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1<?xml version='1.0' encoding='UTF-8'?> 1<?xml version='1.0' encoding='UTF-8'?>
2<!-- $Header: /var/cvsroot/gentoo/xml/htdocs/doc/en/home-router-howto.xml,v 1.5 2004/07/27 00:58:04 vapier Exp $ --> 2<!-- $Header: /var/cvsroot/gentoo/xml/htdocs/doc/en/home-router-howto.xml,v 1.6 2004/07/30 02:46:39 vapier Exp $ -->
3<!DOCTYPE guide SYSTEM "/dtd/guide.dtd"> 3<!DOCTYPE guide SYSTEM "/dtd/guide.dtd">
4 4
5<guide link="/doc/en/home-router-howto.xml"> 5<guide link="/doc/en/home-router-howto.xml">
6 6
7<title>Home Router Guide</title> 7<title>Home Router Guide</title>
290DHCP is exactly what its name implies. It's a protocol that allows you 290DHCP is exactly what its name implies. It's a protocol that allows you
291to dynamically configure other hosts automatically. You run a DHCP 291to dynamically configure other hosts automatically. You run a DHCP
292server on the router (dhcpd), give it all the information about your 292server on the router (dhcpd), give it all the information about your
293network (valid IPs, DNS servers, gateways, etc...), and then when the 293network (valid IPs, DNS servers, gateways, etc...), and then when the
294other hosts start up, they run a DHCP client to automatically configure 294other hosts start up, they run a DHCP client to automatically configure
295themselves. No fuss, no muss! For even more information, you can 295themselves. No fuss, no muss! For more information about DHCP, you can
296always visit <uri link="http://en.wikipedia.org/wiki/DHCP">Wikipedia</uri>. 296always visit <uri link="http://en.wikipedia.org/wiki/DHCP">Wikipedia</uri>.
297</p> 297</p>
298 298
299<pre caption="Setting up dhcpd"> 299<pre caption="Setting up dhcpd">
300# <i>emerge dhcp</i> 300# <i>emerge dhcp</i>
337When people want to visit a place on the internet, they remember names, 337When people want to visit a place on the internet, they remember names,
338not a string of useless numbers. After all, what's easier to remember, 338not a string of useless numbers. After all, what's easier to remember,
339ebay.com or 66.135.192.87? This is where the DNS steps in. DNS servers 339ebay.com or 66.135.192.87? This is where the DNS steps in. DNS servers
340run all over the internet, and whenever someone wants to visit 'ebay.com', 340run all over the internet, and whenever someone wants to visit 'ebay.com',
341these servers turn 'ebay.com' (what we understand) into '66.135.192.87' 341these servers turn 'ebay.com' (what we understand) into '66.135.192.87'
342(what our computers understand). For even more information, you can 342(what our computers understand). For more information about DNS, you can
343always visit <uri link="http://en.wikipedia.org/wiki/DNS">Wikipedia</uri>. 343always visit <uri link="http://en.wikipedia.org/wiki/DNS">Wikipedia</uri>.
344</p> 344</p>
345 345
346<p> 346<p>
347You may have noticed in the previous section that we told the DHCP 347You may have noticed in the previous section that we told the DHCP
385<p> 385<p>
386This is where NAT steps in. NAT is a way of connecting multiple computers 386This is where NAT steps in. NAT is a way of connecting multiple computers
387in a private LAN to the internet when you only have a smaller number of 387in a private LAN to the internet when you only have a smaller number of
388IP addresses availabe to you. Typically you were given 1 IP by your ISP, 388IP addresses availabe to you. Typically you were given 1 IP by your ISP,
389but you want to let your whole house connect to the internet. NAT is the 389but you want to let your whole house connect to the internet. NAT is the
390magic that makes this possible. For even more information, you can 390magic that makes this possible. For more information about NAT, you can
391always visit <uri link="http://en.wikipedia.org/wiki/NAT">Wikipedia</uri>. 391always visit <uri link="http://en.wikipedia.org/wiki/NAT">Wikipedia</uri>.
392</p> 392</p>
393 393
394<note> 394<note>
395Before we get started, make sure you have iptables on your system. Although 395Before we get started, make sure you have iptables on your system. Although

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