Docker containers and KVM VMs on host bridge in a single system causes firewall REJECT

Issue

• When docker is started, KVM VM can not route outside of hypervisor's bridge.
• ssh from outside the host returns No route to host

$ ssh root@192.168.100.221
ssh: connect to host 192.168.100.221 port 22: No route to host

• ping from outside the host is successful

$ ping 192.168.100.221
PING 192.168.100.221 (192.168.100.221) 56(84) bytes of data.
64 bytes from 192.168.100.221: icmp_seq=1 ttl=64 time=0.761 ms
64 bytes from 192.168.100.221: icmp_seq=2 ttl=64 time=0.661 ms
^C
--- 192.168.100.221 ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 1000ms
rtt min/avg/max/mdev = 0.661/0.711/0.761/0.050 ms