun 2024
Zero trust vs. defense in depth: What are the differences?
Security administrators don't have to choose between zero-trust and defense-in-depth cybersecurity methodologies. Learn how the two frameworks complement each other. Continue Reading
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Tip
11 Jun 2024
SASE vs. SSE: Explaining the differences
Most security professionals are familiar with secure access service edge, but now, there's a new tool for administrators to consider: security service edge. Continue Reading
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Tip
10 Jun 2024
Why it's SASE and zero trust, not SASE vs. zero trust
When it comes to adopting SASE or zero trust, it's not a question of either/or, but using SASE to establish and enable zero-trust network access. Continue Reading
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Guest Post
07 Jun 2024
SASE operational pain points and how to fix them
SASE offers companies a compelling security strategy, but it takes time to ensure network teams have the visibility and management oversight they need. Continue Reading
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Definition
07 Jun 2024
proof of concept (PoC) exploit
A proof of concept (PoC) exploit is a nonharmful attack against a computer or network. PoC exploits are not meant to cause harm, but to show security weaknesses within software. Continue Reading
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News
06 Jun 2024
Critical Progress Telerik vulnerability under attack
Threat actors are targeting vulnerable Progress Telerik Report Server systems just days after a proof of concept was published detailing a vulnerability exploit chain. Continue Reading
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News
06 Jun 2024
Ransomware ravaged schools and cities in May
The public sector took the brunt of ransomware in May, while another damaging attack against a healthcare company disrupted patient access to pharmacy services. Continue Reading
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News
03 Jun 2024
Mandiant: Ransomware investigations up 20% in 2023
The cybersecurity company observed a sharp rise in activity on data leak sites in 2023 as well as an increase in ransomware actors using legitimate commercial tools during attacks. Continue Reading
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News
30 May 2024
Law enforcement conducts 'largest ever' botnet takedown
An international law enforcement effort called 'Operation Endgame' disrupted several infamous malware loaders and botnets used by ransomware gangs and other cybercriminals. Continue Reading
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Answer
30 May 2024
Top 6 benefits of zero-trust security for businesses
The zero-trust security model demands infosec leaders take a holistic approach to IT infrastructure security. Learn about the top six business benefits of zero trust here. Continue Reading
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News
29 May 2024
Check Point discovers vulnerability tied to VPN attacks
While Check Point identified CVE-2024-24919 as the root cause behind recent attack attempts on its VPN products, it's unclear if threat actors gained access to customer networks. Continue Reading
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News
28 May 2024
Check Point warns of threat actors targeting VPNs
Check Point said threat actors were targeting a small number of customers by attempting to compromise local VPN accounts that only utilized passwords for authentication. Continue Reading
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News
28 May 2024
How AI could bolster software supply chain security
Supply chain risks have become more complicated and continue to affect a variety of organizations, but Synopsys' Tim Mackey believes AI could help create more secure software. Continue Reading
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Definition
23 May 2024
wireless intrusion prevention system (WIPS)
A wireless intrusion prevention system (WIPS) is a dedicated security device or integrated software application that monitors a wireless local area network (WLAN) or Wi-Fi network's radio spectrum for rogue access points (APs) and other wireless threats. Continue Reading
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Definition
23 May 2024
virtual firewall
A virtual firewall is a firewall device or service that provides network traffic filtering and monitoring for virtual machines (VMs) in a virtualized environment. Continue Reading
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News
21 May 2024
Rapid7 warns of alarming zero-day vulnerability trends
The cybersecurity vendor tracked vulnerabilities that were used by threat actors in mass compromise events and found more than half were exploited as zero days. Continue Reading
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News
20 May 2024
CyberArk to acquire Venafi from Thoma Bravo for $1.5B
CyberArk said it intends to help enterprises with the growing number of machine identities, which the company said surpasses human identities by a ratio of 40 to 1. Continue Reading
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News
16 May 2024
What LockBitSupp charges mean for ransomware investigations
At RSA Conference 2024, Recorded Future's Allan Liska discussed evolving ransomware trends and how authorities recently exposed the LockBit ransomware group ringleader. Continue Reading
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News
16 May 2024
IBM sells QRadar SaaS assets to Palo Alto Networks
The deal with Palo Alto Networks comes one year after IBM announced QRadar Suite, an AI-enhanced security platform that combined existing SIEM and XDR products. Continue Reading
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News
15 May 2024
AI-driven attacks seen as chief cloud security threat
Tried and true cloud security threats are on the rise. But according to a new report from Palo Alto Networks, the specter of generative AI threats has organizations concerned. Continue Reading
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News
14 May 2024
SonicWall CEO talks transformation, security transparency
SonicWall's CEO said that following a string of serious vulnerabilities the company responded to in 2021, product development and quality assurance operations were overhauled. Continue Reading
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Definition
10 May 2024
Pegasus malware
Pegasus malware is spyware that can hack any iOS or Android device and steal a variety of data from the infected device, including text messages, emails, key logs, audio and information from installed applications, such as Facebook or Instagram. Continue Reading
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Feature
09 May 2024
Build a resilient network: What I learned from 5 thought leaders
At the 2024 'Strategies for a Resilient Network' summit, five thought leaders shared best practices to help you achieve optimal network resiliency. Learn more. Continue Reading
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News
08 May 2024
National Security Agency warns against paying ransoms
Rob Joyce and David Luber, former and current directors of cybersecurity at the NSA, discuss how the ransomware attack on Change Healthcare exemplified the cons of paying ransoms. Continue Reading
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News
08 May 2024
White House: Threats to critical infrastructure are 'severe'
While the White House released the new National Cybersecurity Strategy last year to help combat threats to critical infrastructure organizations, attacks have continued. Continue Reading
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News
07 May 2024
SentinelOne: Ransomware actors are adapting to EDR
At RSA Conference 2024, SentinelOne's Alex Stamos discussed ongoing global threats such as ransomware and how threat actors are changing their techniques. Continue Reading
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News
07 May 2024
U.S. agencies continue to observe Volt Typhoon intrusions
A panel of experts at RSA Conference 2024 discussed Volt Typhoon and warned the Chinese nation-state threat group is still targeting and compromising U.S. organizations. Continue Reading
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Definition
06 May 2024
social engineering penetration testing
Social engineering penetration testing is the practice of deliberately conducting typical social engineering scams on employees to ascertain the organization's level of vulnerability to this type of exploit. Continue Reading
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News
06 May 2024
Cisco details Splunk security integrations, AI developments
Just two months after Cisco completed its $28 billion acquisition of analytics giant Splunk, the company added XDR capabilities into Splunk Enterprise Security. Continue Reading
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News
01 May 2024
U.S. warns of pro-Russian hacktivist attacks against OT systems
CISA calls on OT device manufacturers to implement more effective security protocols as attacks against critical infrastructure organizations continue. Continue Reading
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Definition
01 May 2024
remote access
Remote access is the ability for an authorized person to access a computer or network from a geographical distance through a network connection. Continue Reading
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News
30 Apr 2024
Change Healthcare breached via Citrix portal with no MFA
UnitedHealth Group CEO Andrew Witty's opening statement for Wednesday's congressional hearing shed more light on the ransomware attack against Change Healthcare. Continue Reading
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Tip
30 Apr 2024
How SASE convergence affects organizational silos
Most enterprises have siloed departments, but SASE's convergence of network and security functions is disrupting those constructs and driving the need for more team communication. Continue Reading
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Definition
25 Apr 2024
disaster recovery (DR)
Disaster recovery (DR) is an organization's ability to respond to and recover from an event that negatively affects business operations. Continue Reading
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News
25 Apr 2024
Dymium scares ransomware attacks with honeypot specters
Dymium, a security startup that recently emerged from stealth, offers ransomware defense for data stores with a network of honeypot traps for spoofing attackers. Continue Reading
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News
24 Apr 2024
Critical CrushFTP zero-day vulnerability under attack
While a patch is now available, a critical CrushFTP vulnerability came under attack as a zero-day and could allow attackers to exfiltrate all files on the server. Continue Reading
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Tip
23 Apr 2024
Creating a patch management policy: Step-by-step guide
A comprehensive patch management policy is insurance against security vulnerabilities and bugs in networked hardware and software that can disrupt your critical business processes. Continue Reading
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News
18 Apr 2024
Cisco discloses high-severity vulnerability, PoC available
The security vendor released fixes for a vulnerability that affects Cisco Integrated Management Controller, which is used by devices including routers and servers. Continue Reading
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Answer
18 Apr 2024
Stateful vs. stateless firewalls: Understanding the differences
Stateful firewalls are the norm in most networks, but there are still times where a stateless firewall fits the bill. Learn how these firewalls work and what approach might be best. Continue Reading
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News
17 Apr 2024
Mandiant upgrades Sandworm to APT44 due to increasing threat
Over the past decade, Sandworm has been responsible for high-severity attacks that highlight the group's persistence, evasion techniques and threat to government bodies. Continue Reading
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News
16 Apr 2024
OT security vendor Nozomi Networks lands Air Force contract
Nozomi Networks CEO Edgard Capdevielle said the $1.25 million contract will be a guarantee that 'our products will continue to meet the requirements of the Air Force.' Continue Reading
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News
11 Apr 2024
CISA discloses Sisense breach, customer data compromised
CISA is investigating a breach of data analytics vendor Sisense that may have exposed customers' credentials and secrets and could impact critical infrastructure organizations. Continue Reading
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News
08 Apr 2024
Flaws in legacy D-Link NAS devices under attack
Internet scans show threat actors are targeting CVE-2024-3273 in thousands of end-of-life D-Link NAS devices, and exploitation requires no authentication. Continue Reading
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News
04 Apr 2024
Ransomware attacks ravaged municipal governments in March
Many municipalities across the U.S. faced network outages, data breaches and large ransom demands following a flurry of ransomware attacks last month. Continue Reading
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News
03 Apr 2024
Sophos: Ransomware present in 70% of IR investigations
Sophos' Active Adversary Report said securing remote desktop protocols and Active Directories and hardening credentials can help limit the influx of successful ransomware attacks. Continue Reading
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Feature
02 Apr 2024
SASE vs. SD-WAN: What's the difference?
SASE and SD-WAN are two similar architectures administrators use to provide secure network access, but they differ in terms of deployment, security, connectivity and more. Continue Reading
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News
26 Mar 2024
SQL injection vulnerability in Fortinet software under attack
Fortinet and CISA confirmed CVE-2023-48788 is being actively exploited. But the Shadowserver Foundation found that many vulnerable instances remain online. Continue Reading
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Tip
25 Mar 2024
Agent vs. agentless security: Learn the differences
Enterprises can either use an agent or agentless approach to monitor and secure their networks. Each approach has benefits and drawbacks. Continue Reading
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News
21 Mar 2024
NCC Group: Ransomware attacks jump 73% in February
While NCC Group expected an increase in ransomware attacks from January to February, year-over-year data showed just how persistent the threat is to enterprises. Continue Reading
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Tip
21 Mar 2024
10 remote work cybersecurity risks and how to prevent them
Larger attack surfaces, limited oversight of data use and more vulnerable technologies are among the security risks faced in remote work environments. Continue Reading
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Tip
21 Mar 2024
How to avoid internet black holes for the network
Black holes in the network disrupt connectivity and compromise data integrity. Network monitoring, team collaboration and routing optimization help minimize the negative effects. Continue Reading
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News
18 Mar 2024
Exploitation activity increasing on Fortinet vulnerability
The Shadowserver Foundation recently saw an increase in exploitation activity for CVE-2024-21762, two days after a proof-of-concept exploit was published. Continue Reading
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Definition
15 Mar 2024
virus (computer virus)
A computer virus is a type of malware that attaches itself to a program or file. A virus can replicate and spread across an infected system and it often propagates to other systems, much like a biological virus spreads from host to host. Continue Reading
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Definition
14 Mar 2024
virus signature (virus definition)
A virus signature, also known as a 'virus definition,' is a piece of code with a unique binary pattern that identifies a computer virus or family of viruses. Continue Reading
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Tip
12 Mar 2024
How to secure on-prem apps with Entra Application Proxy
There's nothing wrong with using a VPN to securely connect to on-premises web apps, but Microsoft Entra Application Proxy is an alternative with a more streamlined approach. Continue Reading
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News
12 Mar 2024
LockBit attacks continue via ConnectWise ScreenConnect flaws
Coalition is latest company to confirm LockBit activity against vulnerable ScreenConnect instances. But the insurer found significant differences between previous LockBit attacks. Continue Reading
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Feature
07 Mar 2024
VPNs persist amid the rise of ZTNA, other VPN alternatives
VPN use continues despite its outdated status in the networking industry. But usage has declined as enterprises make room for remote access alternatives, like ZTNA, SASE and more. Continue Reading
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Answer
07 Mar 2024
The differences between inbound and outbound firewall rules
Firewalls can support both inbound and outbound firewall rules, but there are important differences between the two. Learn more about each and their uses. Continue Reading
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News
05 Mar 2024
Critical JetBrains TeamCity vulnerabilities under attack
Exploitation activity has started against two vulnerabilities in JetBrains TeamCity, which has been targeted previously by nation-state threat actors such as Russia's Cozy Bear. Continue Reading
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News
29 Feb 2024
CISA warns Ivanti ICT ineffective for detecting compromises
CISA observed ongoing exploitation against four Ivanti vulnerabilities and found problems with the vendor's Integrity Checker Tool, which is designed to detect compromises. Continue Reading
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Definition
27 Feb 2024
OpenSSL
OpenSSL is an open source cryptographic toolkit that facilitates secure communications between endpoints on a network. Continue Reading
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Tutorial
26 Feb 2024
How to use a jump server to link security zones
Jump servers are a perfect example of less is more. By using these slimmed-down boxes, administrators can connect to multiple resources securely. Continue Reading
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News
21 Feb 2024
Coalition: Vulnerability scoring systems falling short
Coalition said enterprises faced more substantial fallout from attacks on Citrix Bleed and Progress Software's MoveIt Transfer due to inadequate vulnerability prioritization. Continue Reading
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Tip
20 Feb 2024
A network compliance checklist for remote work
This network compliance checklist for remote work provides best practices on establishing remote policies and procedures, help desk support and data backup, among other steps. Continue Reading
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News
15 Feb 2024
Ransomware disrupts utilities, infrastructure in January
Ransomware attacks last month caused outages and disruptions at public sector and critical infrastructure organizations as well as a major financial services firm. Continue Reading
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News
15 Feb 2024
Eclypsium: Ivanti firmware has 'plethora' of security issues
In its firmware analysis, Eclypsium found that the Ivanti Pulse Secure appliance used a version of Linux that was more than a decade old and several years past end of life. Continue Reading
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Tip
14 Feb 2024
What is cybersecurity mesh and how can it help you?
The concept of cybersecurity mesh could help solve and simplify issues created by multi-cloud deployments and the increase in remote work environments. Continue Reading
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Tip
13 Feb 2024
How to conduct a social engineering penetration test
Social engineering attacks are becoming more sophisticated and more damaging. Penetration testing is one of the best ways to learn how to safeguard your systems against attack. Continue Reading
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News
12 Feb 2024
CISA warns Fortinet zero-day vulnerability under attack
CISA alerted federal agencies that a critical zero-day vulnerability in FortiOS is being actively exploited, though Fortinet has yet to confirm reports. Continue Reading
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News
08 Feb 2024
NCC Group records the most ransomware victims ever in 2023
Enterprises faced an alarming number of ransomware attacks as gangs targeted supply chains and took advantage of zero-day vulnerabilities and organizations' patching struggles. Continue Reading
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News
07 Feb 2024
CISA: Volt Typhoon had access to some U.S. targets for 5 years
A joint cybersecurity advisory expanded on the Volt Typhoon threat Wednesday, confirming attackers maintained prolonged persistent access to critical infrastructure targets. Continue Reading
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Tip
07 Feb 2024
NetSecOps best practices for network engineers
Network engineers increasingly need to align their duties with security, such as implementing continuous monitoring, deploying threat intelligence and collaborating with security. Continue Reading
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Tip
07 Feb 2024
How ZTNA protects against internal network threats
ZTNA has grown in popularity as a method to enable remote access and mitigate security risks, but businesses can also use ZTNA to protect against internal threats inside a network. Continue Reading
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Tip
05 Feb 2024
Shadow AI poses new generation of threats to enterprise IT
AI is all the rage -- and so is shadow AI. Learn how unsanctioned use of generative AI tools can open organizations up to significant risks and what to do about it. Continue Reading
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Definition
02 Feb 2024
communications security (COMSEC)
Communications security (COMSEC) is the prevention of unauthorized access to telecommunications traffic or to any written information that is transmitted or transferred. Continue Reading
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News
01 Feb 2024
Critical infrastructure hacks raise alarms on Chinese threats
FBI Director Christopher Wray and CISA Director Jen Easterly warned that China was targeting critical infrastructure for possible destructive attacks in the event of a conflict with the United States. Continue Reading