I have a container running on my laptop which serves a webinterface to port 80 via NGINX. There is a proxy device attached to it that listens on the ip-addresse of the container (port888) and connects to the 127.0.0.1:80.
I can access this via [IP-addresse]:888 on the browser of my own machine but not from the browser of another host on my local network (a VM running on my localhost which can ping the [IP-ddresse] and also reach the interface of my local router via its IP.
$ ip a show lxdbr0
16: lxdbr0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
link/ether 00:16:3e:f4:e3:8b brd ff:ff:ff:ff:ff:ff
inet 10.155.180.1/24 scope global lxdbr0
valid_lft forever preferred_lft forever
inet6 fe80::216:3eff:fef4:e38b/64 scope link
valid_lft forever preferred_lft forever