On Tue, 21 September 1999, John Fernandes wrote:
>
> If I use Linux to setup a gateway to the internet on a LAN ...
You can enable telnet(port 25) alone by editing your /etc/inetd.conf and disabling
all other services. But this not the way to go for a gateway. Instead, disable telnet,
ftp etc. (ie. inetd). Use an HTTP/FTP proxy such as Squid. If the users want direct
FTP,IRC, ICQ etc. you could enable "masquerading" through the Linux kernel (kernel
2.2.x). With masquerading, the users using your gateway seem to be directly connected
to the internet and need not telnet to your gateway...
That way, all your gateway needs running is a proxy server(you can take this off if
you masquerade HTTP requests also, but the proxy may be faster), and setup the proper
masquerading rules through
ipchains( use ipfwadm for pre-2.2.x kernels).
Bye,
--vml,
Model Engg. College,
Cochin
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