Linux Tutorials on the topic “security”
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Firewall Access Policy Rulesets, Part 1
Author: vkfwb • Tags: security • Comments: 0Firewall Access Policy Rulesets, Part 1 This article continues the series of articles on Firewall Builder, a graphical firewall configuration and management tool that supports many Open Source firewall platforms as well as Cisco IOS access lists and Cisco ASA (PIX). This article explains key principles of the policy or access control rule sets in Firewall Builder. I plan to demonstrate examples of policy rules and how they translate into iptables, pf and Cisco IOS and PIX configurations in the next article of the series.
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Configuring fail2ban With SquirrelMail On CentOS 5.3/ISPConfig 3
Author: gscott187 • Tags: centos, email, security • Comments: 0Configuring fail2ban With SquirrelMail On CentOS 5.3/ISPConfig 3 This tutorial shows how you can prevent unlimited login attempts and hence brute force attacks against your SquirrelMail web login by using fail2ban.
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Using Built-in Policy Importer In Firewall Builder
Author: vkfwb • Tags: security • Comments: 0Using Built-in Policy Importer In Firewall Builder This article continues the series of articles on Fireall Builder, a graphical firewall configuration and management tool that supports many Open Source firewall platforms as well as Cisco IOS access lists and Cisco ASA (PIX). This article demonstrates how you can import existing iptables or Cisco router configuration into Firewall Builder.
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Using DNS Name Object In Firewall Builder
Author: vkfwb • Tags: security • Comments: 0Using DNS Name Object In Firewall Builder This article continues the series of articles on Fireall Builder, a graphical firewall configuration and management tool that supports many Open Source firewall platforms as well as Cisco IOS access lists and Cisco ASA (PIX). This article demonstrates how you can build firewall rules matching DNS A records.
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Using Address Table Object In Firewall Builder
Author: vkfwb • Tags: security • Comments: 0Using Address Table Object In Firewall Builder This article continues the series of articles on Fireall Builder, a graphical firewall configuration and management tool that supports many Open Source firewall platforms as well as Cisco IOS access lists and Cisco ASA (PIX). This article demonstrates how you can build firewall rules matching sets of ip addresses stored in external files.
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Using Custom Service Object In Firewall Builder
Author: vkfwb • Tags: security • Comments: 1Using Custom Service Object In Firewall Builder This article continues the series of articles on Fireall Builder, a graphical firewall configuration and management tool that supports many Open Source firewall platforms as well as Cisco IOS access lists and Cisco ASA (PIX). This article demonstrates how you can work with the Custom Service object in Firewall Builder.
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How To Defend slowloris DDoS With mod_qos (Apache2 On Debian [Lenny])
Author: MarcusSpiegel •
Tags: linux, apache, security, debian, linux, apache, security •
Comments: 6 How To Defend slowloris DDoS With mod_qos (Apache2 On Debian [Lenny]) mod_qos gives some fine-grained opportunities to scale the number of used connections and to defend an attack according to bandwidth limits. Unfortunately it is only available as source-package and there are many possible settings, wich might be hard to setup for this special case. So I provide the way that helped me.
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Using ICMP And ICMP6 Service Objects In Firewall Builder
Author: vkfwb • Tags: security • Comments: 0Using ICMP And ICMP6 Service Objects In Firewall Builder This article continues the series of articles on Fireall Builder, a graphical firewall configuration and management tool that supports many Open Source firewall platforms as well as Cisco IOS access lists and Cisco ASA (PIX). This article demonstrates how you can work with ICMP and ICMP6 service objects in Firewall Builder.
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Squid Proxy Server On Ubuntu 9.04 Server With DansGuardian, ClamAV, And WPAD (Proxy Auto-Detection) [Updated 07-08-09]
Author: mtcoombes •
Tags: security, ubuntu •
Comments: 19 Squid Proxy Server On Ubuntu 9.04 Server With DansGuardian, ClamAV, And WPAD (Proxy Auto-Detection) This tutorial will demonstrate how to set up a Squid Proxy server on Ubuntu 9.04 with DansGuardian (for content filtering) and ClamAV (for Virus scanning); in addition, we will set up Web Proxy AutoDetection (WPAD) through DHCP (in this case, either dhcp3 OR the Windows Server 2003 DHCP server) or DNS so that the only configuration necessary on the client side is to check "Auto-detect proxy settings for this network" in Firefox or Internet Explorer. At the end of the tutorial, users will have a fully functional and secure proxy for HTTP access. In addition, the final section will show users how to connect to this proxy server via SSH in order to have a protected browsing session while away from the home/office.
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Using TCP And UDP Service Object In Firewall Builder
Author: vkfwb • Tags: security • Comments: 0Using TCP And UDP Service Object In Firewall Builder This article continues the series of articles on Fireall Builder, a graphical firewall configuration and management tool that supports many Open Source firewall platforms as well as Cisco IOS access lists and Cisco ASA (PIX). This article demonstrates how you can work with TCP and UDP service objects in Firewall Builder.
