After getting IP address from (Surfboard) cable modem's DHCP, which should be in the 172.26.160.x range, you can query a special DNS for the IP of "cable.netvision.net.il". The IPs of the DNS are: 192.168.101.101 and 192.168.101.102
Unless your default gateway is through the IP given to you by the cable modem, you will need to add a route to those IP addresses:
$ /sbin/route add 192.168.101.101 dev $DEV
$ /sbin/route add 192.168.101.102 dev $DEV
Where $DEV is eth0, eth1, or whatever interface is connected to the cable modem and got an IP from it.
Then to find the IP addreses of cable.netvision.net.il (there may be more then 3 different IPs):
$ nslookup cable.netvision.net.il 192.168.101.101
$ nslookup cable.netvision.net.il 192.168.101.102
Some of the IPs:
212.143.209.14
212.143.206.115
212.143.206.11
212.143.209.15
212.143.206.5
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