SSH Connect Problem

Hello,

We are using Fortigate 1500d at our company. I am new in IT Department. I have to access a server via SSH from my home. 

I have created a rule that allows all services from WAN to DMZ. I have tried for different server. But I can't. In addition I can not see any log for connection error. In local network I can connect my servers via SSH. Is there any config or command for open SSH port on Fortigate? 

Best regards.