Backing up a DB on remote server

I need to backup a postgres DB which is located on a remote server. This server also hosts a lot of other stuff, and that's why I don't have a general access to the server itself. Therefore I believe that I can not use

to access the remote server and run

from there. (Please correct me if I am wrong -regarding

) The only thing I can do is write and read the DB via a DB connection (which is allowed through the firewall.) What is the best approach of backing up such DB? I tried

, but I don't think it'll work under such conditions.