Hi all..Our customer is using IPO SE R9.0. The customer wouldn't like to use a Native IP Office SIP remote worker nor SIP remote worker with Avaya SBCE type of set up when using one-x mobile thru internet.. They would want to use their own VPN connection.. The customer is using Fortinet as their VPN server. What we did was we downloaded an application for smartphones which is FortiClient, configured the settings so we can connect to their VPN thru internet. From their, I can ping the IPO server but I can't register my samsung duos android version 4.0.4. It's working properly when using wifi but not with the internet. Port forwarding rule on the Fortinet has not been done yet. Do you think port forwarding could be the cause..??We haven't done port forwarding part yet due the Fortinet is being managed by other vendor and we're seeking their assistance. Has anyone tried using one-x mobile via VPN's customer set up..???Seeking for your kind response..Thank you..