BIG-IP methods to Fix the “421 Misdirected Request” Error
For those of us that are using the BIG-IP as a reverse proxy to front our internal websites to the world, the recent update to Apache has slapped a big "misdirected request" error across our shop windows. The fix is that apache is looking for the SNI headers (that's different from the HTTP headers I originally was working with). The solution to this, for us anyway, was published ages ago in the thread: Serverside SNI injection iRule | DevCentral Drop that in your iRule and the world starts working again. Peace, Love and chocolate biscuits all round.