https://docs.nextcloud.com/server/15/admin_manual/configuration_server/reverse_proxy_configuration.html

https://try.nextcloud.com/

overwriteprotocol

Source: Accepting a remote share: Failed to perform action · Issue #13612 · nextcloud/server

How to Install and Configure LDAP Client on Ubuntu

On the client systems, you will needs to install a few necessary packages to make authentication mechanism function correctly with an LDAP server.

Configure LDAP Client in Ubuntu 16.04 and 18.04

UBUNTU < 20.04

STEP1: First start by installing the necessary packages by running the following command.

$ sudo apt update && sudo apt install libnss-ldap libpam-ldap ldap-utils nscd

During the installation, you will be prompted for details of your LDAP server (provide the values according to your environment). Note that the ldap-auth-config package which is auto-installed does the most of the configurations based on the inputs you enter.

Next, enter the name of the LDAP search base, you can use the components of their domain names for this purpose as shown in the screenshot.

Also choose the LDAP version to use and click Ok.

Now configure the option to allow you to make password utilities that use pam to behave like you would be changing local passwords and click Yes to continue..

Next, disable login requirement to the LDAP database using the next option.

Also define LDAP account for root and click Ok.

Next, enter the password to use when ldap-auth-config tries to login to the LDAP directory using the LDAP account for root.

The results of the dialog will be stored in the file /etc/ldap.conf. If you want to make any alterations, open and edit this file using your favorite command line editor.

STEP2: Next, configure the LDAP profile for NSS by running.

$ sudo auth-client-config -t nss -p lac_ldap

Then configure the system to use LDAP for authentication by updating PAM configurations. From the menu, choose LDAP and any other authentication mechanisms you need. You should now be able to log in using LDAP-based credentials.

$ sudo pam-auth-update

In case you want the home directory of the user to be created automatically, then you need to perform one more configuration in the common-session PAM file.

$ sudo vim /etc/pam.d/common-session

Add this line in it.

session required pam_mkhomedir.so skel=/etc/skel umask=077

Save the changes and close the file. Then restart the NCSD (Name Service Cache Daemon) service with the following command.

$ sudo systemctl restart nscd
$ sudo systemctl enable nscd

Note: If you are using replication, LDAP clients will need to refer to multiple servers specified in /etc/ldap.conf. You can specify all the servers in this form:

uri ldap://ldap1.example.com  ldap://ldap2.example.com

This implies that the request will time out and if the Provider (ldap1.example.com) becomes unresponsive, the Consumer (ldap2.example.com) will attempt to be reached to process it.

To check the LDAP entries for a particular user from the server, run the getent command, for example.

$ getent passwd tecmint

If the above command displays details of the specified user from the /etc/passwd file, your client machine is now configured to authenticate with the LDAP server, you should be able to log in using LDAP-based credentials.

UBUNTU ≥ 20.04

Skip STEP2 previosly stated and procede with STEP3

STEP3:

After the installation, edit /etc/nsswitch.confand add ldap authentication to passwd and group lines.

passwd: compat systemd ldap
group: compat systemd ldap
shadow: compat

Modify the file /etc/pam.d/common-password. Remove use_authtok on line 26 to look like below.

password [success=1 user_unknown=ignore default=die] pam_ldap.so try_first_pass

Enable creation of home directory on first login by adding the following line to the end of file /etc/pam.d/common-session

session optional pam_mkhomedir.so skel=/etc/skel umask=077

Test by switching to a user account on LDAP

root@server1:~# sudo su - jmutai
Creating directory '/home/jmutai'.
jmutai@server1:~$ id
uid=10000(jmutai) gid=10000(sysadmins) groups=10000(sysadmins)

Credits go to:

https://www.tecmint.com/configure-ldap-client-to-connect-external-authentication/

https://computingforgeeks.com/how-to-configure-ubuntu-as-ldap-client/

https://www.linux.com/topic/desktop/how-authenticate-linux-desktop-your-openldap-server/

https://gist.github.com/kuznero/576e848c39080745ac1915c6b3e4820b

https://vpntut.com/openvpn-on-azure/

https://help.nextcloud.com/t/why-is-owncloud-still-faster-than-nextcloud-after-all-this-time/58420

https://www.digitalocean.com/community/tutorials/how-to-set-up-an-openvpn-server-on-ubuntu-18-04

https://openvpn.net/vpn-server-resources/microsoft-azure-byol-appliance-quick-start/

Henryk Mikołaj Górecki (Polish: [ˈxɛnrɨk mʲiˈkɔwaj ɡuˈrɛtskʲi]; English pronunciation Goo-RET-ski; 6 December 1933 – 12 November 2010) was a Polish composer of contemporary classical music. According to critic Alex Ross, no recent classical composer has had as much commercial success as Górecki. Górecki became a leading figure of the Polish avant-garde during the post-Stalin cultural thaw.^[5][6] His Webernian-influenced serialist works of the 1950s and 1960s were characterized by adherence to dissonant modernism and drew influence from Luigi Nono, Karlheinz Stockhausen, Krzysztof Penderecki and Kazimierz Serocki. He continued in this direction throughout the 1960s, but by the mid-1970s had changed to a less complex sacred minimalist sound, exemplified by the transitional Symphony No. 2 and the hugely popular Symphony No. 3 (Symphony of Sorrowful Songs). This later style developed through several other distinct phases, from such works as his 1979 Beatus Vir, to the 1981 choral hymn Miserere, the 1993 Kleines Requiem für eine Polka and his requiem Good Night.

He was largely unknown outside Poland until the mid-to late 1980s, and his fame arrived in the 1990s. In 1992, 15 years after it was composed, a recording of his Third Symphony, Symphony of Sorrowful Songs—recorded with soprano Dawn Upshaw and released to commemorate the memory of those lost during the Holocaust—became a worldwide commercial and critical success, selling more than a million copies and vastly exceeding the typical lifetime sales of a recording of symphonic music by a 20th-century composer. As surprised as anyone at its popularity, Górecki said, “Perhaps people find something they need in this piece of music […] somehow I hit the right note, something they were missing. Something somewhere had been lost to them. I feel that I instinctively knew what they needed.” This popular acclaim did not generate wide interest in Górecki’s other works, and he pointedly resisted the temptation to repeat earlier success, or compose for commercial reward.

Apart from two brief periods studying in Paris and a short time living in Berlin, Górecki spent most of his life in southern Poland.

https://en.wikipedia.org/wiki/Henryk_G%C3%B3recki