Does Verizon FIOS Block Port 22?

I'm on FIOS with a Quantum Gateway modem, and can ssh to my Linux box with:

• putty/ssh from other computers on my LAN
• my phone, when connected to my wifi

I can NOT ssh into my Linux box from:

• putty from my Windows box at work
• my phone, when connected to the 4G network.

I redid the test changing the firewall setting from "typical security (medium)"  to "minimum security (low)",  and I still couldn't ssh to my Linux box from outside my LAN (note I didn't reboot the modem after changing the security setting, but I don't think this is necessary.)

So I'm thinking one of the following is true:

1. Verizon blocks port 22.
   
   
2. I need a port forwarding rule to forward port 22 to my Linux box.

 Does Verizon block the ssh port?