Bukkit

What steps will reproduce the problem?
1. firing cannons at faction teritory when players offline
2.Factions v2.7.5
3.spigot 1.8.3

What is the expected output? What do you see instead?

What version of the product are you using?
latest

Do you have an error log of what happened?
no eror log

Please provide any additional information below.

sorry for tiket :( is see u have started working on this issue

@OvidiuPatrat: Go No, problem it was open for a while but I didn't have time start something.

I am not familiar with Factions, but can you set these options for normal explosives? Then it should also be possible with Cannons explosions.

However Spigot 1.8.3 made a new BlockExplodeEvent which is used in Cannons and not all protections plugins support this feature. You can set relayExplosionEvent to emulate the old behaviour.
https://github.com/DerPavlov/Cannons/blob/master/src/main/resources/config.yml