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Multiple SSL Virtual Appliance with a single entry page

New Contributor

Multiple SSL Virtual Appliance with a single entry page

Hi guys,


Hope someone can help me with this one.


We are deploying a X number of SSL Virtual Appliances in strategic places arround the globe. While the SSL gateways will function as local entry points we want to create a single entry page.


User goes to a specific URL and can then choose and login to any regional gateway.


Someone suggested using Round Robbin DNS and creating the same entry page on all the gateways. But that does not seem the correct answer to my problem.


And of course the solution would preferably be something without having to do any major investments. But i'm open for suggestions.


Thank you.



Super Contributor

Re: Multiple SSL Virtual Appliance with a single entry page

We do something like this.  Just like you, we wanted to have a single URL for a global service, and relieve the end user of the need to know the details of our solution, in particular, the URLs of the different SAs.   I'm not entirely happy with our solution, but it does work.


You don't want to do round-robin DNS.  You need to ensure that the resolution of the DNS name of the SA does not change during a user's session.  Some global load-balancers (like F5's GTMs) allow you to do something called Geo-IP, which resolves a name based on the deduced location of the DNS server which queries the GTM to resolve a name.  Something like this could work, but it of course costs money unless your enterprise already runs GTMs (or something like them).


We do something a little different.  We run an external web site which takes information about the end-user from an internal directory and then redirects the user to the URL of the "optimal" SA globally (we have SAs in 9 locations - 2 in the Americas, 2 in Europe, and 5 in ASPAC).  We make decisions based on the location of the user's mail server, which is in the directory.  We assume that the user should connect to the SA "closest" (in network terms) to the user's mailbox.  Alternatively, the user can override this logic and specify the destination to which they want to be redirected.  We actually use SA's for this function, but you don't need to, and I would like to get rid of them in that function.


If I had it to do again, I would do something like this -

  1. Build an internal web site with all the logic.
  2. Use the "authorization only" capability of the SA to give user direct access to the internal web site without authentication.

I could see expanding the logic of this to monitor the loads on our SAs and do some rudimentary load-balancing among destinations, and also implement failover on server outage.



New Contributor

Re: Multiple SSL Virtual Appliance with a single entry page

Hi Kenlars,


Thank you very much for your suggestion. What you propose sounds interesting and I will have someone look into these possibilities. I need to get a few more possibilities to present to the business.


The single entry page was defined as one of the requirements for the solution and seems to be on the top of the list of desired functionalities. Of course this requirement needs to be met without compromising any security putting the system and company at risk.


Please let me know if you know of any other alternative / solution to meet this requirement.


Thank you.