Sonicwall SSLVPN Outside Public IP White List

Hi all,

I am setting up and testing Sonicwall SSLVPN access for client of mine. A question they are asking is about locking down access for the SSLVPN to be allowed for only certain outside Public IPs outside of their network.

By default, the SSLVPN is open to the whole internet for someone to go to access. My question is, say an outside User's public IP is 1.2.3.4 and they want to SSLVPN into my client's IP of 5.6.7.8. Could I create a firewall rule that would allow only 1.2.3.4 access into 5.6.7.8? I am guessing this might be WAN to SSLVPN rule zone if it was created.