Question Help Needed: XUI One Load Balancer Installation – "Failed to connect to server" Error

[romeo007]

Hi everyone,


I’m trying to install a load balancer in XUI One, but I keep running into a connection issue.


During the installation, I get the following message:


Connecting to "here.lb.ip.server" <br>Failed to connect to server. Exiting<br>

Things I’ve tried so far:

• Verified that the IP address and port are correct
• Checked that the main server is online and reachable via ping
• Disabled the firewall temporarily to rule out blocking
• Restarted both the main server and the load balancer server

Despite this, the error still persists.


Any guidance or troubleshooting steps would be greatly appreciated!


Thanks in advance.

 

[Arsalan]

dm me i can sort that out

 

[redhat]

dm me i can sort that out

This something that doesn’t require DM.
If you have a solution than you can share public!

 

[romeo007]

The issue was that some time ago you could simply reinstall a load balancer, but now that's no longer possible — you need to do a fresh installation, and the main server must run the same distro as the LB.

If the installation hangs (which is happening now), you shouldn’t try to reinstall it over the top. Instead, you have to completely remove it and then do a clean install. That’s what I had to do, but now everything’s working fine.

Just sharing this in case it helps someone else.

 

[kral64]

do you have ubuntu 22 or 24 ? if yes you need a command .
i can give you that command if that is your problem

 

[julian]

do you have ubuntu 22 or 24 ? if yes you need a command .
i can give you that command if that is your problem

Why not give the command in public and maybe a short explanation so that everyone can use it. Thanks

 

[scrlsuk]

do you have ubuntu 22 or 24 ? if yes you need a command .
i can give you that command if that is your problem

Do you have this command to share?

 

[kral64]

apt update && apt upgrade -y

echo "HostKeyAlgorithms +ssh-rsa" >> /etc/ssh/sshd_config.d/50-cloud-init.conf.conf
echo "PubkeyAcceptedKeyTypes +ssh-rsa" >> /etc/ssh/sshd_config.d/50-cloud-init.conf.conf

systemctl restart sshd # (systemctl restart ssh #for u24)

wget http://de.archive.ubuntu.com/ubuntu/pool/main/o/openssl/libssl1.1_1.1.1f-1ubuntu2_amd64.debsudo dpkg -i libssl1.1_1.1.1f-1ubuntu2_amd64.deb

 

[scrlsuk]

*** Hidden text: cannot be quoted. ***

apt update && apt upgrade -y

echo "HostKeyAlgorithms +ssh-rsa" >> /etc/ssh/sshd_config.d/50-cloud-init.conf.conf
echo "PubkeyAcceptedKeyTypes +ssh-rsa" >> /etc/ssh/sshd_config.d/50-cloud-init.conf.conf

systemctl restart sshd # (systemctl restart ssh #for u24)

wget http://de.archive.ubuntu.com/ubuntu/pool/main/o/openssl/libssl1.1_1.1.1f-1ubuntu2_amd64.debsudo dpkg -i libssl1.1_1.1.1f-1ubuntu2_amd64.deb*** Hidden text: cannot be quoted. ***

root@5AE8AD3:~# wget http://de.archive.ubuntu.com/ubuntu/pool/main/o/openssl/libssl1.1_1.1.1f-1ubuntu2_amd64.debsudo dpkg -i libssl1.1_1.1.1f-1ubuntu2_amd64.de
--2025-09-15 12:38:11-- http://de.archive.ubuntu.com/ubuntu/pool/main/o/openssl/libssl1.1_1.1.1f-1ubuntu2_amd64.debsudo
Resolving de.archive.ubuntu.com (de.archive.ubuntu.com)... 141.30.62.24, 141.30.62.25, 141.30.62.26, ...
Connecting to de.archive.ubuntu.com (de.archive.ubuntu.com)|141.30.62.24|:80...
connected.
HTTP request sent, awaiting response... 404 Not Found
2025-09-15 12:38:11 ERROR 404: Not Found.
--2025-09-15 12:38:11-- http://dpkg/
Resolving dpkg (dpkg)... failed: Name or service not known.
wget: unable to resolve host address ‘dpkg’
libssl1.1_1.1.1f-1ubuntu2_amd64.de: No such file or directory
No URLs found in libssl1.1_1.1.1f-1ubuntu2_amd64.de.

 

[redhat]

root@5AE8AD3:~# wget http://de.archive.ubuntu.com/ubuntu/pool/main/o/openssl/libssl1.1_1.1.1f-1ubuntu2_amd64.debsudo dpkg -i libssl1.1_1.1.1f-1ubuntu2_amd64.de
--2025-09-15 12:38:11-- http://de.archive.ubuntu.com/ubuntu/pool/main/o/openssl/libssl1.1_1.1.1f-1ubuntu2_amd64.debsudo
Resolving de.archive.ubuntu.com (de.archive.ubuntu.com)... 141.30.62.24, 141.30.62.25, 141.30.62.26, ...
Connecting to de.archive.ubuntu.com (de.archive.ubuntu.com)|141.30.62.24|:80...
connected.
HTTP request sent, awaiting response... 404 Not Found
2025-09-15 12:38:11 ERROR 404: Not Found.
--2025-09-15 12:38:11-- http://dpkg/
Resolving dpkg (dpkg)... failed: Name or service not known.
wget: unable to resolve host address ‘dpkg’
libssl1.1_1.1.1f-1ubuntu2_amd64.de: No such file or directory
No URLs found in libssl1.1_1.1.1f-1ubuntu2_amd64.de.

Try:

cd /tmp
wget http://nz2.archive.ubuntu.com/ubuntu/pool/main/o/openssl/libssl1.1_1.1.1f-1ubuntu2.24_amd64.deb
sudo dpkg -i libssl1.1_1.1.1f-1ubuntu2.24_amd64.deb
sudo apt-get -f install  # to fix dependencies if needed

Correct the duplicated .conf.conf to .conf so that SSH picks it up. Example:

echo "HostKeyAlgorithms +ssh-rsa" | sudo tee /etc/ssh/sshd_config.d/50-cloud-init.conf
echo "PubkeyAcceptedKeyTypes +ssh-rsa" | sudo tee /etc/ssh/sshd_config.d/50-cloud-init.conf
sudo systemctl restart sshd

 

[julian]

Hi, has this become a requirement on any lb installation? is this necessary in ubuntu 20 as well? Or is it the solution to install on ubuntu 22, 24?
Thanks

 

[makseoli340]

Hi, has this become a requirement on any lb installation? is this necessary in ubuntu 20 as well? Or is it the solution to install on ubuntu 22, 24?
Thanks

For the newer installs of XUI (22.04+), most of the time installer does that for you. The most common problem is that your LB needs to be on the same ubuntu version as MAIN

 

[panchita23]

Try:

cd /tmp
wget http://nz2.archive.ubuntu.com/ubuntu/pool/main/o/openssl/libssl1.1_1.1.1f-1ubuntu2.24_amd64.deb
sudo dpkg -i libssl1.1_1.1.1f-1ubuntu2.24_amd64.deb
sudo apt-get -f install  # to fix dependencies if needed

Correct the duplicated .conf.conf to .conf so that SSH picks it up. Example:

echo "HostKeyAlgorithms +ssh-rsa" | sudo tee /etc/ssh/sshd_config.d/50-cloud-init.conf
echo "PubkeyAcceptedKeyTypes +ssh-rsa" | sudo tee /etc/ssh/sshd_config.d/50-cloud-init.conf
sudo systemctl restart sshd

Hello. I followed the commands mentioned and managed to install LB with Ubuntu 22.04, but it doesn't play any channels. What am I missing? And another question: Is it possible to update the main system (Ubuntu 20.4) to, say, version 22.04 without losing anything? In other words, without reinstalling the entire service?