NaT bypass?

Yes.

I recently setup IPSec between two Mikrotik Routers and Network A is able to access/ping to NetworkB but NetworkB can not access NetworkA. Where is the problem? NetworkA /ip ipsec export # feb/24/2015 09:33:14 by RouterOS 6.15 # software id = BWNM-9D3P # /ip ipsec proposal set [ find default=yes ] a...