Accessing docker container app running on guest KVM from Ubuntu host - docker

Question

My setup is:
Ubuntu server 16.04 running on headless appliance (host)
Windows server 2016 KVM (guest) running on top of the host.
Network type between host and guest is NAT. The whole thing is behind corp. proxy.
The host is getting static IP from the corp gateway.
On the KVM I'm running docker container app that is listening on port 15417 from inside and outside (docker ps: 0.0.0.0:15417 -> 15417/tcp)
The container IP address is 192.168.122.35, while the KVM IP address from NAT is: 192.168.122.82
The app running on the docker container is exposing an API that should be accessed from the linux host on kvm_ip:15417/api
The facts:
Port 15417 is opened on the windows FW for inbound TCP connection.
There is a working ping from the host to kvm IP (192.168.122.82)
The app api can be accessed on 192.168.122.35:15417/api
docker logs, displays logs so the app is up and running.
The problems:
The API cannot be accessed from the KVM on localhost:15417/api or 127.0.0.1:15417/api, the response I get for curl localhost:15417/api is:
Destination host unreachable
The API cannot be accessed from 192.168.122.82:15417/api (KVM_IP) on host, same response on curl 192.168.122.82:15417/api as on the kvm powershell.
No telnet to 192.168.122.82 15417 from host or telnet 127.0.0.1 15417 from guest, while telnet to other ports like RDP (3389) or vnc (5900) is working fine, meaning the ports are all open.
Here's my host 'ifconfig':
br0 Link encap:Ethernet HWaddr 00:90:0b:67:e3:4c
inet addr:172.28.69.86 Bcast:172.28.69.87 Mask:255.255.255.248
inet6 addr: fe80::290:bff:fe67:e34c/64 Scope:Link
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:597 errors:0 dropped:0 overruns:0 frame:0
TX packets:8 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:89816 (89.8 KB) TX bytes:648 (648.0 B)
br-ef89294aca4b Link encap:Ethernet HWaddr 02:42:3d:dc:07:b1
inet addr:172.20.0.1 Bcast:172.20.255.255 Mask:255.255.0.0
inet6 addr: fe80::42:3dff:fedc:7b1/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:80271 errors:0 dropped:0 overruns:0 frame:0
TX packets:51030 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:98712118 (98.7 MB) TX bytes:4318906 (4.3 MB)
docker0 Link encap:Ethernet HWaddr 02:42:ea:f9:4a:a6
inet addr:172.17.0.1 Bcast:172.17.255.255 Mask:255.255.0.0
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
enp2s0 Link encap:Ethernet HWaddr 00:90:0b:67:e3:4b
inet addr:172.28.69.84 Bcast:172.28.69.255
Mask:255.255.255.248
inet6 addr: fe80::290:bff:fe67:e34b/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:43437560 errors:0 dropped:0 overruns:0 frame:0
TX packets:28285024 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:50031414909 (50.0 GB) TX bytes:5610346118 (5.6 GB)
Memory:df800000-df8fffff
enp3s0 Link encap:Ethernet HWaddr 00:90:0b:67:e3:4c
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
Memory:dfe00000-dfe7ffff
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:65536 Metric:1
RX packets:2528921 errors:0 dropped:0 overruns:0 frame:0
TX packets:2528921 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1
RX bytes:3180228446 (3.1 GB) TX bytes:3180228446 (3.1 GB)
veth38444b2 Link encap:Ethernet HWaddr b2:43:0f:a2:0e:34
inet6 addr: fe80::b043:fff:fea2:e34/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:24 errors:0 dropped:0 overruns:0 frame:0
TX packets:12 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:1728 (1.7 KB) TX bytes:816 (816.0 B)
veth55c3534 Link encap:Ethernet HWaddr 52:e3:a5:c0:54:84
inet6 addr: fe80::50e3:a5ff:fec0:5484/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:4329603 errors:0 dropped:0 overruns:0 frame:0
TX packets:4447953 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:1018418030 (1.0 GB) TX bytes:1107337021 (1.1 GB)
vetha9c713b Link encap:Ethernet HWaddr 02:96:67:47:1c:72
inet6 addr: fe80::96:67ff:fe47:1c72/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:175785 errors:0 dropped:0 overruns:0 frame:0
TX packets:124544 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:45484242 (45.4 MB) TX bytes:22613601 (22.6 MB)
vethcfde2a8 Link encap:Ethernet HWaddr ca:ab:04:da:b6:98
inet6 addr: fe80::c8ab:4ff:feda:b698/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:990878 errors:0 dropped:0 overruns:0 frame:0
TX packets:1367424 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:212266708 (212.2 MB) TX bytes:287696403 (287.6 MB)
vethd045150 Link encap:Ethernet HWaddr 42:b0:0f:df:b3:ec
inet6 addr: fe80::40b0:fff:fedf:b3ec/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:431061 errors:0 dropped:0 overruns:0 frame:0
TX packets:423829 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:102897883 (102.8 MB) TX bytes:91172674 (91.1 MB)
vethe3e3d6f Link encap:Ethernet HWaddr 76:21:a7:44:81:7d
inet6 addr: fe80::7421:a7ff:fe44:817d/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:1598 errors:0 dropped:0 overruns:0 frame:0
TX packets:1924 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:597484 (597.4 KB) TX bytes:350579 (350.5 KB)
vethf34ccaa Link encap:Ethernet HWaddr 76:a9:29:e3:b5:2c
inet6 addr: fe80::74a9:29ff:fee3:b52c/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:2674 errors:0 dropped:0 overruns:0 frame:0
TX packets:3783 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:4805257 (4.8 MB) TX bytes:689076 (689.0 KB)
virbr0 Link encap:Ethernet HWaddr 52:54:00:17:94:ca
inet addr:192.168.122.1 Bcast:192.168.122.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:23845306 errors:0 dropped:0 overruns:0 frame:0
TX packets:31454109 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:1454280991 (1.4 GB) TX bytes:48875445867 (48.8 GB)
vnet0 Link encap:Ethernet HWaddr fe:54:00:fc:b7:f1
inet6 addr: fe80::fc54:ff:fefc:b7f1/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:4512098 errors:0 dropped:0 overruns:0 frame:0
TX packets:4084521 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:580069804 (580.0 MB) TX bytes:2979706156 (2.9 GB)
And my KVM (guest) networking default config:
<network>
<name>default</name>
<uuid>9f80b5ad-b4fa-4c7e-a559-d27c23328347</uuid>
<forward mode='nat'/>
<bridge name='virbr0' stp='on' delay='0'/>
<mac address='52:54:00:17:94:ca'/>
<ip address='192.168.122.1' netmask='255.255.255.0'>
<dhcp>
<range start='192.168.122.2' end='192.168.122.254'/>
</dhcp>
</ip>
</network>
And finally the KVM network interface configuration is:
<interface type='network'>
<mac address='52:54:00:fc:b7:f1'/>
<source network='default' bridge='virbr0'/>
<target dev='vnet0'/>
<model type='rtl8139'/>
<alias name='net0'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
</interface>
I struggling while trying to find out what is interrupting ,me from accessing the app on KVM from the host.