How to login to ZBT routers

Guys and Gals I want to be able to login to my ZBT WD323 ROUTER in order to add a watchdog script , I have tried using Filezilla but the connection was refused when I use the admin login details

Am I doing something wrong or do I need another client to access my routers software ?

for ssh use root, not admin
That is not specific to ZBT brand.

Hi I did use root and the admin login password and I get this error in Filezilla
Connection attempt failed with "ECONNREFUSED - Connection refused by server".

start from vanilla ssh
If you're a Windows 10 user then you probably have ssh client preinstalled, otherwise you can install any ssh client like Putty.