Making your Linux router fit in with CISHMar 11, 2001, 19:15 (3 Talkback[s])
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CISH is a shell and system control program for low overhead Linux routers. Built on top of the LRP floppy distribution, it takes over the system from the level of init and offers a configuration system closely similar to that of large traditional routers.
The traditional Unix shell environment is a fine place to be in when you are dealing with a general purpose server or workstation. Routers and network firewalls, however, fulfill a much more dedicated task. The configuration system used by CISH keeps all the relevant settings together and offers extensive context-sensitive help and command completion. This makes the shell extremely useful when configuring complex networking parameters, but an absolute dread if you want to use it to configure your Enligtenment themes: In fact you cannot edit them at all.
With the release of version 0.9.0, CISH is now fully on top of the Linux 2.2 kernel architecture. Through ipchains, extended access-lists can be configured and bound to individual network interfaces. Ethernet interfaces can be combined into a bridge device, with support for the Spanning Tree Protocol. By replacing the traditional boot sequence of the Linux/LRP system with a special purpose version of init, the router can boot faster and operate under tighter resource usage conditions.
You can find all the downloadable goodies, including a ready-to-boot disk image, on the CISH website at http://www.tarball.net/cish.
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