I have a wireless netgear router (WGR614v5) and i connect to vpn. When
i'm connected, i don't ping addresse in busineess network. Which port
must I open so that ping respond.

I have open port : # Service Name Start Port End Port Server IP Address
1 IPTUNNEL2 2010 2010 192.168.1.3
2 vptunnel 25 25 192.168.1.3
3 AUTHGW 353 353 192.168.1.3
4 PPTP 1723 1723 192.168.1.3
5 L2TP 1701 1701 192.168.1.3
6 IPSec 500 500 192.168.1.3

Thanks