Grant Access by IP Address, Subnet, or Domain

If you have a small number of clients who use newsgroups, you can create an exclusive group of computers that are allowed to access the server. Only these computers can access the NNTP virtual server. Computers that can access the server can be identified by IP address, subnet mask, or domain name.

Warning   Identify a permitted computer by IP address only if you assign IP addresses statically. If a Dynamic Host Configuration Protocol (DHCP) server assigns temporary IP addresses to computers, you cannot ensure a computer will always have the same IP address.

To grant access by IP address, subnet, or domain:

1. Start System Manager
   On the Start menu, point to Programs, point to Microsoft Exchange, and then click System Manager.
2. Navigate to NNTP.

   Servers

   1. Server
   2. Protocols
   3. NNTP
3. In the console tree, right-click a virtual server, and then click Properties.
4. On the Access tab, click Connection.
5. In the Connection window, click Only the list below, and then click Add.
6. In the Computer window, select one of the following options:
   • IP address. Type the static address of a single computer; for example, 192.168.114.201.
   • 
     
     

     Tip   If you know only the name of the computer, click DNS Lookup. Type the name of the computer, and then click OK. If the IP address is resolved, it appears automatically in IP address.

   • Group of Computers. Type the subnet address and mask; for example, a subnet address of 172.17.131.0 and a subnet mask of 255.255.250.0.
   • Domain. Type the complete domain name; for example, nwtraders.microsoft.com.

Note   By default, NNTP virtual servers grant all computers access to Exchange resources such as public folders and mailboxes. If you create groups of permitted users for one virtual server, the list applies to that virtual server only. To limit access to other virtual servers, you must add groups of computers to all virtual servers.