MOTHER F'ER...
Hidden deep in settings the Linksys router has something called "AP Isolation" that is defaulted to ON.
This is the description of the setting:
Creates a separate virtual network for your wireless network. When this feature is enabled, each of your wireless client will be in its own virtual network and will not be able to communicate with each other. You may want to utilize this feature if you have many guests that frequent your wireless network.
I turn that off and I can SSH just fine. UGH. This has been so f'n painful LOL.