If you want to avoid having a single gateway server - thus risking a single point of failure -,
you can activate the gateway portal and load balancing on a second server of your load balanced farm - to provide a failover to your farm -.
Activating a second gateway portal web feature :
Enabling load balancing on your second gateway portal server :
All you have to do is replicate your load balancing configuration on your second server.
Once it's done, you may either provide:
- the alternate URL to your users,
- and/or generate a new connection client that points to the new gateway.