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> I am considering using a decent Linux machine to use as an IP Masq
>box. It would have two gigabit ethernet cards and would potentially
>"hide" 2000-3000 machines.
>
>Are there any problems that I might encounter? This machine would need
>to keep track of the megabytes sent and received hence the need for one
>HUGE table of ipfwadm-type commands, i.e. one line for each user for
>each direction.
Well I think your main problem would NOT be the amount of lines in your
ipchains setup... thats what the netmask is for. However, if you really
masquerade 2-3000 machines you might run out of high ports quickly. As
there is no setting in the kernel config for the amount of ports to be usen
by masquerading (by defaults ports 60000+) are used, you might need to
change the kernel source a bit.
TmL
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