Question about firewall and support gems adding damage

I'm wondering if i take the Hourglass support gem, and socket it in Fire Wall, does the 40% more damage effect the ignite damage and the bonus damage to projectiles that pass through the wall? Or does it only directly effect the bonus damage of the fire wall and not the projectile buff?

I'm not super seasoned at the game and tried to test it on mobs but couldn't get conclusive evidence for myself.

thanks!

Only ignite damage of Flame Wall.