Unable to ping from host to guest in KVM

I have a Windows guest setup using KVM on an Ubuntu host. The problem is that I am able to connect to the internet and ping the host from the guest, but can't seem to ping the guest from the host or any other machine from my network. I have set up a bridge 'br1' to use my ethernet interface 'enp0s31f6'. Here is my /etc/network/interfaces config.

auto br1iface br1 inet dhcp bridge_ports enp0s31f6 bridge_stp on bridge_fd 0.0

Below is the output of ifconfig

br1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500    inet 192.168.1.4  netmask 255.255.255.0  broadcast 192.168.1.255    inet6 fe80::127b:44ff:fe15:f37d  prefixlen 64  scopeid 0x20<link>    ether 10:7b:44:15:f3:7d  txqueuelen 1000  (Ethernet)    RX packets 739277  bytes 1058869416 (1.0 GB)    RX errors 0  dropped 0  overruns 0  frame 0    TX packets 693983  bytes 54242599 (54.2 MB)    TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0enp0s31f6: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500    ether 10:7b:44:15:f3:7d  txqueuelen 1000  (Ethernet)    RX packets 22782265  bytes 33307625462 (33.3 GB)    RX errors 0  dropped 0  overruns 0  frame 0    TX packets 20737125  bytes 10650592233 (10.6 GB)    TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0    device interrupt 16  memory 0xdf200000-df220000  lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536    inet 127.0.0.1  netmask 255.0.0.0    inet6 ::1  prefixlen 128  scopeid 0x10<host>    loop  txqueuelen 1000  (Local Loopback)    RX packets 209286  bytes 376780337 (376.7 MB)    RX errors 0  dropped 0  overruns 0  frame 0    TX packets 209286  bytes 376780337 (376.7 MB)    TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0vnet0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500    inet6 fe80::fc54:ff:fe99:3ed6  prefixlen 64  scopeid 0x20<link>    ether fe:54:00:99:3e:d6  txqueuelen 1000  (Ethernet)    RX packets 583200  bytes 40164778 (40.1 MB)    RX errors 0  dropped 0  overruns 0  frame 0    TX packets 784791  bytes 1164555387 (1.1 GB)    TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

vnet0 is setup by KVM on running the guest. The guest is being detected by the router under a separate device and the DHCP on the router does allocate it an IP.

IP Address: 192.168.1.35Subnet Mask: 255.255.255.0Gateway: 192.168.1.1DNS: 192.168.1.1

I have gone through dozens of solutions from google but nothing seems to work. Any help would really be appreciated.