Netfilter L7 Blocking protocols at Layer 7 with the L7 patch

Mar 01, 2006

If you need a tool for filtering protocols that doesn’t depend on the port, try L7, an IPTables patch that operates through regular expressions.

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Charly's Column The Sysadmin’s Daily Grind: Webalizer Xtended

Mar 01, 2006

Webalizer is a tool for analyzing web server logfiles. A new patch lets admins see what isn’t there.

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Charly's Column The Sysadmin’s Daily Grind: Mod_evasive

Jan 01, 2006

The Apache web server can fight back against DoS attacks. You just need a little help from Mod_evasive.

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Nmap Methods Understanding Nmap analysis techniques

Jan 01, 2006

How does the popular Nmap scanner identify holes in network security? In this article, we examine some Nmap analysis techniques.

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Charly's Column The Sysadmin’s Daily Grind: Sarg

Dec 01, 2005

A busy proxy server is something that no self-respecting admin should leave to its own devices. The Squid logfile analyzer, dubbed Sarg by its author, helps you keep your Squid servers on track.

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Charly's Column The Sysadmin’s Daily Grind: Tor

Nov 01, 2005

Some people don’t mind leaving traces of their IP address wherever they go, others prefer to use a tool like The Onion Router.

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Java Anonymous Proxy Anonymous surfing with Java Anonymous Proxy

Nov 01, 2005

Many Websites log IP addresses and access times to identify users. If you don’t want to wind up as data in someone’s market research, the Java Anonymous Proxy will keep your surfing secret.

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Secure Programming Studies in secure programming for admins

Nov 01, 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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