[LARTC] can all internet traffic be directed thru 1 computer on a Router?

[Ian stuart Turnbull]

Hello al,
Is it possible [indeed is this the right place] to add  iptables  to force 
all internet traffic to go thru a particular computer on a LAN?
I have a 4 port Router/modem that contains a Busybox v0.61 Linux system. I 
am able to add entries to the iptables tho' I don't really know what it does 
yet. I want to be able to use Ethereal on this one computer to check what 
web pages my children are visiting - being fairly strict I don't want them 
visiting some of the more perverse sites.
A friend told me this is possible.
Can anyone help please.

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