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Cisco SSL "Clientless" VPN

Posted on 2007-12-05
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Last Modified: 2010-04-21
Hi,

Interested in using SSL VPN with the ASA box, but have some questions I am hoping someone can verify:
Apparently there are 3 ways it can be utilised:
1. Clientless SSL VPN  - A remote client needs only an SSL-enabled web browser
2. Thin-Client SSL VPN (Port Forwarding)  - A remote client must download a small Java-based applet
3. SSL VPN Client (SVC-Tunnel Mode) - The SSL VPN Client downloads a small client to the remote workstation

So just that I am on the right track here, if I had clients and wanted absolutely nothing installed\downloaded on them I could go with 1. It may seem an obvious question, but I have found a lot of advertised "clientless" applications actually try to install certain components.

Also, a secondary question, certain web applications do use ActiveX\Java etc..so if I used option 1 and tried to access that required active x control, would the browser just try and attempt to download the control as per normal.
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Question by:58872
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batry_boy earned 2000 total points
ID: 20411416
>>So just that I am on the right track here, if I had clients and wanted absolutely nothing installed\downloaded on them I could go with 1.

That is correct.  It only uses HTTPS through your browser and doesn't require any plugins or applets to work.  I've had to use this method of VPN in situations where users didn't "own" the machines they were using and were restricted from installing absolutely ANY software on it.  However, you will find that some applications (some high-end databases with web front ends, etc.) just don't work right using this method.  It becomes an application issue at that point, but most apps that utilize a web interface work quite well.

>>Also, a secondary question, certain web applications do use ActiveX\Java etc..so if I used option 1 and tried to access that required active x control, would the browser just try and attempt to download the control as per normal.

Yes it should.  It's important to note that when using option 1, only traffic from that single browser session is tunneled to the ASA.  If you opened another browser session, you would be going straight out to the Internet without being tunneled to the ASA.  So, having said that, as long as the browser is told where to find the applet or control then it should be able to download and install it just fine.  But it sounds like you don't want to or can't install any software on the machine to begin with, so I'm not sure if this fits your needs.
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by:58872
ID: 31412804
Brilliant. Thanks.
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