Windows 2003 standard Edition Routing & Remote Access

I already have the routing & remote access setup awhile ago.  However, I did not use it for while.  Now since we changed our ISP we have a new external IPs so, I would like to use it again.  

My questions are as follows:

Does the new external IPs have to be entered anywhere in the configuration?
How I can know if the Routing & remote access configuration is correct?
We have a new firewall, should certain ports be opened?
We have DC and other servers members, How can I get to a specific server? However, all the servers have assigned internal IPs?
What I have to do on the client side?

Your help & recommendations are appreciated

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Sam PanwarSr. Server AdministratorCommented:

YEs you have to change something

1.first change the external ip seeting which you have to assign on the NIC
2.If you want to test your network then test through the follwoing command
Go to command prompt and
.1. ping

If it time out means your traffic not router yet
2. tracert

This show the when you disconnect

You have to also check the window firewall and stop it

Configuration check again

1.      Configuration IP your both Ethernet card .One for LAN second for connection.
2.      Remote And routing Access.
3.      Select computer Name right click >configure routing and remote access
4.      Select NAT > select both  interface and next
5.      After configure  In left MMC Select computer Name > than IP routing > Than NAT/Basic firewall
6.      In right panel > Select your LAN Ethernet interface >right click >Properties >than select private
7.      Also select Your internet connection >right click properties> than select public >and also select enable NAT in this interface.

Its nice window intrnet sharing service on network mostly use for routing ip and vpn

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Windows Server 2003

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