___ # Tags #unifi #unifi-dream-machine-pro #firewall #networking # Helpful Docs - This [Crosstalk Solutions video](https://www.youtube.com/watch?v=UGBobTInIBc&t=87s) was helpful - [UI docs](https://help.ui.com/hc/en-us/articles/115003173168) describing firewall types # Notes - `In`, traffic coming from any LAN (or VLAN) based network coming into the UDM Pro - `Out`, traffic coming from the UDM Pro or internet coming into the LAN (or VLAN) - `Local`, traffic coming to the UDM Pro specifically - When creating inter-vlan traffic you have to create a rule that allows a source to make a connection using LAN_IN and you have to make a rule for the target VLAN to return the connection using `Established`, or `Related` states - This allows you to initiate a connection and allows the connection to be returned from the destination VLAN