I have been using a 486-DX-120 [ using RH 5.2 and ipfwadm ] and have
been experimenting with the amount of RAM installed. I have been told
that ppp moves the data at the kernel level and a lot of ram is not
necessary.
I have tried using the setup with both 8 meg and 16 meg of ram and the
data transfer performance appears to be the same with either amount of
ram.
My 120 mhz processer didn't seem to be a good match for this mother
board but still gave good performance so I really think your 486 DX 66
would work just fine.
[ by the way I have temporarily shut down this box as I am upgrading it
to RH-6.1 and IPChains... I will be upgrading the motherboard and
processer to a Pentium
... I might be willing to part with the 486-DX-120 CPU cheap if you want
? ]
Good luck
Timothy Lillicrap wrote:
>
> I have a 486DX 66mhz which I am thinking of using as a firewall/gateway in a
> similar manor. Unfortunately I live in the country and have to use a dialup
> connection. At the moment I have a pentium 200 mhz which is serving as the
> firewall/gateway, but I would like to use it for something else as it seems a
> waste to use just for the gateway.
>
> I understand that there will always be some sort of overhead when using a
> firewall. My question is - will I notice a difference if I switch from a
> pentium 200 to a 486 66 as my gateway. I thought that because I am on dialup
> that I may not even notice the difference due to the fact that so little
> throughput is happening (4-5K a second).
>
> Could anyone tell me if I should expect to see a difference????
>
> thanks
>
> Timothy Lillicrap
>
> >
> > It is this rewriting of headers that consumes CPU time and actually
> > slows the system. While I get 1.1MB down with my DSL when a machine is
> > directly connected to the DSL modem, I find there is roughly a 20% lug
> > on speed when going through the 486SX firewall. Speed drops to 850 to
> > 900MB down behind the Linux firewall.
> >
> > Eventually I plan to upgrade to a Pentium firewall as the prices for
> > the 90MZ to 166MZ machines drops to near zero. PCI NIC's should also
> > help. However, there is always going to be overhead when running a
> > firewall. Protection does not come with zero cost.
> >
> >
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