SOLVED How to enter at site without WWW

[John Cole]

Hello all.

I have a problem, i have installed NodeBB and can access forum by www.example.com but i cant access this by example.com (without WWW)

What i need to do?

At config.json (nodebb) i entered URL - http://mydomain.com
Server name from nginx config is mydomain.com

I dont entered WWW at all, but forum working ONLY at WWW.
How i can to do access from WWW and WITHOUT it ?

[PitaJ]

Your DNS records aren't set up correctly.

[John Cole]

@pitaj thx for answer but problem was at my cache.
I cleaned cache and cookies and entered at site.

Mark this as SOLVED plz