Thanks.
I was thinking it must be related to the way the bridge was set up but I don't see anything out of place:
root@Tower:~# ifconfig
br0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.1.2 netmask 255.255.255.0 broadcast 0.0.0.0
ether xxxxxxxxxx txqueuelen 1000 (Ethernet)
RX packets 4614 bytes 1160833 (1.1 MiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 2766 bytes 648307 (633.1 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
docker0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
inet 172.17.0.1 netmask 255.255.0.0 broadcast 0.0.0.0
ether xxxxxxxxxx txqueuelen 0 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
eth0: flags=4419<UP,BROADCAST,RUNNING,PROMISC,MULTICAST> mtu 1500
ether xxxxxxxxxx txqueuelen 1000 (Ethernet)
RX packets 4615 bytes 1235407 (1.1 MiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 2741 bytes 638227 (623.2 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
inet 127.0.0.1 netmask 255.255.255.255
loop txqueuelen 1 (Local Loopback)
RX packets 404 bytes 38987 (38.0 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 404 bytes 38987 (38.0 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
root@Tower:~#