We are implementing a Linux based Firewall System with IPCHAINS.
As per our current Intenet setup,all the external IP’s(Given by the ISP) are using the router as Default Gateway.
But as per our design except the external IP in the Firewall,all other IP’s should use the Firewall System as the gateway.
We are able to run the Firewall Script(ie, rc.firewall in /etc/rc.d).
We have two NIC’s in the firwall system.
The packets are not forwarded to internet,after making the firewall system as the Default Gateway.
We are running a DNS service(BIND) in the firewall system.The client are getting the domain the name resolved but they are not able to browse the Net.
(Packet Forwarding is enabled as IP_V4=yes)
We already enabled the forward IPCHAINS also.
Do i have to add any other configuration, to make this system as default gateway with firewall service??
Do i have to run a squid in the firewall server to increase the speed of the Net.
Thanks in advance..