4. Initial System Settings

Next we will have a look at the system settings of your OPNSense box and configure it to your local needs ;). 

1. Go to System > Settings > General

2. In here we will choose a hostname and a domain name. You can call your OPNSense router whatever you want but I like to call it CR1 for core router 1 and the domain name I would choose something related to the location your OPNSense router is running. 

3. Set your time zone, language and theme. One of the themes I personally like is the cicada theme, but it is up to you of course. 

4. Then if you have a nice picture of your whole setup then you can also add it here, which then later can be added to your home screen. 

5. Then the DNS information you can leave blank for now

6. Finally, make sure the following are unchecked 

•  Allow DNS server list to be overridden by DHCP/PPP on WAN 
• Do not use the local DNS service as a nameserver for this system 
• Allow default gateway switching 

7. That's it for now, but we will come back to this later ;)