You may want to look at the Juniper Secure Access (SA) appliance for this. The Junos Pulse client is also supported in the SA and is specific to a few OS platforms, however there are several connection options within the SA solution that support different versions of Linux, Unix, Mac OS X and other mobile OS'. The Network Connect client built into SA supports your requirements to connect with full network access from several *nix platforms. Your questions regarding other options, depending on your security and other requirements there are a number of remote access solutions available anywhere from simple SSH tunneling to OpenVPN to the Juniper Secure Access it's hard to say which would be right for you. If your users require a refined and fully supported solution the SA is a good product, it may be worth trying to get a demo.
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I have several web resources configured on my SA-2500 running 7.1r1.1 that work without any issues with the exception of the Solarwinds Orion web page. The Solarwinds page seems to work fine the first time you launch it, however on a second or subsequent visit the page just does not come up and the session seems to hang. When I clear my browser cache it seems to work again. I have attempted every option on the Caching Policy including no-cache, no-store, smart , unchanged, etc... and still I have the same result.
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