PIX and DNS without DHCPD

[johndw1963]

This is my first experience with any Cisco product and sofar very frustrating. Trying to add inet access to existing network on Win 2003 server. PIX is addressed directly to ISP fixed IP without a router. Existing server is supplying DHCP so dhcpd is diabled on PIX 506e. On network pc I can ping IP but can not do nslookup or ping a named site. I see where DNS is defined in dhcpd but I am not using that service on the PIX.

How can I define the dns server IPs and get the resolved IP back to client network PC?

All suggestions greatly appreciated.

[ehirsel]

Is the existing server that supplies DHCP services on the same side of the PIX as the DHCP clients? Or do the DHCP requests cross the PIX?

Where is the win2003 server in relation

When you state: "Trying to add inet access to existing network on Win 2003 server"

does that mean that inet access will be done via the server (i.e. Internet connection sharing, proxying, etc.)? Or is the win2003 server used for something else?

[johndw1963]

The server and all workstations are behind the PIX and the server provides dhcp Ids. Server provides database and MS Office files to workstations. PIX is connected (inside) to the network hub and (outside) to Adtran router from SWBell.

LAN users will access Inet through PIX. Server is involved only as DHCP server.

If PIX provides dhcp then DNS address can be specified, but I see no place to supply DNS addresses when server provided dhcp.

[plemieux72]

So if I understand correctly, the internal network does not have a DNS server. Therefore you want to use the swbell DNS server for all the clients right? If the PIX was handing out the IP addresses, you would configure it with:

dhcpd dns x.x.x.x y.y.y.y

Since in your case, the Win 2003 server hands out the IP addresses, you need to configure the scope with a DNS option specifying x.x.x.x and/or y.y.y.y.

This way, all the DHCP requests from workstations will obtain not only an IP address but also the IP address of your ISP's DNS server (x.x.x.x).

Just check the MS documentation on DHCP, you will find all you need to know about configuring options.