From UntangleWiki

Do I have to pay for the ability to use Multi-WAN?

No, it's available at no charge. If you want to use WAN Balancer and/or WAN Failover,

I just ran the Setup Wizard and I was not asked any questions about my WAN connections. How do I set up multiple WANs?

Its not part of a basic installation. Here's how to setup Multi-WAN.

Why won't OpenVPN use both of my WAN connections?

The OpenVPN configuration files specify only the WAN address that is listed as your External interface.

Can I use Remote Access Portal on both of my WAN connections?

No. Remote Access Portal will only function on your primary WAN connection.

Can I use PC Remote on both of my WAN connections?

No. PC Remote will only function on your primary WAN connection.

Can I use Remote Administration on both of my WAN connections?

No. Remote Administration will only function on your primary WAN connection.

Do I have to buy another certificate now that I have multiple WAN connections?

Only if the additional external WAN connection(s) would be used for an additional domain name. If you are only using one domain name, your existing certificate is all you need.

Does Untangle multi-WAN support give me a bonded connection?

No. A bonded connection combines the bandwidth of multiple internet connections from a single ISP into a single physical connection, and often requires additional hardware at each end of the connection.

I have 2 IP addresses from my ISP, why can’t I get Multi-WAN to work?

Your ISP may give you two or more IP addresses, but if the addresses share the same physical WAN internet connection, you have just one WAN.

I have 2 WAN connections from 2 different ISP's, but I can’t get Multi-WAN to work.

Check to see if the IP addresses have the same Class C address (same subnet). If so, this will not work. You need to get one ISP to give you a different IP address.

I have installed and configured WAN Balancer and/or WAN Failover and nothing is happening. What should I do?

Check your Multi-WAN setup to make sure that you've set this part up properly.

I have 2 WAN's and I want to put all my FTP traffic on one and all my HTTP traffic on the other. Can I do it?

As a general rule, no. If you can define the external destination of all FTP traffic, you may be able to use Static NAT to accomplish this.