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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network securitycyber attackattack analysisExploring Port Scans and Their Role in Cyber Attack Vulnerabilities
Port scanning, the practice of sniffing for computers with unprotected and open ports, isn't much of a harbinger of an attack, a University of Maryland researcher said Monday. Michel Cukier, an assistant professor at the College Park, Maryland-based school, said that contrary to common thought, few port scans actually result in an attack. In fact, only about five percent of attacks are preceded by port scans alone. . "But when you combine port scans with other kinds of scans, particularly vulnerability scans, there's a much higher probability of an attack," said Cukier. Nearly three-quarters of the attacks prefaced by some kind of scan came after both a port and a vulnerability scan were run against the exposed PCs, noted Cukier's report. "The identification of port scans and vulnerability scans launched from a single source IP address is a good indicator that an attack will follow from the same IP address," said the report. The link for this article located at Security Pipeline is no longer available. . Grasping the concept of port scans and their minimal correlation to genuine breaches, complemented by perspectives on weakness assessments.. Port Scan Analysis, Network Security Insights, Vulnerability Scanning Techniques. . Brittany Day
Dec 13, 2005
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Network Security
79
network securityintrusion detectionfirewallBoost Firewall Protection Using PSAD Against Port Scanning Threats
Michael Rash submits psad (the Port Scan Attack Detector) is a collection of four lightweight system daemons written in Perl and C that are designed to work with Linux firewalling code (iptables in the 2.4.x kernels, and ipchains in . . . . Michael Rash submits psad (the Port Scan Attack Detector) is a collection of four lightweight system daemons written in Perl and C that are designed to work with Linux firewalling code (iptables in the 2.4.x kernels, and ipchains in the 2.2.x kernels) to detect port scans. It features a set of highly configurable danger thresholds (with sensible defaults provided), verbose alert messages that include the source, destination, scanned port range, begin and end times, TCP flags and corresponding nmap options (Linux 2.4.x kernels only), email alerting, and automatic blocking of offending IP addresses via dynamic configuration of ipchains/iptables firewall rulesets. In addition, for the 2.4.x kernels psad incorporates many of the TCP, UDP, and ICMP signatures included in Snort to detect highly suspect scans for various backdoor programs (e.g. EvilFTP, GirlFriend, SubSeven), DDoS tools (mstream, shaft), and advanced port scans (syn, fin, Xmas) which are easily leveraged against a machine via nmap. . Employ psad, the Port Scan Attack Detector, to bolster your network's defenses against scanning threats, complete with adjustable alert settings.. Port Scan Detector, Network Intrusion, Linux Firewall, Alert System. . LinuxSecurity.com Team
Apr 29, 2003
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Security Projects
82
network securitycourt rulingport scanGeorgia Court Decision: Port Scans No Longer Considered Damaging
A tiff between two IT contractors that spiralled into federal court ended last month with a US district court ruling in Georgia that port scans of a network do not damage it, in reference to a section of the anti-hacking laws . . . . A tiff between two IT contractors that spiralled into federal court ended last month with a US district court ruling in Georgia that port scans of a network do not damage it, in reference to a section of the anti-hacking laws that allows victims of cyber attack to sue an attacker. Last week both sides agreed not to appeal the decision by judge Thomas Thrash, who found that the value of time spent investigating a port scan can not be considered damage. "The statute clearly states that the damage must be an impairment to the integrity and availability of the network," wrote the judge, who found that a port scan impaired neither. "It says you can't create your own damages by investigating something that would not otherwise be a crime," says hacker defence attorney Jennifer Granick. "It's a good decision for computer security researchers." The link for this article located at TheRegister is no longer available. The link for this article located at TheRegister is no longer available. . A judicial decision affirmed that network probes do not inflict harm, bolstering cybersecurity studies and inquiries.. Port Scanning Legality, Cybersecurity Law, Network Investigations, IT Contractor Disputes. . Anthony Pell
Dec 18, 2000
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