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Chapter 3 IP Firewall Service 53
• Remote Desktop
• NFS
• NetInfo
UDP ports above 1023 are allocated dynamically by certain services, so their exact port
numbers may not be determined in advance.
Addresses can be listed as individual addresses (192.168.2.2) or IP address and CIDR
netmask (192.168.2.0/24).
To easily configure UDP access for these ports, see “Opening the Firewall for Standard
Services” on page 49. If you need more advanced firewall settings for these basic UDP
services, use the following instructions to create them.
To create an IP filter for UDP ports:
1 In Server Admin, choose Firewall from the Computers & Services list.
2 Click Settings.
3 Select the Advanced tab.
4 Click the New button.
Alternatively, you can select a rule similar to the one you want to create, and click
Duplicate then Edit.
5 Select whether this filter will allow or deny access in the Action pop-up menu.
6 Choose UDP from the Protocol pop-up menu.
7 Choose a UDP service from the pop-up menu.
If you want to select a nonstandard service port, choose Other.
8 If desired, choose to log packets that match the filter.
9 Enter the Source IP address range you want to filter.
If you want it to apply to any address, choose Any from the pop-up menu.
If you have selected a nonstandard service port, enter the source port number.
10 Enter the Destination IP address range you want to filter.
If you want it to apply to any address, choose Any from the pop-up menu.
If you have selected a nonstandard service port, enter the source port number.
11 Choose which network interface this filter applies to.
12 Click OK.
13 Click Save to apply the filter immediately.
LL2351.Book Page 53 Monday, September 8, 2003 2:47 PM