I'm working on a 2D top-down multiplayer game, and though I have thoroughly tested it on my LAN network, I would like to distribute it to some friends accross the world so they can test it too. I have read a few topics on hosting WAN servers but it's always for professional things or for websites, but I just want a simple server on which only few people will connect.
I started learning networking just a week ago, so I only know the basics, and if there's a way for them to connect directly to my computer somehow, I'd be happy to know.
I'm using Lua, Love2D and LuaSocket(UDP)
Networking is all about IP addresses. If you are trying to play with both IPv4 and IPv6, get your own IP address via http://whatismyip.live or whatismyip.host etc and (like sorak said) map it with free tools like noip.com . Websites will only give you external IP address. If you are looking for creating a LAN without internet then you would need to find IP address from the network settings.
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I have a raspberry pi connected to my router with a local IP. I want to access the raspberry pi from outside (from another country) the local network via web browser. So, I have purchased a VPS which has its public IP.
Now how can I assign this VPS IP to the raspberry pi or any other local devices?
how can I assign this VPS IP to the raspberry pi or any other local devices?
That's not how the internet works.
In short, the VPS provider has a pool of IPs and it or its ISP is responsible for publishing routes to the rest of the internet, informing the rest of the internet how to route to those IPs.
You can't just "move" the public IP to your local network; the rest of the internet won't route traffic to it. It would be kind of like writing "1600 Pennsylvania avenue" on the front of your house - you wouldn't cause you to get White House mail, right? Because regardless of what you write there, the post office doesn't use it as a source of truth for mail routing.
There's a few of the options you have:
use ngrok to expose an endpoint to your local service. Ngrok's servers can proxy connections back to your local environment without it having to be online. This will be accessible by anyone on the internet, but is more obscure than an ipv4 address which can and will be easily found (see below). This is a quick and easy solution, and what I'd recommend in your case.
you already have the VPS. Run the code there instead of on the raspberry pi. It will almost certainly be more reliable and higher speed than your home internet.
you also already have a public IP, assuming your pi's local router has a route to the internet. the router is performing NAT so that devices "behind" it with only internal addresses can still communicate with the world. You can almost certainly configure your router to forward a certain port to your pi's internal IP address.
set up a VPN between the private networks, or between the individual hosts on the private networks. This is a lot of work and will require more knowledge of IP networking. If this interested you, I'd recommend looking at Wireguard (recommended) or OpenVPN.
Finally, keep in mind that unless you do something to make it not the case, your service, once on a public IP, will be accessible from the wide world. Since IPv4 space is pretty small by 2022 standards, and there are only 65000 some IP ports per address, it won't take nefarious parts of the internet long to find your service. You can't hide in the obscurity of an IPv4 network.
If your public address is ipv6 instead, those are essentially unguessable and much more likely to go unnoticed. Same thing is true of ngrok - since it has very large set of potential URLs, it's hard to guess. Still, I'd set up some sort of authentication in front of the service. It's just good practice, like locking your house.
Run this on vps:
echo "GatewayPorts yes" >> /etc/ssh/sshd_config
And this on your raspberry pi:
ssh -L remote-port:localhost:your-local-port your-vps.com
You will access server using: your-vps.com:remote-port
I am sorry, I dont know if this question is already asked (afaik this wasnt asked based on my search results). I have a computer running a software that needs license from a server in my company's domain. For pulling the license, I need to connect to the company network. Also there is a hardware setup in our company which is not integrated to the network. And I need to process some data from the hardware, and the data has to be shared with the software. So, I make two connections, one ethernet connection to the hardware and other wireless for using the software's license. I tried accessing the data from the hardware in the software through hardware's IP address. The problem is, there is another computer in our company from another location sharing the same IP as the Hardware, and the software tries retrieving the data from that computer and fails. I am sorry, if this is priliminary and I am not a networking person.
Simply put, one of the two systems need to change its IP address.
The alternatives are usually too complex and error prone, and their viability depends on the particularity of your environment:
Use arp command to force your PC IP-Mac mapping
Put a router in front of your hardware that does port forwarding
Use VLANs
I'm building a scraper, and in order to not get banned, I have to make my requests from different IP addresses. Right now I'm doing that with a VPN, but it has several issues.
As I was reading about the topic, everybody was advising the methods I currently use, but those have their own problems.
I noticed that connecting to the same network from different devices gives different IP address. Furthermore, the same device connected to the same network, through WiFi, or through LAN gives different IP address. I'm not too experienced in networks, and don't know if those different addresses are really different, or will reveal that the requests are coming from the same network, but may be a good idea.
And if it is, how can I take advantage of it? Is there a way to programmatically create "fake devices" from the same device, getting different IP addresses? (I'm thinking about VMs or something)
Your public IP address is the one allocated to you (or to a group of Internet users you belong to) by your Internet provider.
On your side of your Internet box, the IP addresses are local addresses. Those local addresses cannot be seen from the outside. So you can change your local IP address as much as you want, the outside world will see you with the same IP.
Your solution could be to rent a server on the cloud and run your scraper on it.
Sorry for rather dumb question, but I seriously have no idea about this topic.
There is a company network that allows each laptop to access the company server. I can access the network, when I am connected to the wifi of the router of the company.
Now the next step would be, to connect my Laptop from my home wifi (internet) to the network of the company.
My questions are:
Is this possible at all?
If yes, what would be the correct terms to search for resources on this topic
Are there any security considerations?
From my understanding there might be the possibility to access the network, by accessing directly the ip of the router? And then have the router somehow authenticate my machine?
It's weird but I would love to be able from my home.
-Yes
-Lots of ways(VPN,Hamachi,RDP)
-each of them has their own flaws but mostly secure as long as you keep your ip to yourself
more of this:
https://resolve.co.uk/blog/article/how-to-connect-to-your-work-network-from-outside-the-office
I have the following scenario:
A Windows PC (with local IP 192.168.0.10) in a small office running a server application on port N.
A smartphone app outside the office which connects to that server and requests data.
In order to make this work I have to do the following:
In the router of the office I open port N and forward requests to PC 192.168.0.10.
I give the (dynamic) IP address of the router to the smartphone user so he can type it in the app. I may use a dynamic DNS service to ease things up.
This works fine but now we want to sell this system to other people. The problem is that it will be very difficult for them to change the router settings, or to use a dynamic DNS service.
Is there a way I can connect the smartphone app to the erver running inside the customer’s office without asking him to configure anything in the router?
I’m thinking of something like TeamViewer. TeamViewer can connect two computers easily and users do not need to know anything about routers, firewalls, port forwarding or dynamic IPs.
TeamViewer must be running some kind of server which works as a bridge between the two computers. We would like to provide such a server to our users (if it’s easy to implement and not very expensive), but we don’t know how.
I think that we could rent some service like www.dyndnsservices.com to provide a dynamic DNS to our customers, but that doesn’t solve the problem of router configuration/port forwarding.
If you wrote nice useful piece of software, I suggest you sell that, don't try to sell the service you know almost nothing about. It is usual for application servers to work (network wise) in the same way as yours, and you don't often see software vendors selling network bridging/forwarding/whatever solutions.