The photo of the screen on the NAS suggests that the correctly configured IP address of your NAS is 192.168.1.16 and this is backed up by the screenshot from the router.
DO NOT ENTER EITHER 192.168.1.16 OR 192.168.1.255 AS THE DEFAULT ROUTE IN ITEM 4 THAT NEEDS TO BE THE IP ADDRESS OF THE ROUTER, PROBABLY 192.168.1.1 IN YOUR CASE What happens when you try to go to
https://192.168.1.16/ in your web browser? If it does not work then find out the IP address of your laptop or PC or whatever you're trying to access the FreeNAS from and then type the following at the command prompt on the FreeNAS,
[pre]ping -c 4 IP_ADDRESS_OF_PC[/pre]
Where IP_ADDRESS_OF_PC is the IP address of the device you want to connect to the FreeNAS from. That should give you something like,
[pre]
[root@nas ~]$ ping -c 4 192.168.1.13
PING 192.168.1.13 (192.168.1.13): 56 data bytes
64 bytes from 192.168.1.13: icmp_seq=0 ttl=64 time=6.574 ms
64 bytes from 192.168.1.13: icmp_seq=1 ttl=64 time=0.209 ms
64 bytes from 192.168.1.13: icmp_seq=2 ttl=64 time=0.238 ms
64 bytes from 192.168.1.13: icmp_seq=3 ttl=64 time=0.235 ms
--- 192.168.1.13 ping statistics ---
4 packets transmitted, 4 packets received, 0.0% packet loss
round-trip min/avg/max/stddev = 0.209/1.814/6.574/2.748 ms
[root@nas ~]$
[/pre]
Also try pinging the IP address of your router,
[pre]
ping -c 4 192.168.1.1
[/pre]
Which should give similar results.
It would also be worth trying to ping the FreeNAS from the device you are trying to administer the FreeNAS from. Assuming you are using a Mac then open a Terminal (Finder, Applications, Utilities, Terminal) and type the following at the command prompt,
[pre]
ping -c 4 192.168.1.16
[/pre]
This should give you an output very similar to the one above (but with 192.168.1.16 instead of 192.168.1.13). If you are using a PC then the command is,
[pre]
ping -n 4 192.168.1.16
[/pre]
Kind regards, Alec