Microsoft 2004 User Manual

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Configure DHCP WPAD Support 
The DHCP scope option number 252 can be used to automatically configure Web Proxy and 
Firewall clients. The Web Proxy or Firewall client must be configured as a DHCP client, and 
the logged on user must be a member of the local administrators group or Power users group 
(for Windows 2000). On Windows XP systems, the Network Configuration Operators group 
also has permission to issue DHCP queries (DHCPINFORM messages). 
Note: 
For more information about the limitations of using DHCP for autodiscovery with Internet 
Explorer 6.0, please see KB article Automatic Proxy Discovery in Internet Explorer 
with DHCP Requires Specific Permissions
 at 
http://support.microsoft.com/default.aspx?scid=kb;en-us;312864  
• 
Perform the following steps at the DHCP server to create the custom DHCP option: 
1. Open 
the 
DHCP console from the Administrative Tools menu and right click your server 
name in the left pane of the console. Click the Set Predefined Options command. 
2. In 
the 
Predefined Options and Values dialog box, click Add
 
3. In 
the 
Option Type dialog box, enter the following information: 
Name: wpad 
Data type: String 
Code: 252 
Description: wpad entry 
Click OK
ISA Server 2004 Configuration Guide 41