Single port entry and exit to internet

Dell 5448. 

•       Hello if anyone can help. I have pfsense installed as my firewall on a Dell in an HP rack. The Dell 5448 is also in the rack.
• Now can you help;
  •    1. The 5448 has at least 6 VLANs configured. 
  • 2. the network has all the VLANs going in and out on different ports on the switch to the different ports on the pfense firewall.  Now what I need to do is setup the 5448 so traffic coming from devices attached to the switch exits out of one port to the firewall and out to the internet. if I can do that then I can set up a mirrored port to that port and monitor traffic with either surricata, security onion etc... 
  • 3. The switch does not allow more than one mirroring port. Can I setup more than one port for mirroring

Thanks your help is appreciated