Starting Squid

Use the chkconfig configure Squid to start at boot::

[root@bigboy tmp]# chkconfig squid on

Use the service command to start, stop, and restart Squid after booting:

[root@bigboy tmp]# service squid start

[root@bigboy tmp]# service squid stop

[root@bigboy tmp]# service squid restart

You can test whether the Squid process is running with the pgrep command:

[root@bigboy tmp]# pgrep squid

You should get a response of plain old process ID numbers.

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A howto for DD-WRT 

********Warning ********
Following these instructions will invalidate your Linksys warranty. You do so at your own risk. These instructions assume that you have an understanding of Linux, PHP MySQL and Apache. If you brick your AP you might get it back by holding down the reset pin for 20 seconds, unplug the power while still holding down the reset button for another 20 seconds and then plugging the power back in while still keeping the reset button held in for a further 20 seconds. This should bring it back to the defaults of whatever firmware you have installed. You should be able to login to 192.168.1.1*******End of Warning********

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This is a Linux command line reference for common operations.
Examples marked with • are valid/safe to paste without modification into a terminal, so
you may want to keep a terminal window open while reading this so you can cut & paste.
All these commands have been tested on Fedora and Ubuntu.

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Introduction

Network security is a primary consideration in any decision to host a website as the threats are becoming more widespread and persistent every day. One means of providing additional protection is to invest in a firewall. Though prices are always falling, in some cases you may be able to create a comparable unit using the Linux iptables package on an existing server for little or no additional expenditure.

This chapter shows how to convert a Linux server into:

• A firewall while simultaneously being your home website’s mail, web and DNS server.
• A router that will use NAT and port forwarding to both protect your home network and have another web server on your home network while sharing the public IP address of your firewall.

Creating an iptables firewall script requires many steps, but with the aid of the sample tutorials, you should be able to complete a configuration relatively quickly.

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