With 4.86 going public a few hours ago, yes, you can spoof or use a proxy to go online. I use SKFU's proxy to take my 4.84 PS3 (with HEN) online. : r/ps3homebrew
PS3HEN Archives - Wololo.net
PS3 System Software 4.83 Update Live, Don't Update Your Firmware! | PSXHAX - PSXHACKS