Create a Host List

A host list contains a set of IP addresses, DNS names, and/or subnets that traffic class matching rules can reference. Host lists let you specify many IP addresses and/or names in a single traffic class matching rule. The addresses in a host list do not need to be contiguous.

The Host List Editor provides an interface for creating, updating, and deleting host lists.

To create a host list:

1. While creating a class or adding a matching rule, select Host List in either the Inside or Outside column.

2. Click the icon. The Host List Editor window opens. show screen

3. Enter a name in the New host list field.

4. Click add list to generate the new host list.

5. Enter an IP address, subnet, range of IP or subnet addresses, or DNS name in the New hosts field. The host can be specified in any of the following ways:

Type of Host	Example
Host IP address	192.168.1.10
Range of IP addresses Use a dash — with no spaces — between the low and high address in the range.	192.168.1.100-192.168.1.200
Address of the subnet; the CIDR number specifies the number of constant bits in the address range	192.168.10.0/24
Range of subnet addresses; the CIDR number specifies the number of constant bits in the address range Use a dash between the low and high address in the range. Spaces are not allowed before or after the dash or slash characters.	192.168.10.0-192.168.20.0/24
DNS name Note: Do not use domain names if you will be using the host list with the host sidedness feature.	www.yourcompany.com

Note: The host list editor accepts any addresses and/or names that are syntactically correct. It does not validate the existence of the entries.

6. Click add host.

7. Continue adding hosts to complete the list and then click done to return to the Matching Rule or Traffic Class window.

8. To include the selected host list in the matching rule definition, click apply changes.

Note: A single Host List Editor session is limited to the creation of 32 host lists. A message window warns when this limit is reached. To initiate a new session to add more host lists, close the Host List Editor window and the Matching Rule window and then open them both again.