Secure Programming Studies in secure programming for admins

Oct 31, 2005

Like a poison apple, a Web program that is tasty on the surface may contain a highly dangerous core. Admins who do their own programming need to follow secure programming practices to avoid the bitter taste of insecurity.

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Squid proxy server Implementing a home proxy server with Squid

Oct 31, 2005

A proxy server provides safer and more efficient surfing. Although commercial proxy solutions are available, all you really need is Linux and an old PC in the attic.

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XSA Attack Stopping the cross-site authentication attack

Oct 31, 2005

A new form of phishing attack deposits an HTML tag on the vulnerable service to trap users into authenticating.

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Admin Workshop: Resolvers Insider Tips: Resolving Names in DNS

Sep 30, 2005

The resolver is the window from your computer to the global DNS system. Simply typing a URL awakens a link to computers all over the world.

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Books

Sep 30, 2005
Classic Shell Scripting Ending Spam Hardening Linux...
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Charly's Column The Sysadmin’s Daily Grind: Portfwd

Aug 31, 2005

Incoming 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.

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TCP Hijacking Understanding and preventing TCP attacks

Aug 31, 2005

It 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.

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Socks 5 Examining the generic Socks version 5 proxy protocol

Jun 30, 2005

Socks 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.

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