A host is a device that connects to the network and that has an Internet address. You add the hosts that you want the firewall to allow or block to restrict incoming and outgoing network activity in the Firewall policy. For example, you may want to always allow traffic to and from the computers in the
yourcompany.com domain, but block IP addresses from known advertisers.
- SelectAdd From Host Groupto add a list of hosts that can be shared across multiple firewall rules and Firewall policies. See:
- SelectAdd Hostto add a host to the selected firewall rule only.
You define either the source host and the destination host relationship, or the remote host and the local host relationship. Either method provides the same functionality.
Specifies the source and the destination address or the host name.
The source and the destination host are defined as follows:
If the client communicates with a Web server and the traffic is inbound, then the source host is the Web server; the destination host is the client. If the traffic is outbound, the source host is the client and the destination host is the Web server.
Specifies the local or the remote address or the host name.
The local and the remote host is defined as follows:
If the client communicates with a Web server, the remote host is the Web server; the local host is the client. The local host is the same, for both inbound traffic and outbound traffic.
The following figure illustrates the source relationship and destination relationship with respect to the direction of traffic.
The following figure illustrates the local host and remote host relationship with respect to the direction of traffic.