CODEWITHSUNDEEP
dockerwebbrowser
user7693832
user7693832

Reputation: 6859

"Not allowed to use restricted network port" (WebKitErrorDomain:103)

In my Server(CentOS 7.9) I running a docker container.

[root@att ~]# docker ps 
CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS              PORTS                    NAMES
028fe4b64697        training/webapp     "python app.py"     21 minutes ago      Up 21 minutes       0.0.0.0:6000->5000/tcp

this is a web page.

I can in my local macOS wget the page:

wget remote_ip:6000

and get the index.html, but I can not access in Browser, it report error:

The Safari browser cannot open the page "http://demo.com:6000/". The error is: "Not allowed to use restricted network port" (WebKitErrorDomain:103)

Upvotes: 0

Views: 2550

Answers (1)

MSurrow
MSurrow

Reputation: 1235

I was just running into this problem myself. Seems browsers block certain ports in the 6000-range. Not just Safari, but also Chrome/Chromium link, and Firefox as well.

>    6000,  // X11
>    6566,  // sane-port
>    6665,  // Alternate IRC [Apple addition]
>    6666,  // Alternate IRC [Apple addition]
>    6667,  // Standard IRC [Apple addition]
>    6668,  // Alternate IRC [Apple addition]
>    6669,  // Alternate IRC [Apple addition]
>    6697,  // IRC + TLS

This seems to be for security reasons (I havn't dived into this). Mozilla has a reference to a cross-protocol attack. That might explain why the 6xxx ports that are blocked are also standard ports for certain applications (e.g. X11, IRC).

Solution: Either use https or another port. If on Chrome you can start chrome with explicitly allowing ports.

Upvotes: 2

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