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Full Discussion: Configuration for a home LAN
Special Forums IP Networking Configuration for a home LAN Post 31171 by cbkihong on Sunday 3rd of November 2002 04:40:16 AM
Old 11-03-2002
Configuration for a home LAN

I would like to see if anybody can give me any insights on this issue. Possibly somebody may have posted something like this before but provided I couldn't find any matching threads in the forum search, I post it here.

I'm on GNU/Linux with iptables. I have a home LAN with the gateway connected to the Internet using DHCP (dhcpcd). The DNS, a public IP and other details are thus obtained from ISP and dynamically set this way (i.e. the gateway has a dynamic IP).

The internal hosts are manually configured with static private IPs. I have added rules to the gateway's init script to invoke iptables' NAT feature so that internal hosts can now access the Internet. However, the internal hosts do not have the DNS lookup servers configured, so only IPs can be specified as addresses. It works, just pretty inconvenient.

As a temporary solution I looked up the ISP's DNS server addresses and statically configure them individually on each internal host. However, in order to alleviate long-term configuration trouble from changing ISPs or the ISP suddenly changing the addresses of DNS servers, I would like to run a DHCP server on the gateway and have the DNS addresses obtained from dhcpcd available to the internal hosts on startup or whenever the DNS IP changes.

My question is: is this possible or would it be tedious to set up?
 

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WIRELESS(7)                                                  Linux Programmer's Manual                                                 WIRELESS(7)

NAME
wireless - Wireless Tools and Wireless Extensions SYNOPSIS
iwconfig iwpriv -a DESCRIPTION
The Wireless Extensions is an API allowing you manipulate Wireless LAN networking interfaces. It is composed of a variety of tools and configuration files. It is documented in more detail in the Linux Wireless LAN Howto. The Wireless Tools are used to change the configuration of wireless LAN networking interfaces on the fly, to get their current configura- tion, to get statistics and diagnose them. They are described in their own man page, see below for references. Wireless configuration is specific to each Linux distribution. This man page will contain in the future the configuration procedure for a few common distributions. For the time being, check the file DISTRIBUTIONS.txt included with the Wireless Tools package. DEBIAN 3.0 In Debian 3.0 (and later) you can configure wireless LAN networking devices using the network configuration tool ifupdown(8). File : /etc/network/interfaces Form : wireless-<function> <value> wireless-essid Home wireless-mode Ad-Hoc See also : /etc/network/if-pre-up.d/wireless-tools /usr/share/doc/wireless-tools/README.Debian SuSE 8.0 SuSE 8.0 (and later) has integrated wireless configuration in their network scripts. Tool : Yast2 File : /etc/sysconfig/network/wireless /etc/sysconfig/network/ifcfg-* Form : WIRELESS_<function>=<value> WIRELESS_ESSID="Home" WIRELESS_MODE=Ad-Hoc See also : man ifup info scpm ORIGINAL PCMCIA SCRIPTS
If you are using the original configuration scripts from the Pcmcia package, you can use this method. File : /etc/pcmcia/wireless.opts Form : *,*,*,*) ESSID="Home" MODE="Ad-Hoc" ;; See also : /etc/pcmcia/wireless File PCMCIA.txt part of Wireless Tools package AUTHOR
Jean Tourrilhes - jt@hpl.hp.com http://www.hpl.hp.com/personal/Jean_Tourrilhes/Linux/ SEE ALSO
iwconfig(8), iwlist(8), iwspy(8), iwpriv(8), iwevent(8). wireless-tools 4 March 2004 WIRELESS(7)
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