Can’t figure out how to set Subnet Mask

[marten2442]

I plugged my wan connection into my box, and I couldn't get a connection to the internet so I contact my ISP and was told this.

You need to set the router's "Internet connection type" to "static IP", and apply the IP address information listed below. Let us know if you need any further assistance setting up the router.

IP- xx.xx.xxx.170
Subnet Mask- 255.255.255.240
Gateway- xx.xx.xxx.161
DNS 1- 10.1.1.3
DNS 2- 10.1.1.6

I'm not quite sure where the gateway and subnet mask options are but I've set the ipv4 address to static in my Interfaces > Wan

[Patrick M. Hausen]

Subnet masks are an outdated format - today people use prefix length (CIDR) notation instead.

255.255.255.240 is 8 + 8 + 8 + 4 consecutive "1" bits, making 28 total. So you set your address to xx.xx.xxx.170/28.

The gateway is created under System > Gateways in the UI.

[chemlud]

"Outdated" is a strong word, as you define an Interface in opnsense with e.g. /28, but on the ISC DHCPv4 config page you see 255.255.255.192 as "Subnet mask". Just as one example.

So it's quite handy to have a conversion table from one notation to the other at hand

https://en.wikipedia.org/wiki/Subnet_mask

;-)

[musketball]

https://dnsmadeeasy.com/support/subnet