if i'm right.. once u tagged vlan500 on ur wan interface.. u'll need to add that vlan interface to ur list of available interfaces.. then only use that new interface to create a pppoe connection..

guys , the guy just finish install unifi .

so far so good .

btw i got a question . how can i set up the connectiong using ethernet cable ?

my cpu dont have wifi adapter only got port .

that guy only configer for wifi .

anyone can help me ?

What calvin suggested should work. It's pretty easy to connect pfsense to the BTU without having a bridge in between. During the initial boot you'll be asked to define the WAN/LAN interfaces and VLANs.. so you just setup a VLAN interface and you'll still have your physical interface along with a brand new VLAN interface. Set the VLAN as the WAN interface and you're good to go. With pfsense it's also possible to use a system with only 1 physical NIC as a router (provided you wire it into a basic switch) as you'll be able to push tagged and untagged traffic over the same wire.