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Docker container port mapping 80:80 only works on localhost but not from external access?

datasn.io

1/11/23, 10:09 AM

Logged in my intranet server via SSH on IP 10.10.245.209 (port 22 of course)

Created a docker-compose.yml:

version: '3.8'
services:
  php-apache-environment:
    container_name: php-apache
    image: php:8.0-apache
    volumes:
      - ./php/src:/var/www/html/
    ports:
      - 80:80

And in ./php/src I have index.php:

<?php
echo 123+123;

I use docker-compose up -d in the current directory, and the container is successfully started:

CONTAINER ID   IMAGE                    COMMAND                  CREATED          STATUS                    PORTS                               NAMES
9795a5fdd59f   php:8.0-apache           "docker-php-entrypoi…"   19 minutes ago   Up 19 minutes             0.0.0.0:80->80/tcp, :::80->80/tcp   php-apache

Now if I use lynx http://localhost or lynx http://127.0.0.1, it's correctly returning:

As the web page. But when I try to access the server http://10.10.245.209 in Chrome, it keeps circling for a few seconds and then nothing (ERR_EMPTY_RESPONSE).

lsof -i:80 results:

COMMAND     PID USER   FD   TYPE DEVICE SIZE/OFF NODE NAME
docker-pr 24074 root    4u  IPv4 129863      0t0  TCP *:http (LISTEN)
docker-pr 24081 root    4u  IPv6 131383      0t0  TCP *:http (LISTEN)

According to docs and some searches in Google, everything I did was correct?

What could be wrong here?

2040

0 + 0

httpd

web-server

docker

Itai Ganot

1/11/23, 10:12 AM

Did you open port 80 in the firewall?

djdomi

1/11/23, 10:43 AM

I would use a other port as 80 on the container due I had a fault in the mapping of the container, however the question is what `lsof -I :80` is telling

datasn.io

1/11/23, 12:00 PM

@Itai How do I know if port 80 is open?

datasn.io

1/11/23, 12:02 PM

`lsof -I :80` gives me `lsof: illegal option character: I`

datasn.io

1/11/23, 12:34 PM

@djdomi I've updated the output of `lsof -i:80` in the question.

datasn.io

1/11/23, 12:37 PM

@djdomi By `a other port as 80 on the container`, do you mean the container port or the host port?

djdomi

1/11/23, 5:58 PM

I would use port 8080 for the host, since port 80 seems to be fixed used in the container

Elon Musk

I sit in a Tesla and translated this thread with Ai:

EN: Docker container port mapping 80:80 only works on localhost but not from external access?

TH: การแมปพอร์ตคอนเทนเนอร์นักเทียบท่า 80:80 ใช้งานได้กับ localhost เท่านั้น แต่ไม่ใช่จากการเข้าถึงภายนอก

RO: Maparea portului containerului Docker 80:80 funcționează numai pe localhost, dar nu și din acces extern?

RU: Сопоставление портов контейнера Docker 80:80 работает только на локальном хосте, но не при внешнем доступе?

VI: Ánh xạ cổng bộ chứa Docker 80:80 chỉ hoạt động trên máy chủ cục bộ chứ không hoạt động từ quyền truy cập bên ngoài?

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