routing 2 domains

[Francesc Guasch <frankie @ citel . upc . es>]

I need to know if this can be done :

example inside

  a.b.c.3---|
	    |
  a.b.c.4---|
	    ---fw---cisco---- outside (internet)
  x.y.z.3---|
	    |
  x.y.z.4---|

Inside there are computers with ip addresses from two
different ISPs and I'm wondering if I could set up
a linux firewall that could handle this

Thanks in advance
-- 
 ^-^_-----\            mailto:frankie @
 citel .
 upc .
 es
 o o       )           http://www.etsetb.upc.es/~frankie
  Y (_ (___(ssss       phone: (343) 401 6809

All those moments will be lost in time, like tears in the rain.

begin:          vcard
fn:             Francesc Guasch
n:              Guasch;Francesc
org:            UPC
email;internet: frankie @
 citel .
 upc .
 es
x-mozilla-cpt:  ;0
x-mozilla-html: FALSE
end:            vcard