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Contents What is Bridging? Installing a Bridge Configuring a Bridge What is a Bridging Firewall? Installing a Bridging Ebtables Firewall Configuring a Bridging Ebtables Firewall Installing a Bridging Iptables Firewall Configuring a Bridging Iptables Firewall What is an Intrusion Prevention System? Installing an Intrusion Prevention System Configuring an Intrusion Prevention System What is Bridging? […] What Is Stealth Firewalling with Linux?Simply put, a stealth firewall is an Ethernet bridge with filtering capabilities. This means that it’s a firewall that operates at Layer 2 of the OSI model, leveraging netfilter rules and chains (Linux’s firewall system) applied to the bridge. For those not familiar with what a bridge is: an Ethernet […] Another way of achieving the same thing is to add an iptable redirection rule. We have done it this way, because we didn’t want to add the xinit package to our standard configuration. These instructions were created on a Debian Lenny system. Create a new “if-up” script:sudo vim /etc/network/if-up.d/jira-redirect Make this its content: #!/bin/bashfor i […] -A FORWARD -s 192.168.0.232 -m string –string “facebook.com” –algo kmp –to 65535 -j ACCEPTA FORWARD -m string –string “youtube.com” –algo kmp –to 65535 -j DROP-A FORWARD -m string –string “facebook.com” –algo kmp –to 65535 -j DROP-A FORWARD -m string –string “meebo.com” –algo kmp –to 65535 -j DROP I have been using the minimal iso (CentOS-6.0-x86_64-minimal.iso) to install CentOS 6. I wanted to add a GUI to my vm, but I could not find easy documentation showing how to add a GUI, or Gnome in this case, to a CentOS 6 minimal install. I was not looking for the smallest X windows install, […] Below Rules will block few of the Nmap Scans on ur linux server The default config files of IPtables for RHEL / CentOS / Fedora Linux are located here /etc/sysconfig/iptables – iptables -A INPUT -p tcp –tcp-flags ALL FIN -j DROP iptables -A INPUT -p tcp –tcp-flags ALL NONE -j DROP iptables -A INPUT […] How do I configure a host-based firewall called Netfilter (iptables) under CentOS / RHEL / Fedora / Redhat Enterprise Linux? Netfilter is a host-based firewall for Linux operating systems. It is included as part of the Linux distribution and it is activated by default. This firewall is controlled by the program called iptables. Netfilter filtering […] Install java in centos 1. Download bin file using below command wget http://download.oracle.com/otn-pub/java/jdk/6u27-b07/jdk-6u27-linux-i586.bin If the link is not working, Please use the below link, If you need latest one download it. http://www.oracle.com/technetwork/java/javase/downloads/index.html 2. After download complete it look like jdk-6u26-linux-x64.bin?e=1312191174&h=c5f0b98f8ea25aca97f3b53be8497570 so we need to rename the file using below command, mv jdk-6u26-linux-x64.bin?e=1312191174&h=c5f0b98f8ea25aca97f3b53be8497570 jdk-6u4-linux-x64.bin […] Installing and configuring Shorewall in CentOS Netfilter is a packet filtering in Linux 2.4.x and 2.6.x kernels Enables packet filtering (network address and port), NAT and other packages. Redesigned and highly improved from the previous kernel 2.2.x, ipchains and ipfwadm kernel 2.0.x. Netfilter is a set of structures within the kernel that allows modules to […] Fast SCP SCP is a great way to copy files from somewhere to somewhere else, but as we all know it can be slower than (insert slow metaphor here). Here’s a way you can get way speedier(really a word?) transfers using scp. scp -c arcfour -C sourcefile desthost: BY This way we can copy the […] |
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