linux lets you setup filters based on the interface name (i.e. ppp0, ppp1,
etc) so you can firewall a modem port just as you would a ethernet port.
On Mon, 22 Dec 1997 mht @
> Another suggestion would be Livingston Enterprises (www.livingston.com),
> RADIUS, Portmasters, and Routers.
> At 07:48 AM 12/22/97 -0800, Stackpole, Bill wrote:
> >I don't know of any firewall that support modems as interfaces but most
> >dial-in access servers support user authentication and have the ability
> >to limit the access of the caller. Cisco using TACACS+ allows you to
> >assign a packet filter (access-list) based on the user ID. Microsoft
> >also has some filters and security measures that can be applied but
> >nothing that would constitute a "firewall." My suggestion would be a
> >separate segment off the your firewall for the dial-in server. Assign a
> >set of unique IP addresses to the dial-in ports and management
> >separately through the firewall.