Protection Zone Block

Protection Zone Block is indicated by the protection zone block icon on your character's status bar. As long as you have the protection zone block, you cannot enter a Protection Zone. While the protection zone block icon is display the Logout Block icon is not displayed.

In PvP worlds, depending on the PvP type and the player's PvP settings, when you attack other players or set a field rune (fire field, fire wall, etc.), the icon will appear. Players that are attacked can fight back and then run or kill the attacker and not have the block. You will still receive a Logout Block for attacking another player, though.