i use ipcop on a small network
-setups is handy, stick in the cd and go,
-will work fine on an old box, no keyboard/mouse/monitor required
-can handle multiple interfaces in multiple configurations (e.g. for
youre lan, wireless, dmz, etc) and managment is easy also
-the whole lot is controlled through a nice web interface, though you
may need to use the shell from once in a blue moon
-can set it up to allow remote access/administration
For a firewall I've found it great for that network.
If you want extra functionality, you can get 'plugins' from third
parties, it has a wide user base and there's lots of plugins
available, though i haven't used them
- DansGuardian for web content filtering (nanny type stuff)
- OpenVpn if you use it instead of ipsec
It has basic traffic shaping, that i haven't used either.
I also has nice graphs of various system and usage aspects, and a web
proxy, dhcp server, time server, dynamic dns etc etc
And an active support/user mailing list, which is always good.
If you have an old spare machine, I'd say try it out.
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