Troubles with RT 4.2.12 + LDAPImport

Hello to members of the forum. I’m having trouble connecting and importing to AD with Ubuntu 16.04

I have a LAN segment and two virtual machines in it.

RT works great. But Import doesn’t work.

My RT_SiteConfig.pm config file looks like this

After that, I try to send LDAP imports to the server from AD:

sudo /opt/rt4/local/plugins/RT-Extension-LDAPImport/bin/rtldapimport --import

And I get this answer:

Starting import
[1387] [Mon Mar 22 22:30:59 2021] [error]: Can’t conect to ubtrck.ru (/opt/rt4/local/plugins/RT-Extension-LDAPImport/lib/RT/Extension/LDAPImport.pm:1579)
Can’t connect to ubtrck.ru
[1387] [Mon Mar 22 22:30:59 2021] [error]: fetching an LDAP connection failed (/opt/rt4/local/plugins/RT-Extension-LDAPImport/lib/RT/Extension/LDAPImport.pm:1579)
fetching an LDAP connection failed
Starting group import
[1387] [Mon Mar 22 22:30:59 2021] [warning]: Not running a group import, configuration not set (/opt/rt4/local/plugins/RT-Extension-LDAPImport/lib/RT/Extension/LDAPImport.pm:1579)
Not running a group import, configuration not set
Finished import

Please tell me what I did wrong?

Does the RT server have access to the LDAP server? You can test using ldapsearch manually: