linux firewall

A long time ago I wrote about Linux command line bittorrent client. Recently I switched from command line client to a GUI based client called Deluge. Deluge is a lightweight, open source free software and cross-platform BitTorrent client (bt client). A Bittorrent client written in Python/PyGTK which offers following benefits: [a] Full Encryption – To […]

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Iptables provides the option to log both IP and TCP headers in a log file. This is useful to: => Detect Attacks => Analyze IP / TCP Headers => Troubleshoot Problems => Intrusion Detection => Iptables Log Analysis => Use 3rd party application such as PSAD (a tool to detect port scans and other suspicious […]

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From my mail bag: How do I accept CIPE connection requests coming from the outside? CIPE stands for Crypto IP Encapsulation (see howto Establishing a CIPE Connection) . It is used to configure an IP tunneling device. For example, CIPE can be used to grant access from the outside world into a Virtual Private Network […]

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Someone might attack on your system. You can drop attacker IP using IPtables. However, you can use route command to null route unwanted traffic. A null route (also called as blackhole route) is a network route or kernel routing table entry that goes nowhere. Matching packets are dropped (ignored) rather than forwarded, acting as a […]

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If you’re new to Linux, here’s a simple firewall that can be setup in minutes. Especially those coming from a Windows background, often lost themselves while creating linux firewall. This is the most common question asked by Linux newbies (noobs). How do I install a personal firewall on a standalone Desktop Linux computer. In other […]

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One of my friend recently send me an email. It reads as follows: “…My DSL service providers DNS server seems to be little slow, they have two servers it takes little time (some time upto 2 seconds) to resolve a domain name, once domain resolved, browsing speed remains the same, what should I do to […]

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