Knockback without going through walls

Probably impossible, but just wondering if you guys have any solution for minimizing knockback not make the player pass through walls. Simple solution I found is making the wall colliders bigger, but what if you want thin walls? You probably have seen this a lot in speed runs games that players is able to somehow glitch their way and walk through walls/locked doors.

 

I can suggest, to look into topics, on how bullets are dealt with. Or other fast moving objects.

 

I looked into that before, but I try again. Raycast might work but i have about 200 characters in one map so probably not.

 

In the inspector of the rigidbody try to change collision detection to continuous

 

Already did tried that. Instead I set boundaries and restrict movement. It works like a charm.

 

I'm looking for a solution for this problem as well.. any chances you can still explain how your solution works?