Put the summary of the bug you're having here
What I expected to happen was...allow me into the server
What actually happened was...sent me back to the login site
Steps to Reproduce:
1. opened minecraft
2. changed to 1.7.9
3. went into the server
4.then quitted and sent me to the login site
Older versions of the game are no longer supported. This report may however be a duplicate of MC-38527, in which case your render distance is set too high for older versions of the game.