On Sb, 04 sep 10, 21:48:16, peasthope@shaw.ca wrote: > Does anyone know of documentation for a Linux hub or a Linux > switch? The simplest example I can think of is a system with > a gateway interface transmitting packets for multiple addresses > and subordinate interfaces transmitting packets for one or all > addresses except for the address of the machine itself. Be careful what you ask for, hub/switch in networking context means those devices (operating at layer 1 & 2, aka Ethernet in most configs) used for physically connecting multiple computers, usually belonging to the same layer 3 & 4 network (TCP/IP) ;) AFAICT, what you ask for is a gateway/router. Here is a very short tutorial: ,----[ /etc/network/interfaces ] | # the Internet interface, assuming a static config | # as received from the Internet provider | iface eth0 inet static | address xxx.xxx.xxx.xxx # this is your Internet IP address | netmask 255.255.255.0 | gateway xxx.xxx.xxx.xxx # this is your gateway to the Internet | dns-nameservers xxx.xxx.xxx.xxx xxx.xxx.xxx.xxx | | # internal network, where this computer is the gateway | iface eth1 inet static | address 192.168.0.1 | netmask 255.255.255.0 `---- Install resolvconf, shorewall, dnsmasq. For shorewall first you need to he files contained in /usr/share/doc/shorewall-common/default-config to /etc/shorewall/ and then adjust a few of them according to the example in /usr/share/doc/shorewall-common/examples/two-interfaces (all paths from memory as both gateways I administer remotely are currently shut-down). Also don't forget to set IP_FORWARDING=On (instead of Keep) in /etc/shorewall/shorewall.conf. On a client machine you only need the package resolvconf and: ,----[ /etc/network/interfaces ] | iface eth0 inet static | address 192.168.0.xx # anything else but 192.168.0.1 | netmask 255.255.255.0 | gateway 192.168.0.1 | dns-nameservers 192.168.0.1 # yes, the gateway, because we have dnsmasq `---- If you want your gateway to also provide DHCP just uncomment one example that suits you in /etc/dnsmasq.conf and restart dnsmasq. On the client side you only need: iface eth0 inet dhcp To connect multiple computers you need an Ethernet switch, preferably with auto-crossover or even Gigabit capabilities (a hub would also do, but I doubt you can still buy one...). You can also add a network card for each additional internal computer and use bridge-utils to create a bridge. This way your gateway will also act as a switch ;) This setup is very flexible and can be extended in several ways depending on your needs. Regards, Andrei -- Offtopic discussions among Debian users and developers: http://lists.alioth.debian.org/mailman/listinfo/d-community-offtopic
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