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Desktop Security
security advisory vulnerability
security advisory vulnerability GNOME is officially shortening its standard vulnerability disclosure window from 90 days to 30 days, a change that impacts upstream maintainers, downstream Linux distributions, and system administrators in how they handle software vulnerabilities. The policy shift, announced by long-time security coordinator Michael Catanzaro , addresses modern software patching realities and a growing influx of automated submissions. . Because GNOME is the default desktop environment on several major Linux...
Jul 21, 2026
Security Vulnerabilities security advisory moderate
security advisory moderate For organizations that run a self-hosted Git platform, it’s no longer just about hosting static code repositories. Today, Git servers are responsible for deployment pipelines, API tokens, SSH keys, package repositories, and the automation scripts that push code directly. Confirm that the upgrade addresses known vulnerabilities but also provides production environments. . That makes them trusted systems within the development environment and attractive targets for attackers looking to move...
Jul 20, 2026
Server Securitydata privacy automation
data privacy automation Every system admin has lived through the same Monday morning ritual. A queue of forty tickets, half of them password resets, permission errors, or disk space warnings that any experienced technician could resolve in under two minutes. The other half require actual judgment. For years, automation promised that software would eventually sort the two apart on its own. That promise is now being tested in production Linux environments. . Early results are reshaping how IT teams think about tier-1...
Jul 17, 2026
Privacydata collection automation
data collection automation You're running a web scraping project to collect pricing data from e-commerce sites. You set up a pool of datacenter proxies, launch your scripts, and within minutes — banned . CAPTCHAs everywhere. Your data pipeline stops before it really begins. . It's a frustrating scenario that plays out daily in ad verification, market research, and multi-account management. The website doesn't know you're doing legitimate research or monitoring. It just sees traffic coming from IP ranges it recognizes as...
Jul 17, 2026
Security Trends security advisory social engineering
security advisory social engineering Business Email Compromise used to be a numbers game — mass-blasted emails, broken English, an obvious "URGENT WIRE TRANSFER" subject line. That era is over. Generative AI has turned BEC into a tailored, low-noise operation that mimics writing style, voice, and even video presence. This piece looks at what's actually changed under the hood, what defenders are testing in response, and why so many organizations are still structurally unprepared for it. . The Infrastructure Problem Nobody Wants to...
Jul 17, 2026
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72
network securitypacket filteringiptablesSecuring Your Network with Iptables Configuration for Desktops
Today I will show you the iptables rules I set on my main personal computer, with detailed comments about why I came to use these rules after several years of Linux desktop usage. The rules I use now have been simplified as much as I could and are based on common rules and advice that can be found on the network and also on input I got from experienced network administrators. I. So here they are: # iptables -v -L Chain INPUT (policy DROP 0 packets, 0 bytes) pkts bytes target prot opt in out source destination 663K 905M ACCEPT all -- any any anywhere anywhere state RELATED,ESTABLISHED 105 6300 ACCEPT all -- lo any anywhere anywhere 0 0 ACCEPT icmp -- any any anywhere anywhere icmp destination-unreachable 0 0 ACCEPT icmp -- any any anywhere anywhere icmp time-exceeded 0 0 ACCEPT icmp -- any any anywhere anywhere icmp source-quench 0 0 ACCEPT icmp -- any any anywhere anywhere icmp parameter-problem 0 0 DROP tcp -- any any anywhere anywhere tcp flags:!FIN,SYN,RST,ACK/SYN state NEW Chain FORWARD (policy DROP 0 packets, 0 bytes) pkts bytes target prot opt in out source destination Chain OUTPUT (policy ACCEPT 0 packets, 0 bytes) pkts bytes target prot opt in out source destination We The link for this article located at 503 Service Unavailable Blog is no longer available. . Enhance your desktop security with iptables by establishing effective rules that balance strong defense and user convenience for optimal performance. Linux Firewall Rules, Iptables for Desktop, Personal Security, Network Protection. . Anthony Pell
Apr 06, 2010
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Firewalls
72
security practicesserver securityiptablesEffective Iptables For Securing Linux Servers Against Spam Attacks
'Spamming', when used in a different context, does not necessarily have to be email specific. If you ever had a chance to play arcade fighter's such as Street Fighter 2, you'll notice that certain fighters have "cheap" moves that can be "used over and over", such as M. Bison's scissor kick corner trap (ah the old days). A player could pretty much "spam" this combo over and over. The interesting part about this cheap combo is that it could be countered just as easily with some skill. A basic set of good iptables rules is the perfect counter punch to a slew of common spamming attacks - no need to have SpamAssassin or procmail process the email when it doesn't even get through the front lines! Read on to gain a good base understanding of iptables and its rules. Ha-dou-ken! . The link for this article located at SearchEnterpriseLinux.com is no longer available. . The link for this article located at SearchEnterpriseLinux.com is no longer available.. 'spamming', different, context, necessarily, email, specific. . Brittany Day
Jul 20, 2007
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Firewalls
74
network monitoringbandwidth managementiptables usageEmploying Iptables for Effective Bandwidth Management on Linux Systems
Linux has a number of useful bandwidth monitoring and management programs. A quick search on Freshmeat.net for bandwidth returns a number of applications. However, if all you need is a basic overview of your total bandwidth usage, iptables is all you really need -- and it's already installed if you're using a Linux distribution based on the 2.4.x or 2.6.x kernels. Most of the time we use iptables to set up a firewall on a machine, but iptables also provides packet and byte counters. Every time an iptables rule is matched by incoming or outgoing data streams, the software tracks the number of packets and the amount of data that passes through the rules. . It is easy to make use of this feature and create a number of "pass-through rules" in the firewall. These rules do not block or reroute any data, but rather keep track of the amount of data passing through the machine. By using this feature, we can build a simple, effective bandwidth monitoring system that does not require additional software. The link for this article located at Linux.com is no longer available. . It is easy to make use of this feature and create a number of 'pass-through rules' in the firewall. . linux, number, useful, bandwidth, monitoring, management, programs, quick, search, freshme. . Benjamin D. Thomas
Dec 27, 2005
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Network Security
72
network securitysecurity strategiesfirewall managementAnalyze Packet Handling In Firewalls: Reject Versus Deny Decision Impact
... there are a number of issues considered all too rarely by firewall administrators. Most IP level firewalls have a number of options for handling a packet. The packet can typically be accepted, dropped, or sent through another set of rules for inspection (allowing you to break up your ruleset into more manageable pieces). . .. ... there are a number of issues considered all too rarely by firewall administrators. Most IP level firewalls have a number of options for handling a packet. The packet can typically be accepted, dropped, or sent through another set of rules for inspection (allowing you to break up your ruleset into more manageable pieces) When blocking a packet, you are faced with an important choice; whether to drop it silently, or generate an ICMP error message. Each choice has several advantages, and also creates a variety of potential problems. If you generate an error message (i.e. ICMP unreachable), then the remote end will usually immediately stop trying to connect. This makes detecting some types of port scans more difficult since the remote end will likely send off only one packet, and give up after it receives the first error message. This also makes "shotgun" port scanning (i.e. where the attacker simply tries several thousand ports in rapid order) much easier, since the software will receive a definitive answer as to whether the port is blocked or not. Sending an error message does have several advantages, though, the primary one being to make life more difficult for someone who wants to spoof your IP addresses. Since your firewall is likely to generate ICMP error messages, the victim being attacked (by what looks like packets from your systems) will know something is up. To prevent you from sending error messages the attacker must take you offline, or otherwise act overtly to prevent data getting from the victim's network to yours and back. The link for this article located at SecurityPortal is no longer available. . ... there are a number of issuesconsidered all too rarely by firewall administrators. Most IP level. there, number, considered, rarely, firewall, administrators, level. . Anthony Pell
May 23, 2001
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Firewalls
72
security toolnetwork managementfirewall rulesConstructing Packet Filtering Firewalls With Mason Tool
Using the Mason firewall tool, you can easily construct a packet filtering firewall. Mason constructs a firewall for you by listening on your network for normal data and building the rules accordingly. . . .. Using the Mason firewall tool, you can easily construct a packet filtering firewall. Mason constructs a firewall for you by listening on your network for normal data and building the rules accordingly. The link for this article located at William Sterns on LinuxMo is no longer available. . Implement Mason's firewall to develop a robust packet filtering mechanism that dynamically aligns with the regular traffic patterns of your network.. Mason Firewall, Packet Filtering, Network Management. . Anthony Pell
Mar 08, 2000
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Firewalls
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