Network Security
system security Linux network
system security Linux network The romanticized image of the digital nomad – a laptop on a sun-drenched balcony – rarely accounts for the actual friction of maintaining a professional development environment on the move. . The friction is amplified with Linux. We are looking for a setup that respects our kernel configurations, handles volatile network handovers, and maintains a strict security posture without the hand-holding of a consumer-grade OS – so, put simply, more than just a laptop and a sunny deck. The hardware is...
May 26, 2026
Server Securityopen-source Linux administration
open-source Linux administration Cron has existed in Unix and Linux environments for decades, handling backups, cleanup scripts, patching jobs, log rotation, monitoring tasks, and other maintenance work that administrators do not want to run manually. Most Linux servers rely on it constantly, which is exactly why attackers continue abusing it for persistence after a system has already been compromised. . Persistence through cron is not complicated. Attackers do not need a rootkit or advanced malware framework to maintain...
May 25, 2026
Vendors/Productssecurity breach linux
security breach linux A major internal repository breach at GitHub has exposed a critical and overlooked blind spot in Linux supply chain security. Kernel exploits, exposed SSH services, weak firewall rules, and vulnerable daemons dominated the Linux threat model for years, and in many environments, they still matter. But recent supply-chain incidents involving GitHub ecosystems, npm packages, and malicious developer tooling point somewhere else entirely: the developer workstation. . The breach matters because...
May 21, 2026
Security Trends access control multi-tenant
access control multi-tenant Linux administrators often face an ugly choice in the cloud: prioritize convenience and cost-efficiency by sharing infrastructure, or sacrifice those benefits for the sake of total isolation. Most modern Linux workloads don't live on their own private servers anymore. They live in shared environments like Kubernetes clusters, where multiple teams and services run side-by-side. It sounds efficient, and it usually is. . But cloud isolation isn't as ironclad as it looks on the diagram. If you...
May 21, 2026
Vendors/Productsincident response cloud security
incident response cloud security Managed Extended Detection and Response (MXDR) has become one of the most sought-after security services in the enterprise market — and with good reason. It promises the holy grail: broad visibility across endpoints, network, cloud, email, and identity, combined with the 24/7 human expertise most organizations simply cannot build in-house. . However, the rapid growth of the market has produced a wide range of providers whose capabilities vary considerably beneath the surface. Choosing the...
May 19, 2026
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76
security enhancementemail securityemail protection20 Years of KAM Ruleset Impact on Email Security and Spam Detection
Cyber risk is increasing for individuals and organizations, making flexible and robust solutions for identifying spam and malware increasingly critical. Apache SpamAssassin is an anti-spam framework we stand behind and have been using in Guardian Digital EnGarde Cloud Email Security for decades as a component of our email security solution to help detect fraudulent and malicious mail. . The KAM ruleset for SpamAssassin is a set of rules developed by the McGrail Foundation . It has been in active use and development since May 2004 and significantly improves the performance and efficacy of a stock installation of Apache SpamAssassin. The foundation is celebrating the 20th anniversary of the KAM ruleset, underlining its long-standing support of the project. In celebration of this exciting accomplishment, we sat down with Founder and ruleset author Kevin McGrail to discuss the significance of the KAM ruleset, how it has evolved over the past two decades, and future plans for the ruleset. In addition to this exclusive coverage, you’ll learn how using the ruleset can improve the security of your email to protect against known and emerging threats. . The KAM ruleset stands as a crucial framework enhancing email security, addressing the dynamic nature of cyber threats through advanced algorithms and machine learning.. Email Security Solutions, Spam Detection Techniques, Apache SpamAssassin. . Brittany Day
May 13, 2024
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Organizations/Events
74
email protectionemail authenticationsecurity benefitsExploring the Advantages of SPF for Email Security and Safeguards
Chris wrote in and mentioned a talk at Auscert which highlighted that (Sender Policy Framework) SPF would have helped in the instance of an intrusion and suggested a diary outlining some of the things that can and can't be achieved using SPF. . I have my own experiences with SPF and the effectiveness, but I'd like to hear you experiences with SPF, good or bad. so I can write a more complete diary on the topic. For those that are not familiar with SPF. The idea behind it is to create a DNS entry that specifies those machines in your network that are allowed to send email from your domain. The receiving mail server checks this record and if it does not match it will drop the message. There is a little bit more to it, but hat is the crux of it. So if you have had any experiences with SPF (good or bad) please let me know via the contact form or directly markh.isc at gmail.com. Thanks Chris for the idea and thanks in advance for your contributions. I'm aiming to get a diary out on this later this month. Cheers Mark H [All of article] The link for this article located at SANS is no longer available. . Examining the effectiveness of DKIM in protecting email communications by gathering anecdotes and expert knowledge.. Email Security, SPF Practices, Authentication Techniques. . Anthony Pell
Jun 01, 2010
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Network Security
81
email protectionemail filteringspam detectionExploring Anti-Spam Techniques: Challenges in Cybersecurity
In this article will we first look at some of the existing methods to identify an email as a spam? We look at the pros and cons of the existing methods and what are the current challenges in this domain. This article also needs a special mention to Paul Graham, for his wok in this field and putting up perhaps the most comprehensive tutorials in this domain on his homepage. I am sure that each one of us has faced this problem of spamming. Every morning when I open my inbox I spend most of the time either deleting the junk emails or reporting them as spam. . The link for this article located at Infosec Writers is no longer available. . The link for this article located at Infosec Writers is no longer available. . article, first, existing, methods, identify, email. . LinuxSecurity.com Team
Jun 28, 2006
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Privacy
77
encryptionemail protectionspam preventionExploring Messaging Security Innovations and Effective Spam Prevention
After years of narrow focus on fighting spam, messaging security vendors are branching out in new directions as corporate customers demand more from them than filtering unwanted e-mail. At the same time, this crowded industry is overripe for consolidation, and experts believe only those companies with the technology and deep pockets to satisfy growing customer demands will be left standing. . Messaging security vendors face a dilemma; they must stay focused on blocking spam, viruses and other nasty code flooding corporate e-mail streams. But as spam and virus blocking become check-list items instead of purchase drivers, vendors looking to stand out are adding new features ranging from encryption and policy enforcement for outbound messages to new product lines that protect communications other than e-mail, such as instant messaging or Web interactions. The link for this article located at Network World is no longer available. . Messaging security vendors face a dilemma; they must stay focused on blocking spam, viruses and othe. years, narrow, focus, fighting, messaging, security, vendors, branching. . LinuxSecurity.com Team
Oct 19, 2005
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Server Security
78
email protectionspam filterbusiness securityMailFoundry Network Appliance: Cost-Effective Human-Centric Spam Filter
The MailFoundry Network Appliance is new and differently conceived anti-spam solution from Green Bay, WI-based Solinus, Inc. What makes MailFoundry different from most spam filters is that it relies on human input rather than automation to find spam, and what makes it very different is its low cost. . . .. The MailFoundry Network Appliance is new and differently conceived anti-spam solution from Green Bay, WI-based Solinus, Inc. What makes MailFoundry different from most spam filters is that it relies on human input rather than automation to find spam, and what makes it very different is its low cost. "It takes the smarts of human beings to defeat human beings," says Solinus CEO David Troup, "Our human editors craft the filtering rules, and their objective is a zero per cent false positive rate." The company has team of "spam editors" constantly looking at spam e-mail message candidates to detect new spam patterns to add to the appliance's filters. How many editors does Solinus employ? "That's a trade secret," says Troup. An important target market for Solinus is the small and medium-sized business market. The hardware version of the product can be purchased for $2,995, with a $499 annual subscription fee to keep the filters up to date. Spam filters are updated "almost constantly" according to Troup. The link for this article located at John Dickinson, Messaging Pipeline is no longer available. . MailFoundry's unique spam filtering blends human insight with efficient tech, enabling businesses to manage emails effectively while reducing spam encounters. MailFoundry Anti-Spam, Human Filtering, Network Security, Email Protection, Cost-Effective Solutions. . LinuxSecurity.com Team
Sep 14, 2004
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Vendors/Products
81
email protectionproductivity lossdigital fraudExploring Technology Solutions to Combat Spam Effectively
More than 50 percent of e-mail is spam. Billions of spam attacks are launched each month. Spam costs U.S. companies at least $1 billion per year in security and human resources expenditures, as well as lost productivity. Increasingly, virus-infected machines are used to distribute spam and perpetuate additional fraud, such as phishing. Is combating spam a losing battle? We explore the potential technology solutions in our Spam Report Card 2004 videocast. . . .. More than 50 percent of e-mail is spam. Billions of spam attacks are launched each month. Spam costs U.S. companies at least $1 billion per year in security and human resources expenditures, as well as lost productivity. Increasingly, virus-infected machines are used to distribute spam and perpetuate additional fraud, such as phishing. Is combating spam a losing battle? We explore the potential technology solutions in our Spam Report Card 2004 videocast. Several approaches to combating spam have been proposed in recent months. In this videocast, we explore the various technology solutions for fighting this global electronic plague with antispam expert Peter Christy, co-founder and principal analyst at NetsEdge Research Group. The link for this article located at zdnet.com is no longer available. . More than 50 percent of e-mail is spam. Billions of spam attacks are launched each month. Spam costs. percent, e-mail, billions, attacks, launched, month, costs. . LinuxSecurity.com Team
May 06, 2004
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Privacy
81
open sourceemail protectionanti-spamProven Anti-Spam Techniques for Linux Email Users to Combat Spam
Spam has become a real problem these days. The more people who know your e-mail address, the more unwanted pieces of mail you receive. If you used your e-mail to register on some Web sites or publish a few articles in . . . . Spam has become a real problem these days. The more people who know your e-mail address, the more unwanted pieces of mail you receive. If you used your e-mail to register on some Web sites or publish a few articles in the newsgroup, you probably started to receive more unwanted messages than welcome ones. Fortunately, the users of Linux and other open-source systems have written a lot of good anti-spam filters. You can find dozens of these programs on GNU.org and Freshmeat. The anti-spam software may be sophisticated or simple, easy or difficult to use, more or less effective. Amidst the larger well-known projects, there is SpamAssassin, written by Justin Mason, and bogofilter, a Bayesian filter written by Eric S. Raymond, and others. Testmail, the filter discussed in this article, is a Perl filter of average size and moderate complexity. It checks e-mail messages available at the POP3 server, filters them according to defined rules and, depending on the selected method, sends messages to the local mailbox or removes them from the server. Testmail requires the Perl libnet, Net-Ping and Socket modules. The link for this article located at LinuxJournal is no longer available. . Spam has become a real problem these days. The more people who know your e-mail address, the more un. become, problem, these, people, e-mail, address. . LinuxSecurity.com Team
Oct 22, 2003
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Privacy
79
email protectionopen source toolvirus defenseProtect Your Email with GNU Plugin for Sendmail Virus Defense
Chris Lowth submits In the world of almost daily outbreaks of Windows-focused viruses, it's nice to find the Linux can come to Redmond's aid. The "protector" project for Linux provides a software plug-in for sendmail that strips attachments . . . . Chris Lowth submits In the world of almost daily outbreaks of Windows-focused viruses, it's nice to find the Linux can come to Redmond's aid. The "protector" project for Linux provides a software plug-in for sendmail that strips attachments that could (by nature of their type) contain viruses. It doesnt rely on signature files or regular updates but simply identifies executable attachments (and other undesirable types) and strips them from incoming mails. Protector follows a "pessimistic" paradigm and is suitable for small offices where the approach of stripping potential viruses at the risk of accepting a small number of "false possitives" is acceptable. The link for this article located at ChrisLowth is no longer available. . Safeguard your Linux servers against malicious email threats using the Shield plugin for postfix, built with a cautious mindset.. Email Protection, Virus Blockade, Sendmail Plugin, GNU Software, Open Source Tool. . LinuxSecurity.com Team
Jun 27, 2003
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