You can find the Alias Settings at Firewall → Aliases.
An Alias can be of one of the following types:
- Hosts (Single IPs)
- Hosts (Network Range)
- Mac Addresses
You can have Aliases in Aliases but they have to be from the same type. Adding a Mac Address Alias to a Port Alias does not work. You are also not allowed to create cyclic structures like createing 2 Aliases and add each of them to the other Alias. This structure creates a loop and is not valid.
For Hosts you can also use hostnames instead of IP Addresses. Be aware though that it is up to the service you use the Alias in to resolve that hostname.
Aliases can be used in different places like firewall rules.
Aliases for Interface IPs, Networks and Virtual IPs are automatically generated.
12.2.1. Hosts (Single IP)¶
You can enter Single IPs or other Aliases with Single IPs. They can be IPv4 or IPv6.
188.8.131.52. Builtin Hosts¶
12.2.2. Hosts (Network Range)¶
You can enter Network Ranges or other Aliases with Network Ranges. They can be IPv4 or IPv6.
184.108.40.206. Builtin Network Ranges¶
You can enter Ports or other Aliases with Ports. You can also add built in ports.
220.127.116.11. Builtin Ports¶
12.2.4. Mac Addresses¶
You can also create Mac Address Aliases. They are only used for source Mac Addresses in Firewall Rules. Be careful to use those as the source Mac Address is changed by L3 Routers.