Login error in client when using rental server (ubuntu-desktop)

[K-Lemu]

I rented a VPS, set up the erupe environment and started the server.
but, when I started the MHF client and tried to connect, I got an "error ! logging in!" was displayed at the top of the client and I couldn't connected.

I used "ufw" to open the port, and when I checked the port opening with the port opening confirmation service, I found that the port was opened without any problem.

I am not very familiar with Linux, but has anyone else had a similar problem?
Or is there a cause or solution?

[FerLuisxd]

I'm on the same page. I know how to read code and I believe those buttons do what you see here. It has nothing to do that you rented a vps, you are succesfully connecting to the server but accessing the port 80, I don't get the process and what should we put on the login/password to get to the next page?

[FerLuisxd]

Also tried checking if ports where opened with https://www.yougetsignal.com/tools/open-ports/
Update: So tried both 127.0.0.1 && local IPV4 (from the router) and both gave me the same issue.
On Debian 11 btw
Update2: So reading the docs again I omited step 5, but after patching it it still has the same error as before... , I wish we had easy access to logs so we can share more but that's it

[FerLuisxd]

FIXED IT @K-Lemu , according to the OLD docs
You need to update the ips in config.json to the EXTERNAL IPV4 (the same one as you have in your host file in windows)

Please @ricochhet update the docs that if you want to host and connect externally that you NEED to put yout EXTERNAL IP(internet ip) and not the INTERNAL ONE

[K-Lemu]

@FerLuisxd
Yes, that is correct.
If start the server using a windows machine or vm, you can write an external or internal IP in config.json and forward the port so that your external friends can access it.
(So far I have also started the server on a submachine and port forwarded it...)

However, when I start the server on vps, I write the external IP in config.json because my VPS has no internal IP, only a borrowed external IP.
And I gave this problem because I cannot log in from outside even though I am using ufw to open the port.

[FerLuisxd]

The docs say that you use the IPV4 of your router (I interpreted it as the local network ip) from this step.

Replace the 127.0.0.1 (localhost) with your external IPV4 address (of your router).

The external IP is the internet IP, that should be on the config.json if you want external people to connect. That fixed the issue for me.

[ricochhet]

Make sure your hosts file is setup correctly as well. You will need to place your VPS IP rather than localhost.

[K-Lemu]

Uh, do you mean I need to set up hosts on the server machine as well as the client?
Also, I run the server on a sub machine (external IP is another ISP) and was able to access and log in from the main machine without any problems.
I used the ufw command to set the port open on the sub machine as well.