I have an old NetScreen 5GT (201) model.
If it does, how do I set it up? could anybody point me to a manual?
if it doesn't, what product do I need to support this functionality?
The NS 5GT is an older firewall. It is a completely different product than the SSL-VPN solution discussed in this forum. If you are looking for links on how to set it up as a firewall then the following will help you:
http://www.juniper.net/techpubs/hardware/apps_sys.html#5series
If you want to know how to set it up as an SSL-VPN box you are out of luck
The SSL-VPN product line is also known as the "secure access" or "SA" series. The models range from the SA700 (baby, baby box) up to the SA6500 (gigantor box).
I know that there are a couple of limitations on the SA700 the other boxes all pretty much have the same basic features for application access and differ based on user count and some of their high availability and other sharing features.
If you look at eBay for a solution please be aware of the fact that without a feature license these boxes are basically useless.
From the user count - yes a SA700 is fine. It is the functionality that you should review. The SA700 provides "Network Connect" with the base license. This is SSL-VPN access. If that is all you need - then the box is perfect, especially @ that user count level.
You can add some other more granular access through a license for what is called "core" access which is where you can limit users to browser page access only. A third level of access called "SAM" is not available at all on the SA700.
Hope that helps!