The solutions to many security and firewall issues aren't always obvious. This chapter provides cookbook-like examples.
When a firewall object is created from a template, its IP addresses might not match the addresses used in your network. This section demonstrates how these addresses can be changed.
We start with a firewall object created in with a three-interface template and the IP address used for the internal network is 192.168.1.0/255.255.255.0. Suppose we need to change it to 172.16.22.0/255.255.255.0. We need to change the IP address of the internal interface of the firewall, as well as the address used in the policy and NAT rules.
To begin, find the IP address of the internal interface of the firewall in the tree and double-click it to open it in the editor.
Edit the IP address (and possibly the netmask if needed), then click "Apply". This changes the IP address of the interface of the firewall.
Now we need to change the IP address used in the rules. To do this, we create a new network object with the correct address and replace the object net-192.168.1.0 in all rules with this new network object.
Usemenu to create the network object.
A new network object is created with default name "New Network" and IP address 0.0.0.0.
Edit the object name and address, then click.
Selectto activate the search and replace dialog.
Drag and drop the object "net-192.168.1.0" from a policy rule or from its location in the "Standard" library to the left object field in the search and replace dialog.
Locate the new network object you just created and drag and drop it to the right object field in the search and replace dialog.
Change the scope toand click . If you have many firewalls in the tree and you only want to replace in this one, use the scope instead. A pop-up dialog appears telling you how many replacements have been done.
Note how the search and replace function replaced the object "net-192.168.1.0" with "internal net" in the NAT rules as well.
If the IP address used for the DMZ network in this template does not match your configuration, you can change it using the same procedure.
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