Hello I have following dockerfile on my macOS Sierr High (as example):

FROM richarvey/nginx-php-fpm:1.3.7
EXPOSE 80

And I'm able to build and run it on 192.168.8.101:8082 by

docker build -t myproject
docker run -d -p 192.168.8.101:8082:80 --name myproject myproject

and it works on http://192.168.8.101:8082 my local computer and devices (iPhone) connected to the same wifi network (I also have no problem to run container on localhost).

However when I try tu run this container on other IP like for example 192.168.8.102:8082 I get following error:

Mac-mini-Kamil:myproject Kamil$ docker run -d -p 192.168.8.102:8082:80 --name myproject myproject 
f939d38243f420f812c859f5fe275faf49dc6e123d807583ec240fbdf0619a17 
docker: Error response from daemon: driver failed programming external connectivity on endpoint myproject (0b546e63887e3ddeb4d2b21a8d6d15a94e33f1ff67c2765174a808bf6b13e120): Error starting userland proxy: listen tcp 192.168.8.102:8082: bind: cannot assign requested address.

I try also other addresses like 172.17.1.2 but with no success and I don't have idea why. Do someone cane give me advice (and/or instruction about what more information I should provide to this question to solve it) ? I would like to know: why I cannot use other IPs and what I can do to use other IPs?

UPDATE - additional informations:

After execute ifconfig I selected two interesting results :

en1: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
    ether a8:8e:24:a3:d3:91 
    inet6 fe80::18fe:1146:6389:b630%en1 prefixlen 64 secured scopeid 0xa 
    inet 192.168.8.101 netmask 0xffffff00 broadcast 192.168.8.255
    nd6 options=201<PERFORMNUD,DAD>
    media: autoselect
    status: active

bridge0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
    options=63<RXCSUM,TXCSUM,TSO4,TSO6>
    ether 32:00:11:fc:70:40 
    Configuration:
        id 0:0:0:0:0:0 priority 0 hellotime 0 fwddelay 0
        maxage 0 holdcnt 0 proto stp maxaddr 100 timeout 1200
        root id 0:0:0:0:0:0 priority 0 ifcost 0 port 0
        ipfilter disabled flags 0x2
    member: en2 flags=3<LEARNING,DISCOVER>
            ifmaxaddr 0 port 9 priority 0 path cost 0
    nd6 options=201<PERFORMNUD,DAD>
    media: <unknown type>
    status: inactive

The output of ifconfig (linux, OSX) or ipconfig (Windows) will probably tell you that your IP4 is 192.168.8.101.

That's reason why 192.168.8.101:8082:80 works. Docker can access the endpoint and can map port 80 of its container on port 8082 of 192.169.8.101.

When you use another IP this error will pop up:

Error response from daemon: driver failed programming external connectivity on endpoint

This means your Docker daemon can not access the endpoint 192.168.8.102 which is logical because it isn't the IPV4 address of your machine.

The bridge0 network is the default Docker network. If you don't specify a network your Docker container will be deployed inside this network.

You can do: docker inspect network bridge The output of this command will return a subnet like "Subnet": "172.17.0.0/16". Every container will have an IP between this private range.

What you are actually doing is mapping 172.17.X.X:80 on 192.168.8.101:8082 which works when 192.168.8.101 is accessible from you machine.