dual NIC setup webmin

I have build a webmin squid server with dual NIC.
eth0 connected to the router and eth1 connected to the switch / server and workstations.
I have set the gateway for eth0.
Netmask is for both

Workstations can ping with eth1 and eth0 but no access to internet or the gateway.
Need some help howto setup the network with Yast or Terminal

Solved changed webmin router settings gateway.