I can defend a 6 pool when I know it's coming.
On bigger maps, if I scout him first and see early pool, I wall up and canon np.
If I scout him second I have less chance of holding it.
If I scout him last I die.
I also have a similar problem defending canon rush when I don't scout it until 2:40 because of unlucky scout.
Is there any ways other than what I've come up with below that better players might suggest.
10 gating against Zerg every game to deny possibility of 6/7 pool
sending out a probe straight away, or a 2nd slightly later to scout.