Linux Compiler functionality.Overview
We are now at one of the most interesting points-where we will compile and install all the services that we wish to offer in our Linux server. Before we begin to explain how to compile and install server software with all the necessary securities and optimizations that we will need on our server, it is important to know the commands and programs we’ll use often to do the job. First of all, we must ensure that we have the necessary packages needed to make compilations on our system. These packages must be installed on your server or you’ll not be able to compile programs. (Далее…)
IPCHAINS Administrative Tools
The commands listed below are some tools that we use often, but many more exist, and you should check the man page and documentation for more details and information.
ipchains (Далее…)
Deny access to some address
Sometimes you’ll know an address that you would like to block from having any access at all to your server. You can do that by creating the rc.firewall.blocked file under 7etc/rc.d/” directory and uncomment the following lines in your firewall rules scripts file: (Далее…)
Configuration of the “/etc/rc.d/init.d/firewall” script file for the Gateway Server
This is the configuration script file for our Gateway Server. This configuration allows unlimited traffic on the Loopback interface, ICMP, DNS Server and Client (53), SSH Server and Client (22), HTTP Server and Client (80), HTTPS Server and Client (443), POP Client (110), NNTP NEWS Client (119), SMTP Server and Client (25), I MAP Server (143), IRC Client (6667), ICQ Client (4000), FTP Client (20, 21), RealAudio / QuickTime Client, and OUTGOING TRACEROUTE requests by default. (Далее…)
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Build a kernel with Firewall Masquerading and Forwarding support
Once again, the first thing you need to do is ensuring that your kernel has been built with Network Firewall support enabled and Firewalling. In the 2.2.14 kernel version you need to ensure that you have answered Y to the following questions:
Networking options: (Далее…)