ISPConfig Perfect Multiserver setup on Ubuntu 20.04 and Debian 10 - Page 2

3 Installing the webserver

Log in as root or run

su -

to become root user on your server before you proceed. IMPORTANT: You must use 'su -' and not just 'su', otherwise your PATH variable is set wrong by Debian.

3.1 Configure the hostname

The hostname of your server should be a subdomain like "". Do not use a domain name without a subdomain part like "" as hostname as this will cause problems later with your mail setup. First, you should check the hostname in /etc/hosts and change it when necessary. The line should be: "IP Address - space - full hostname incl. domain - space - subdomain part". For our hostname, the file shall look like this:

nano /etc/hosts localhost.localdomain   localhost
# This line should be changed on every node to the correct servername: web01
# These lines are the same on every node: panel web01 mx1 mx2 ns1 ns2 webmail # The following lines are desirable for IPv6 capable hosts ::1 localhost ip6-localhost ip6-loopback ff02::1 ip6-allnodes ff02::2 ip6-allrouters

As you can see, we added the hostnames of our other servers aswell, so they can communicate over the internal network later.

Then edit the /etc/hostname file:

nano /etc/hostname

It shall contain only the subdomain part, in our case:


Finally, reboot the server to apply the change:

systemctl reboot

Log in again and check if the hostname is correct now with these commands:

hostname -f

The output shall be like this:

[email protected]:~$ hostname
[email protected]:~$ hostname -f

3.2 Installing ISPConfig

Now we can run the autoinstaller for all packages and ISPConfig:

wget -O - | sh -s -- --no-mail --no-dns --interactive

After some time, you will see:

WARNING! This script will reconfigure your complete server!
It should be run on a freshly installed server and all current configuration that you have done will most likely be lost!
Type 'yes' if you really want to continue:

Answer "yes" and hit enter. The installer will now start.

When the installation and configuration of the packages is done, the root password for MySQL on web01 will be shown. Write this down (along with the servername, to prevent any confusion later).

Now we will have to answer some questions as we are using interactive mode. This is necessary as this server will be added to your multiserver setup.

[INFO] Installing ISPConfig3.
[INFO] Your MySQL root password is: kl3994aMsfkkeE

 _____ ___________   _____              __ _         ____
|_   _/  ___| ___ \ /  __ \            / _(_)       /__  \
  | | \ `--.| |_/ / | /  \/ ___  _ __ | |_ _  __ _    _/ /
  | |  `--. \  __/  | |    / _ \| '_ \|  _| |/ _` |  |_ |
 _| |_/\__/ / |     | \__/\ (_) | | | | | | | (_| | ___\ \
 \___/\____/\_|      \____/\___/|_| |_|_| |_|\__, | \____/
                                              __/ |

>> Initial configuration  

Operating System: Debian 10.0 (Buster) or compatible

    Following will be a few questions for primary configuration so be careful.
    Default values are in [brackets] and can be accepted with <ENTER>.
    Tap in "quit" (without the quotes) to stop the installer.

Select language (en,de) [en]: <-- Hit enter

Installation mode (standard,expert) [standard]: <-- expert

Full qualified hostname (FQDN) of the server, eg server1.domain.tld  []: <-- Hit Enter

MySQL server hostname [localhost]: <-- Hit Enter

MySQL server port [3306]: <-- Hit Enter

MySQL root username [root]: <-- Hit Enter

MySQL root password []: <-- Enter the MySQL password the script just gave you

MySQL database to create [dbispconfig]: <-- Hit Enter

MySQL charset [utf8]: <-- Hit Enter

The next two questions are about the internal ISPConfig database user and password.
It is recommended to accept the defaults which are 'ispconfig' as username and a random password.
If you use a different password, use only numbers and chars for the password.

ISPConfig mysql database username [ispconfig]: <-- Hit Enter

ISPConfig mysql database password [aakl203920459853sak20284204]: <-- Hit Enter

Shall this server join an existing ISPConfig multiserver setup (y,n) [n]: <-- y

MySQL master server hostname []: <--

MySQL master server port []: <-- Hit Enter

MySQL master server root username [root]: <-- Hit Enter

MySQL master server root password []: <-- the password you gave the external root user on the master server.

MySQL master server database name [dbispconfig]: <-- Hit Enter

Adding ISPConfig server record to database.

Configure Mail (y,n) [y]: <-- n

Configuring Jailkit
Configuring Pureftpd
Configure DNS Server (y,n) [y]: <-- n

The Web Server option has to be enabled when you want run a web server or when this node shall host the ISPConfig interface.
Configure Web Server (y,n) [y]: <-- Hit Enter

Configuring Apache
Configuring vlogger
[WARN] autodetect for OpenVZ failed
Force configure OpenVZ (y,n) [n]: <-- Hit Enter

Skipping OpenVZ

Configure Firewall Server (y,n) [y]: <-- Hit Enter

Configuring Ubuntu Firewall
[WARN] autodetect for Metronome XMPP Server failed
Force configure Metronome XMPP Server (y,n) [n]: <-- Hit Enter

Skipping Metronome XMPP Server

Configuring Fail2ban
Install ISPConfig Web Interface (y,n) [n]: <-- Hit Enter

Do you want to create SSL certs for your server? (y,n) [y]: <-- Hit Enter

Checking / creating certificate for
Using certificate path /etc/letsencrypt/live/
Using apache for certificate validation
Symlink ISPConfig SSL certs to Postfix? (y,n) [y]: <-- Hit Enter

Symlink ISPConfig SSL certs to Pure-FTPd? Creating dhparam file may take some time. (y,n) [y]: <-- Hit Enter

Generating DH parameters, 2048 bit long safe prime, generator 2
This is going to take a long time
Configuring Apps vhost
Configuring DBServer
Installing ISPConfig crontab
Detect IP addresses
Restarting services ...
Installation completed.
[INFO] Adding php versions to ISPConfig.
[INFO] Checking all services are running.
[INFO] mysql: OK
[INFO] clamav-daemon: OK
[INFO] postfix: OK
[INFO] bind9: OK
[INFO] pureftpd: OK
[INFO] apache2: OK
[INFO] Installation ready.
[INFO] Your MySQL root password is: kl3994aMsfkkeE
[INFO] Warning: Please delete the log files in /tmp/ispconfig-ai/var/log/setup-* once you don't need them anymore because they contain your passwords!

Note: if you want to redirect to, follow this guide.

To set this server as default for your websites and databases, log in to ISPConfig and go to System -> Main config. Select as default server.

3.3 Setting up the firewall

The last thing to do is to set up our firewall.

Log in to the ISPConfig UI, and go to System -> Firewall. Then click "Add new firewall record".

Make sure you select the correct server. For our webserver, we have to open the following ports:



No UDP ports have to be opened through the UI.

We are also going to open port 3306, which is used for MySQL, but only from our local network for security reasons. To do so, run the following command from the CLI, after the change from the ISPConfig panel is propagated (when the red dot is gone):

ufw allow from to any port 3306 proto tcp

Your webserver is now ready to use. In the next step, we will install the first mailserver.

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By: arnold61

on web01 no additional php versions are shown in panel, what to do?

By: arnold61

Found later out that passiv ftp option is not used in install script and firewall settings :-(.

By: arnold61

Please correct the script to setup all php versions in multiserver webservers.

By: arnold61

The autoinstaller updates the php versions only in the db of web01.


login with root and given sql pw

export table server_php

remove all lines except the insert into part

remove id in all 7 lines

login as root with panel sql pw

open server_php

import the table

By: arnold61

The autoinstaller sets now only php 5.6 to corrrect server id!

all other versions are set to server_id = 1

so this has to be corrected manually