Topic: How to Deploy Agent in external network

hi,i am a newer with Fusioninventory,in our office network,we can catch all the computer info
but as some reason,sales are out of office,with external network,how should i depoly it?i have try to map the public ip to our glpi system,for example,,and also add the external dns record to, i can open the web outside,but cannot catch the computer info which sals used .can you help me?thanks.