Descrivo alcune semplici operazioni possibili con il comando ROUTE
con i quali si può cambiare gateway predefinito su Windows

Syntax route [-f] [-p] [Command[Destination] [mask Network] [Gateway] [metric Metric]] [if Interface]]

Example:

To display the entire contents of the IP routing table, type:

route print

To display the routes in the IP routing table that begin with 10., type:

route print 10.*

To add a default route with the default gateway address of 192.168.12.1, type:

route add 0.0.0.0 mask 0.0.0.0 192.168.12.1

To add a route to the destination 10.41.0.0 with the subnet mask of 255.255.0.0 and the next hop address of 10.27.0.1 , type:

route add 10.41.0.0 mask 255.255.0.0 10.27.0.1

To add a persistent route to the destination 10.41.0.0 with the subnet mask of 255.255.0.0 and the next hop address of 10.27.0.1, type:

route -p add 10.41.0.0 mask 255.255.0.0 10.27.0.1

To add a route to the destination 10.41.0.0 with the subnet mask of 255.255.0.0, the next hop address of 10.27.0.1, and the cost metric of 7, type:

route add 10.41.0.0 mask 255.255.0.0 10.27.0.1 metric 7

To add a route to the destination 10.41.0.0 with the subnet mask of 255.255.0.0, the next hop address of 10.27.0.1, and using the interface index 0×3, type:

route add 10.41.0.0 mask 255.255.0.0 10.27.0.1 if 0×3

To delete the route to the destination 10.41.0.0 with the subnet mask of 255.255.0.0, type:

route delete 10.41.0.0 mask 255.255.0.0

To delete all routes in the IP routing table that begin with 10., type:

route delete 10.*

To change the next hop address of the route with the destination of 10.41.0.0 and the subnet mask of 255.255.0.0 from 10.27.0.1 to 10.27.0.25, type:

route change 10.41.0.0 mask 255.255.0.0 10.27.0.25

http://www.aoddy.com/2007/11/10/how-to-change-default-gateway-on-windows-by-command-line/

il pacchetto da installare si chiama dosemu ed è presente anche in synaptic (il packet manager per distro UBUNTU)

L’unica cosa è che una volta installato per farlo funzionare occorre apportare questa semplice modifica:

sudo gedit etc/sysctl.con

Cambiare il valore di vm.mmap_min_addr da “65536″ a “0″ (zero)

cosi:
vm.mmap_min_addr = 65536
a
vm.mmap_min_addr = 0

Salviamo il file e restartiamo il servizio relativo alle variabili d’ambiente nel kernel:

sudo /etc/init.d/procps restart

Ecco fatto!!! ora lanciando da terminale il comando : xdosemu apparirà una fantastica shell dos!!

per caricare i files da lanciare dal tuo dos salvarli in /etc/dosemu/freedos dove troverai anche i soliti AUTOEXEC.BAT E CONFIG.SYS

eNJoY!