-------------------------
                | Server:  192.168.50.172 |
                | Gateway: 192.168.50.254 |
                /-------------------------\
               /                           \
       ----------------                ----------------
      | Firewall 1:    |              | Firewall 2:    |
      | 192.168.50.254 |--> bridge <--| 192.168.50.252 |
      | 10.0.51.254    |--> bridge <--| 10.0.51.252    |
       ----------------                ----------------
                \                            /
                 \--------------------------/
                 | My computer: 10.0.51.198 |
                 | Gateway: 10.0.51.252     |
                  --------------------------