187 lines
3.2 KiB
HTML
187 lines
3.2 KiB
HTML
<HTML
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>The firewall scripts files</TITLE
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TITLE="Networking -Management, Firewall, Masquerading and Forwarding"
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HREF="net-manage.html"><LINK
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TITLE="Source Address Filtering"
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HREF="chap10sec101.html"><LINK
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Config /etc/rc.d/init.d/firewall script file -Web Server"
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>Securing and Optimizing Linux: RedHat Edition -A Hands on Guide</TH
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>Chapter 11. The firewall scripts files</A
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><DT
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>Table of Contents</B
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><DT
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>11.1. <A
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HREF="chap11sec102.html"
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>Config <TT
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CLASS="filename"
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>/etc/rc.d/init.d/firewall</TT
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> script file -Web Server</A
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></DT
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><DT
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>11.2. <A
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HREF="chap11sec103.html"
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>Config <TT
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CLASS="filename"
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>/etc/rc.d/init.d/firewall</TT
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> script file - Mail Server</A
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> The tool <TT
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CLASS="literal"
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>ipchains</TT
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> allows you to set up firewalls, IP masquerading, etc. <TT
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CLASS="literal"
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>Ipchains</TT
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> talks to the kernel and tells it what packets to filter. Therefore all your firewall setups are stored in the kernel, and thus
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will be lost on reboot. To avoid this, we recommend using the System <TT
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CLASS="literal"
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>V</TT
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> init scripts to make your rules permanent. To do this, create a firewall script file like shown over the next three sections in your
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<TT
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CLASS="filename"
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>/etc/rc.d/init.d/</TT
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> directory for each servers you have. Of course, each server has different services to offer and needs a different firewall setup. For this reason, we
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provide you three different firewall settings, which you can play with, and examine to fit your needs. Also I assume that you have a minimum knowledge on how filtering firewalls and firewall rules works.
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</P
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>Source Address Filtering</TD
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>Config <TT
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CLASS="filename"
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>/etc/rc.d/init.d/firewall</TT
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> script file -Web Server</TD
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