i have a cable access with a static ip,can i install dhcp and dns,will that cause me any problem to my isp, or my internet connection

you can install dns and dhcp on it, you have to configure the forward lookup zone as a primary and the reverse as a secondary, with your domain name etc in the correct fields. dhcp is for your network, whatever you call it, and it is for dynamically assigning ip;s to computers in your domain, so you just have to set that up for static or dynamic, and set up the refresh rates for ips in your domain. for static, ifyou only have a few ip's. a server address has to be static, so make sure your isp is cool w/ that, they might have dhcp as well, and that could cause you some problems. you might have to set your server up as a router as well to do this. and use dhcp from your root down the line.

Scot...why do you think you have to configure the forward zone as primary and the reverse as secondary? It's my understanding you want both as primary...a secondary zone being one that keeps a copy of the primary zone (usually on another server in the same domain). Those are two separate entities...your in-addr.arpa zone (reverse lookup) is it's own object...not a copy of your forward lookup zone. You should have two NIC's in the server...one for the ISP, one for the LAN. All DHCP assignment should be on the LAN side. Your ISP will assign the IP addressing for the External NIC, so leave it set to DHCP and that's all you need to do to it. I have my 2000 Server setup to run RRAS/NAT for my LAN so all LAN clients can access the internet via the one server/router. My setup is as I have already described above. DNS is also set to forward to my ISP's DNS servers (they have two). I set this on the property sheet for the DNS server (Administrative tools >> DNS then right click on the server and choose properties) on the forwarding tab. Forwarding allows DNS to forward requests outside your local DNS zone (ie: a client requests a web page on the internet....this isn't local to your network so the request is forwarded to the DNS server on the internet which handles the query and returns the response to your DNS server which in turn returns it to the client)