A few things we know..


1. When you go to whoisredjohn.com it says 502 or 504 Bad Gateway
2. Red John is "Bad"
3. Gateway backwards is "ya we tag"
4.  Ya "we" meaning him and his alias are "tag" Tagliaferro???
5. 504-502=2 so there might be 2 people not on the list coming in next episode and one of them might be Red John...

IDK but it looks like we are getting close.