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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83
attack vectortraffic controlcybersecurity riskHacking Threats To Traffic Control Systems: A Cybersecurity Risk
The hacker in the Italian Job did it spectacularly. So did the fire sale team in Live Free or Die Hard. But can hackers really hijack traffic lights to cause gridlock and redirect cars?. According to one researcher, parts of the vehicle traffic control system installed at major arteries in U.S. cities and the nation The link for this article located at Wired is no longer available. . An investigator discloses the method by which cybercriminals can seize control of public transportation networks, leading to turmoil in key urban areas across the United States.. traffic control systems, cybersecurity threat, vehicle infrastructure, hacking risks. . LinuxSecurity.com Team
Apr 30, 2014
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Hacks/Cracks
79
network securitysystem hardeninglinux administrationImprove Linux Port Security Using Knockd Port-Knocking Server
Today, I. knockd is a port-knock server. It listens to all traffic on an ethernet (or PPP) interface, looking for special The link for this article located at Linuxaria is no longer available. . Protect your Linux system ports using fail2ban, a smart intrusion prevention framework that regulates incoming connections across multiple interfaces.. knockd, port knock, network management, traffic control, linux administration. . LinuxSecurity.com Team
Apr 19, 2011
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Security Projects
74
encryptiontraffic controlbitTorrentUnderstanding ISPs' Traffic Control Against Encrypted BitTorrent Tools
The advent of BitTorrent was a cause for celebration for people who wished to share large files very quickly, but Internet Service Providers did not see the technology in quite the same positive light. ISPs soon found that the majority of their bandwidth was taken up with BitTorrent traffic, and some, like Canadian provider Shaw, started throttling the service in response. BitTorrent clients such as Azureus added a feature that encrypted torrent traffic to try and get around these ISP roadblocks. . Now, a company called Allot Communications is claiming that their new hardware product, the NetEnforcer, is the first device that will seek out and throttle encrypted BitTorrent traffic. According to a spokesperson for the company, the NetEnforcer utilizes deep packet inspection technology "to identify and analyze hundreds of applications and protocols, track subscriber behavior, prioritize traffic and shape traffic flows." The link for this article located at ArsTechnica is no longer available. . ISPs are known to throttle encrypted BitTorrent downloads, impacting users' privacy and efficiency in file sharing, raising significant concerns for many. BitTorrent Traffic, ISPs vs Encryption, Traffic Policy, Deep Packet Inspection, Bandwidth Management. . Brittany Day
Sep 02, 2006
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Network Security
74
traffic controlpacket managementnetworking protocolsUnderstanding Traffic Control for Robust Router Packet Management
Traffic control is the name given to the sets of queuing systems and mechanisms by which packets are received and transmitted on a router. This includes deciding which (and whether) packets to accept at what rate on the input of an . . . . Traffic control is the name given to the sets of queuing systems and mechanisms by which packets are received and transmitted on a router. This includes deciding which (and whether) packets to accept at what rate on the input of an interface and determining which packets to transmit in what order at what rate on the output of an interface. In the overwhelming majority of situations, traffic control consists of a single queue which collects entering packets and dequeues them as quickly as the hardware (or underlying device) can accept them. This sort of queue is a FIFO. The link for this article located at Martin A. Brown is no longer available. . Traffic control in networking is essential for efficient data transmission. Queuing systems organize packets through routers, enabling smoother operations under load.. Traffic Control, Queue Management, Networking Protocols, Data Transmission. . Anthony Pell
Nov 18, 2003
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Network Security
79
firewallopen sourcetestingEvaluating FTwall Project for Effective Kazaa Blocking Using IPTables
Chris Lowth submits New firewalling project seeks testers for Kazaa-blocker. "P2pwall" is a sourceforge project for the development of tools and documentation for the effective firewalling of P2P application traffic using Linux IPtables. . .. Chris Lowth submits New firewalling project seeks testers for Kazaa-blocker. "P2pwall" is a sourceforge project for the development of tools and documentation for the effective firewalling of P2P application traffic using Linux IPtables . The first module to be released by this project is "ftwall" - a component that enables IPTables firewalls to block traffic from Kazaa and it's derivatives. FTwall is not yet available for general download, but the project is seeking a limited number of people to help test the alpha version. The link for this article located at ChrisLowth is no longer available. . An innovative security initiative is on the lookout for evaluators for the Torrent-Guard, aimed at bolstering P2P data management via Netfilter.. Kazaa Blocker, IPTables Firewall, P2P Application Control, Firewall Testing, Open Source Security. . LinuxSecurity.com Team
Jul 15, 2003
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Security Projects
74
network securityfirewalliptablesMaster Network Security With Iptables For Effective Firewall Management
Exposing any system, no matter how briefly, to an untrusted network is suicidal. A firewall, while not a 100% secure solution, is absolutely vital. The Linux world gives us an excellent firewall utility in netfilter/iptables. It is free and runs nicely . . . . Exposing any system, no matter how briefly, to an untrusted network is suicidal. A firewall, while not a 100% secure solution, is absolutely vital. The Linux world gives us an excellent firewall utility in netfilter/iptables. It is free and runs nicely on feeble old PCs. Netfilter/iptables is flexible, powerful, and enables fine-grained control of incoming and outgoing traffic. The two main functions this series will address are building firewalls and sharing Internet connections, which commonly go hand-in-hand. In Part 1 we'll cover basic concepts; Part 2 will offer examples of rulesets for various uses. Netfilter/iptables is included with the 2.4/2.5 Linux kernel for firewall, network address translation (NAT), and packet mangling functions. Netfilter works inside the kernel, while iptables is the table structure for the user-defined rulesets. Netfilter/iptables is the descendant of our old friends ipchains and ipwadfm (IP firewall administration); for simplicity, let's call it iptables from this point forward. Some other excellent uses for iptables are for building firewalls for individual Unix/Linux/BSD workstations and also for building firewalls for subnets to protect other platforms. It's free, so why not construct layers of defenses? Depending solely on a gateway firewall is not enough. The link for this article located at CrossNodes is no longer available. . Network security is paramount in today's digital landscape. Consider implementing robust strategies using pfSense to enhance your cyber defenses.. Firewall Configuration, Iptables Rules, Network Protection, Traffic Management, Linux Security. . Anthony Pell
Jun 03, 2003
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Network Security
72
firewallopenbsdpacket filterExploring PF in OpenBSD: Essential Traffic Filtering and NAT Features
Packet Filter (from here on referred to as PF) is OpenBSD's system for filtering TCP/IP traffic and doing Network Address Translation. PF is also capable of normalizing and conditioning TCP/IP traffic and providing bandwidth control and packet prioritization. PF has been a part of the GENERIC OpenBSD kernel since OpenBSD 3.0. Previous OpenBSD releases used a different firewall/NAT package which is no longer supported.. . .. Packet Filter (from here on referred to as PF) is OpenBSD's system for filtering TCP/IP traffic and doing Network Address Translation. PF is also capable of normalizing and conditioning TCP/IP traffic and providing bandwidth control and packet prioritization. PF has been a part of the GENERIC OpenBSD kernel since OpenBSD 3.0. Previous OpenBSD releases used a different firewall/NAT package which is no longer supported. PF was originally developed by Daniel Hartmeier and is now maintained and developed by Daniel and the rest of the OpenBSD team. This set of documents is intended as a general introduction to the PF system as run on OpenBSD. It is intended to be used as a supplement to the man pages, not as a replacement for them. This document does not cover all of PF's features and may not be as up to date as the man pages are. As with the rest of the FAQ, this document is focused on users of OpenBSD 3.3. As PF is always growing and developing, there are changes and enhancements between the 3.3-release version and the version in OpenBSD-current. The reader is advised to see the man pages for the version of OpenBSD they are currently working with. . The IP Filter is a powerful tool within FreeBSD that allows precise control over TCP/IP data flows, bolstering network security and optimizing throughput.. OpenBSD, Packet Filtering, NAT, TCP/IP, Security Tool. . Anthony Pell
May 07, 2003
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Firewalls
82
security threatsnational securitygovernment approvalUS Government Rushes Key Internet Traffic Management Changes for Security
The Bush administration sped approval for moving one of the Internet's 13 traffic-management computers after a prominent technology company urged the government to ``declare some kind of national security threat and blow past the process,'' according to federal officials' e-mails. . .. The Bush administration sped approval for moving one of the Internet's 13 traffic-management computers after a prominent technology company urged the government to ``declare some kind of national security threat and blow past the process,' according to federal officials' e-mails . The correspondence provides a window into how U.S. corporations invoke national security to expedite business requests. In this case, the Commerce Department approved in just two days Verisign Inc.'s request at the end of October to move one of the 13 computer servers that manage global Internet traffic. Verisign operates two of the world's ``root servers,' which contain lists of directories that control e-mail delivery and Web surfing. The link for this article located at SiliconValley is no longer available. . The Obama administration expedited the authorization process for relocating an essential cybersecurity network component following a threat evaluation.. National Security Influence, Internet Governance, Traffic Management, Government Actions. . Anthony Pell
Dec 16, 2002
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Government
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