I would like to install a DHCP server in a container to provide the devices (some raspberry pis and network switches) connected to the host system with IP addresses.
I start the container with "--net=host" flag in order to listen on broadcast traffic. It is working as expected. All devices get their IP address from the DHCP server.
However, the "--net=host" option represents an increased security risk. Do you know if there is a better option to acchieve the same? I could install both docker and podman on my system.
If there is no other option, how could I restrict the visibility of the network from the container so that it can only see the specific network interface where all devices are connected?
Related
I have 2 network interfaces on my Mac - en0 for regular Ethernet connection, en6 for a USB LTE modem, the latter has higher priority. I'm running a node.js app in a Docker container, when I make an outbound request from this container, I can see the IP of the modem. For some heavy requests I'd like to be able to use the regular Ethernet connection. Is this possible? Thanks
So I am having a pterodactyl installation on my node,
I am aware that pterodactyl runs using docker so to protect my Backend IP from being exposed when connecting to the servers I am using a GRE Tunnel from X4B.net
After installing the script I was provided by X4B I got this message
Also Note: This script does not adjust the configuration of your applications. You should ensure your applications are bound to 0.0.0.0 or the appropriate tunnel IP.
At first I was confused and tried connecting to my server but nothing worked, so I was thinking that it was due the docker not being bounded to 0.0.0.0
As for the network layout I was provided with:
10.16.1.200/30 Network,
10.16.1.201 Unified Gateway,
10.16.1.202 Bound via NAT to 103.249.70.63,
10.16.1.203 Broadcast
So If I host a minecraft server what IP address would I use?
Hello sorry for stupid question.. But i have googled it for a week and still can't find the answer.
Currently I'm using Virtualbox for ubuntu server 18.04 and I have installed docker on it. I have run docker apache server by using sudo docker pull httpd and sudo docker run -t --name apache -p 8080:80 httpd
And there is the problem. I can show the website by using curl 127.0.0.1:8080 but i can't access from the other network or other machine in different network.
For instance my virtualbox's ip address is 1.1.1.1 and host pc which is window is 2.2.2.2.
When i ping to each other it all works. But when i try to access 1.1.1.1:8080 from host pc i can't access
What should i check or do to solve this problem.
Thank you
For "1.1.1.1:8080" access on the host- Try opening TCP traffic on port 8080 of your virtual machine with firewall-cmd or an equivalent Ubuntu utility. "1.1.1.1:8080" should then become available on your host server.
For "2.2.2.2:XXXX" access from other devices on your home network(s)- You might need to both route the port of your VM to a port of your host (unless you have a pass-through NIC configured on the VM) on the VM manager plus open an additional firewall on your host server on the host port you've mapped to for access by other devices on your home network. After those steps on the host port "2.2.2.2:XXXX" should be the web server IP accessible by any device on your network(s).
For PUBLIC_IP:PUBLIC_PORT access from outside networks (external to your modem and available to the world)- IPs on your home networks can't be accessed from other networks. Access from other devices on your network is controlled by your firewall on your OS. Access from outside networks is controlled by port forwarding on your modem. I don't recommend port forwarding for a custom app unless you understand some of the security loopholes that can exist on a development web server. But to manage port forwarding go to http://INTERNAL_IP_OF_YOUR_MODEM and you'll get a management interface for managing your port forwarding settings. You'll also see your public IP on your router's management UI or by googling "my ip address".
You can map your modem's IP to an official www web domain with a web domain service like GoDaddy. You can map your internal IPs to internally known web domains by editing /etc/hosts files on the devices on your network.
I have a a docker container with a few images running there. I run them via docker-compose up command. On my device everything works well with localhost but I want to make so that other devices in the same network will be able to access the MQTT broker as well. How do I do that?
Currently, in my code I do this:
ws:localhost:9001
But since this localhost applies only for the device that runs docker, another laptop won't be able to use it. How do I solve that?
You use the LAN IP address of your machine (the one hosting the docker containers) in place of localhost.
We have no way of knowing what that address may be, but it could start with 192.168.x.x or may be 10.x.x.x
By default, Docker has a "bridge" network that will bridge your container to the outside world. Just use the IP address of the computer where your MQTT Broker Container is running, and port 9001, and it should work fine.
If you need to run it on an internal Docker network, you will have to use something like an ADC or TCP Proxy of some sort to allow access to it.
I want to run an application (the OLA server, olad) inside a container under Docker for Mac. (Version 18.06.1-ce-mac73 on Mojave, all up-to-date.) The particular OLA configuration I am using (for the Art-Net protocol) works by sending and receiving UDP broadcast data over port 6454 on a particular physical ethernet interface on the host, which is in turn connected to an external device under control. Normally, when starting the olad server, one specifies the interface or IP address on which it should send/receive the broadcast messages.
My struggle is getting the UDP messages to and from the interface from inside the container. I don't appear to have access to that physical interface or network inside the Docker for Mac container, even if I run with --network host. My understanding is that this is because of a quirk of the way Docker for Mac is implemented, with an extra VM between my container and the hardware. That VM sees the hardware, but I don't.
Simply running the docker instance with -p 6454:6454/udp doesn't work, either, maybe unsurprisingly. I could see where that might allow incoming traffic to the container to find its way to the server, but the server inside still can't find the outside network/device in the other direction. And I'm not sure how OSX would necessarily get that data from the interface to the docker bridge anyway.
How can I get direct, bidirectional access to that interface or network from inside the container? Or if I cannot, is there some kind of workaround, maybe via socat where I could tunnel that network in through a Unix socket that is shareable between host and container?