Hello,
Suppose fa0/1 is connected to ADSL and fa0/0 is connected to server and clients
Int fa0/1
ip address 196.155.100.134 255.255.255.252
ip nat outside
int fa0/0
ip address 192.168.1.1 255.255.255.0
IP nat inside
ip route 0.0.0.0 0.0.0.0 196.155.100.133
(suppose your server IP address is 192.168.1.2 with the gateway of 192.168.1.1 so as other clients)
access-list 50 permit 192.168.1.0 0.0.0.255(for clients)
ip nat inside source list 50 interface fa0/1 overload(for clients)
ip nat inside source static tcp 192.168.1.2 7066 196.155.100.134 80 ( for server)
Server will be accessible from outside with IP 196.155.100.134 and port 80 and clients will have Internet as well.
Hope it helps,
Masoud
