Most of the vertical mounts I’ve seen use a Moxon vise. You can see mine here in my dovetail guide. It’s rather crude but it works. There is another one shown later in the thread that looks more professional. It’s a long read but you can also learn my method for making dovetails if your so inclined.
You can see @gwilki’s setup here and some pretty neat joints too.
EDIT: Here is @LewisB314 's.