Steamcmd: How to make it public server?

Hi, I just finished installing steamcmd for css. I can't get a public server working, but it works for lan. I tried sv_lan 0 and it still wouldn't work. I have both network: IP and Public IP. Steam cannot find the server using the Public IP, but it works with network IP. How do I get my server working so others can join?

I use windows btw