I have my clients behind a pfsense firewall. There are times, for testing purposes, that I would want to connect someone on the "red" side of the firewall (I.e. before it).
I have an HP Procurve 1800-24G with VLAN support.
How secure are VLANs? Is this OK practise to do this (split half a switch "outside" and half a switch "inside")?