Just to be sure you do have different SSL VPN Pool network subnets on both sites do you?
So be sure not both sites are using the "default" 10.242.2.0/24 network. Otherwise the return traffic will never go back.
Also please give us a better layout view of your network. Are sites 1 and 2 both UTM's and do those UTM's connect to each other as a RED client/server pair or is there a standalone RED somewhere in the picture?
Just to be sure you do have different SSL VPN Pool network subnets on both sites do you?
So be sure not both sites are using the "default" 10.242.2.0/24 network. Otherwise the return traffic will never go back.
Also please give us a better layout view of your network. Are sites 1 and 2 both UTM's and do those UTM's connect to each other as a RED client/server pair or is there a standalone RED somewhere in the picture?