Charly's Column The Sysadmin’s Daily Grind: Portfwd
Aug 31, 2005Incoming TCP connections do not always end up where they are supposed to. A freely configurable redirector points digital debris in the direction of a new and better place.
more »TCP Hijacking Understanding and preventing TCP attacks
Aug 31, 2005It is quite easy to take a TCP connection down using a RST attack, and this risk increases with applications that need long-term connections, such as VPNs, DNS zone transfers, and BGP. We’ll describe how a TCP attack can happen, and we’ll show you some simple techniques for protecting your network.
more »Socks 5 Examining the generic Socks version 5 proxy protocol
Jun 30, 2005Socks is a universal proxy protocol for TCP and UDP that allows internal hosts to securely pass the firewall and authenticates users. This article describes the latest version of the Socks proxy protocol and shows how to implement it.
more »ARP Spoofing ARP spoofing and poisoning
Jun 30, 2005Any user on a LAN can sniff and manipulate local traffic. ARP spoofing and poisoning techniques give an attacker an easy way in.
more »Security Intro Knowing the ways of the enemy
Jun 30, 2005more »
SSPE Security Policies SSPE: Managing security policies for multiple firewalls
Jun 30, 2005The Simple Security Policy Editor (SSPE) helps you organize your network and keep track of security policies across multiple firewalls. You can reference a central policy to generate rulesets for packet filters and VPN gateways.
more »Books
Jun 30, 2005more »
Charly's Column The Sysadmin’s Daily Grind: Mail and Queuegraph
May 31, 2005Worms, mail bombs, and users who send multiple megabyte Powerpoint files across the wire give Postfix administrators plenty of reasons to view their charges with a critical eye from time to time.
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News
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TUXEDO Computers Unveils Linux Laptop Featuring AMD Ryzen CPU
This latest release is the first laptop to include the new CPU from Ryzen and Linux preinstalled.
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XZ Gets the All-Clear
The back door xz vulnerability has been officially reverted for Fedora 40 and versions 38 and 39 were never affected.
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Canonical Collaborates with Qualcomm on New Venture
This new joint effort is geared toward bringing Ubuntu and Ubuntu Core to Qualcomm-powered devices.
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Kodi 21.0 Open-Source Entertainment Hub Released
After a year of development, the award-winning Kodi cross-platform, media center software is now available with many new additions and improvements.
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Linux Usage Increases in Two Key Areas
If market share is your thing, you'll be happy to know that Linux is on the rise in two areas that, if they keep climbing, could have serious meaning for Linux's future.
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Vulnerability Discovered in xz Libraries
An urgent alert for Fedora 40 has been posted and users should pay attention.
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Canonical Bumps LTS Support to 12 years
If you're worried that your Ubuntu LTS release won't be supported long enough to last, Canonical has a surprise for you in the form of 12 years of security coverage.
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Fedora 40 Beta Released Soon
With the official release of Fedora 40 coming in April, it's almost time to download the beta and see what's new.
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New Pentesting Distribution to Compete with Kali Linux
SnoopGod is now available for your testing needs
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Juno Computers Launches Another Linux Laptop
If you're looking for a powerhouse laptop that runs Ubuntu, the Juno Computers Neptune 17 v6 should be on your radar.