. (shorewall) ADSL fail-over. ADSL - . ADSL ( ) telnet . . . shorewall iptables ( ?), , etc.

. . :

 ip  192.168.1.0 /24 bsnl  192.168.1.10 src dev eth1
 ip      bsnl  192.168.1.1
 ip  192.168.0.0 /24  tata 192.168.0.10 src dev eth2
 ip       tata 192.168.0.1
 ip   bsnl  192.168.1.10
 ip    tata 192.168.0.10
 ip  nexthop       nexthop  1 dev eth1 192.168.1.1   4 dev eth2 192.168.0.1

. eth2 , eth1 . :
1.
2.
3. shorewall ( )

.