how to access a code-server container from a different host?

[yan-guojun]

After I start the below command:
docker run -it --name code-server -p 10.68.177.71:8080:8080 -v "$HOME/.config:/home/coder/.config" -v "$PWD:/home/coder/project" -u "$(id -u):$(id -g)" -e "DOCKER_USER=$USER" -e "PASSWORD=abcdef" codercom/code-server:latest
I can access the server via "http://10.68.177.71:8080".
but I cannot access the server via another host machine, such as 10.68.177.72. Anyway, ping works OK and curl http://10.68.177.71:8088 doesn't work.
I checked the firewall and forwarding bridge, network, they are all fine.
it seems the code-server application refused to accept the request from different host.
anyone can give a help? thanks

[code-asher]

Is the 8088 a typo? If not maybe you just need 8080.

Otherwise, I am not sure. Maybe try binding to all interfaces with 0.0.0.0 instead?

If that does not help, do you experience the same problem with other web servers? For example if you were to run python3 -m http.server --bind 10.68.177.71 8080 then try curling that from a different host.

[yan-guojun]

Yes, 8088 was just a typo. the command I tried is "curl http://10.68.177.71:8080"
I also tried the 0.0.0.0 instead, failed as well.
Anyway, for web server, such as "python3 -m http.server --bind 10.68.177.71 8080", connection from other hosts can be successful.
It seems the code server only works for local host when it runs inside a container.
What I can do now is to work with a SSH tunnel, it's weird anyway.

[code-asher]

Does it refuse connection entirely or does it return an error message? I am wondering if it could be the origin check in code-server. If you run in debug mode (codercom/code-server:latest --log debug) and check the logs it will tell you if requests are being blocked due to origin checks.

[yan-guojun]

It seems no message got on code-server. I tried the command "docker run -it --name code-server -p 10.68.177.71:8080:8080 -v "$HOME/.config:/home/coder/.config" -v "$PWD:/home/coder/project" -u "$(id -u):$(id -g)" -e "DOCKER_USER=$USER" -e "PASSWORD=abcdef" codercom/code-server:latest --log debug" and the log out is as below:

[2023-07-18T01:00:08.401Z] debug parent:33 spawned child process 51
[2023-07-18T01:00:08.704Z] debug child:51 initiating handshake
[2023-07-18T01:00:08.708Z] debug parent:33 got message {"message":{"type":"handshake"}}
[2023-07-18T01:00:08.710Z] debug child:51 got message {"message":{"type":"handshake","args":{"bind-addr":"0.0.0.0:8080","auth":"password","password":"","config":"/home/coder/.config/code-server/config.yaml","_":["/home/coder"],"log":"debug","user-data-dir":"/home/coder/.local/share/code-server","extensions-dir":"/home/coder/.local/share/code-server/extensions","session-socket":"/home/coder/.local/share/code-server/code-server-ipc.sock","verbose":false,"host":"0.0.0.0","port":8080,"proxy-domain":[],"usingEnvPassword":true,"usingEnvHashedPassword":false}}}
[2023-07-18T01:00:08.711Z] info code-server 4.14.1 5c19962
[2023-07-18T01:00:08.711Z] info Using user-data-dir ~/.local/share/code-server
[2023-07-18T01:00:08.718Z] info Using config file ~/.config/code-server/config.yaml
[2023-07-18T01:00:08.718Z] info HTTP server listening on http://0.0.0.0:8080/
[2023-07-18T01:00:08.718Z] info - Authentication is enabled
[2023-07-18T01:00:08.718Z] info - Using password from $PASSWORD
[2023-07-18T01:00:08.718Z] info - Not serving HTTPS
[2023-07-18T01:00:08.718Z] info Session server listening on /home/coder/.local/share/code-server/code-server-ipc.sock

then I tried command on another host:
ping 10.68.177.71
PING 10.68.177.71 (10.68.177.71) 56(84) bytes of data.
64 bytes from 10.68.177.71: icmp_seq=1 ttl=62 time=4.95 ms
64 bytes from 10.68.177.71: icmp_seq=2 ttl=62 time=5.48 ms
64 bytes from 10.68.177.71: icmp_seq=3 ttl=62 time=7.67 ms
64 bytes from 10.68.177.71: icmp_seq=4 ttl=62 time=7.18 ms
curl http://10.68.177.71:8080
curl: (28) Failed to connect to 10.68.177.71 port 8080: Connection timed out

There is no log output on the host of 10.68.177.71, then the connection timed out on the connecting host.

[code-asher]

Thank you for giving it a try! It does seem like the request never even makes it to code-server but I have no idea why. Since other web servers work it seems like your firewall and network are fine and since it works on the host machine it seems like Docker is binding correctly. Sorry I am not able to be of more help.