Svchost Firewall exceptions

I get these events on a regular basis:

Event Type: Failure Audit
Event Source: Security
Event Category: Detailed Tracking
Event ID: 861
Date: 12/4/2005
Time: 2:40:09 PM
User: NT AUTHORITY\NETWORK SERVICE
Computer: WIN2003-HOME
Description:
The Windows Firewall has detected an application listening for incoming
traffic.

Name: -
Path: C:\WINDOWS\system32\svchost.exe
Process identifier: 1416
User account: NETWORK SERVICE
User domain: NT AUTHORITY
Service: Yes
RPC server: No
IP version: IPv4
IP protocol: UDP
Port number: 1861
Allowed: No
User notified: No

Using procexp I can see that DHCP (DHCP Client) and DNS Cache (DNS Client)
are the services registered for that process. It is using UDP ports 1029,
1046, 1563, 1861, and 1394 for all remote addresses. One cannot add
svchost.exe to the firewall exception list. The problem; however, is that
process id has had block audit failures on ports 1163, 1172, 2840 and 2843
that is not showing in the current process. Hence, it would seem that the
UDP ports being used by this process vary over time.

The firewall will not let one add svchost.exe to the exception list. How do
I set up the firewall to not block UDP packets for this process??

Thanks.