Is NAT or PAT (outside translation) needed?

[seanscotland]

Our office currently has 3 gateway routers which connects to a firewall which is acting as a passthrough device (static routing) to a Windows 2003 server which is acting as a router at the moment. (Very messy i know).  Ive only just joined the company and ive been tasked to deal with it. 

I plan to move the windows server on to the switch and have a small Cisco router connected to the switch and on to the firewall which connects to the 3 gateway routers. 

All routers are RIPv2 enabled. However my question really is , if I have connectivity to each of the gateway routers ( I tested it in Packet Tracer), do I also need to set up NAT or PAT in order for internet connectivity to be accessible from the LAN?

[SANTHOSHKUMAR SARAVANAN]

Hi,

 Help me with your network diagram , 

1) when you said 3 gateway router , all are connected to three service provider ??

2)presently how is your windows server is connected ?? , 

3) Share me show ip route from your routers .

4) PAT is advised solution for internet access , when you have any web/mail/pop3 server then there is necessitate for static NAT

HTH

Sandy