Author Archives: Vyacheslav

Adding a SIP client to FreePBX

To add a SIP client to FreePBX, open the menu “Applications” – “Extensions“, choose for example “Generic CHAN SIP Device” and we indicate the main parameters:

User Extension: 6000 (SIP number)
Display Name: Operator (any name to display)
Secret: PASSWORD
and click “Submit“.

Done, SIP is added, it can already be registered at the specified number and password.

How to add SIP in the configuration file I described in this article – Adding SIP clients to Asterisk

Solving the error “insserv: warning: script ‘script’ missing LSB tags and overrides”

I noticed once the following error:

insserv: warning: script ‘MyScript.sh’ missing LSB tags and overrides

It appears because someone wrote the /etc/init.d/MyScript.sh script before writing the LSB tags first.

To fix this, I opened the script code in a text editor (in the editor nano Ctrl+X to exit, y/n to save or cancel changes):

sudo nano /etc/init.d/MyScript.sh

And added in the beginning:

### BEGIN INIT INFO
# Provides:          MyScript
# Required-Start:
# Required-Stop:
# Default-Start:     2 3 4 5
# Default-Stop:      1 0 6
# Short-Description: ...
# Description: ...
### END INIT INFO

See also:
Run application at startup in Ubuntu

Configuring email notifications in Zabbix via iRedMail

On the test I will use Zabbix 3.0.3 and iRedMail 0.9.4 installed in Ubuntu Server 14.04.4 LTS.

First, in the Zabbix panel, activate the action by opening the tab “Configuration” – “Actions” and activate “Report problems to Zabbix administrators“. In it I also, to see the names of the hosts, changed both topics of the letter with:

{TRIGGER.STATUS}: {TRIGGER.NAME}

on

{TRIGGER.STATUS}: {HOST.NAME1} {TRIGGER.NAME}

In Zabbix, the email notification method was initially added, but depending on the settings of the mail server it can work or not work. You can find it by going to Zabbix under the administrator and opening the tab “Administration” – “Media types” – “Email“.

When configuring with iRedMail, I specified the following parameters:

Name: Email
Type: Email
SMTP server: mail.example.com
SMTP server port: 25
SMTP helo: example.com
SMTP email: user@example.com
Connection security: STARTTLS
Checkboxes for “SSL verify peer” and “SSL verify host” did not put
Authentication: Username and password
Username: user@example.com
Password: PASSWORD
check for “Enabled”

If the mail server is in the same system as the Zabbix server, you can try to configure both the above, but where “Connection security” and “Authentication” select “None”.

Also in the user profile, in the tab “Media” need to add:

Type: Email
Send to: mail for notifications
When active: time when it is allowed to be alerted
Use if severity: what importance of notification to send
check for “Enabled”

Done.

Installing the Digium Asterisk GUI

Digium Asterisk GUI – web-management interface Asterisk.

Today I’ll sculpt it to Asterisk 11 on Ubuntu Server 14.04 LTS.
Switch directly to the root user:

sudo -i

Download it:

apt-get install subversion
mkdir -p ~/asterisk-gui
cd ~/asterisk-gui
svn checkout http://svn.digium.com/svn/asterisk-gui/branches/2.0/

We compile and install:

cd 2.0
./configure
make
make install

Just in case, we’ll make a copy of the Asterisk configuration files:

cp -r /etc/asterisk /etc/asterisk.original

Open the configuration file manager.conf for example in the editor nano (Ctrl+X to exit the editor, y/n to save or cancel changes):

nano /etc/asterisk/manager.conf

The main parameters that must be configured in the manager.conf configuration file are:

[general]
enabled = yes
webenabled = yes
bindaddr = 0.0.0.0
[USERNAME]
secret = PASSWORD
read = system,call,log,verbose,command,agent,user,config
write = system,call,log,verbose,command,agent,user,config

At the very end of the file, replace the symbol # with; otherwise you can not enter under the login and password specified above.

Now edit http.conf:

nano /etc/asterisk/http.conf

In it we will specify the following parameters of the web server:

enabled=yes
enablestatic=yes
bindaddr=0.0.0.0
prefix=asterisk

Let’s check the settings:

make checkconfig

Delete the empty folder and specify a link to the real one with the files of the web server:

rmdir /usr/share/asterisk/static-http/
ln -s /var/lib/asterisk/static-http/ /usr/share/asterisk/

Restarting Asterisk:

/etc/init.d/asterisk restart

Now Digium Asterisk GUI should open by link http://192.168.56.102:8088/asterisk/static/config/index.html, where 192.168.56.102 this is the IP or Server domain with Asterisk.

To log in, we’ll specify the username and password you wrote earlier in the manager.conf file

Done.

Zabbix installation on Ubuntu from distribution packages

On the test, I installed Zabbix 3.4 in Ubuntu 14.04 LTS, Ubuntu 16.04 LTS, Ubuntu 18.04 LTS.
Links to other versions of Zabbix can be found on the official website www.zabbix.com or http://repo.zabbix.com/zabbix/.
For example, Zabbix 3.4 for Ubuntu is located here http://repo.zabbix.com/zabbix/3.4/ubuntu/pool/main/z/zabbix-release/.

After installing Zabbix, transferred the data from the old Zabbix 2.2 server to it, simply exporting the templates first, then network nodes, set cards and complex screens.

Let’s proceed to installation, add the official source of packages to the system (example for Ubuntu 14.04 LTS (trusty)):

wget http://repo.zabbix.com/zabbix/3.4/ubuntu/pool/main/z/zabbix-release/zabbix-release_3.4-1+trusty_all.deb
sudo dpkg -i zabbix-release_3.4-1+trusty_all.deb
sudo apt update

For Ubuntu 16.04 LTS (xenial):

wget http://repo.zabbix.com/zabbix/3.4/ubuntu/pool/main/z/zabbix-release/zabbix-release_3.4-1+xenial_all.deb
sudo dpkg -i zabbix-release_3.4-1+xenial_all.deb
sudo apt update

For Ubuntu 18.04 (Bionic Beaver):

wget http://repo.zabbix.com/zabbix/3.4/ubuntu/pool/main/z/zabbix-release/zabbix-release_3.4-1+bionic_all.deb
sudo dpkg -i zabbix-release_3.4-1+bionic_all.deb
sudo apt-get update

Perform the installation of Zabbix:

sudo apt-get install zabbix-server-mysql zabbix-frontend-php zabbix-agent

Connect to the MySQL server and create a database:

mysql -uroot -p
create database zabbix character set utf8 collate utf8_bin;
grant all privileges on zabbix.* to zabbix@localhost identified by 'ПАРОЛЬ';
quit;

We import the standard data into the created database:

cd /usr/share/doc/zabbix-server-mysql
zcat create.sql.gz | mysql -uroot -p zabbix

For example, open the Zabbix server configuration file in the nano text editor (in nano, press Ctrl+X to exit, y/n to save or cancel changes):

sudo nano /etc/zabbix/zabbix_server.conf

Specify the MySQL database name, user name and password:

DBHost=localhost
DBName=zabbix
DBUser=zabbix
DBPassword=PASSWORD

Run the Zabbix server process:

sudo service zabbix-server start

You need to fix the PHP configuration for Zabbix. The Apache configuration file for the Zabbix web interface is located in /etc/apache2/conf.d/zabbix or /etc/apache2/conf-enabled/zabbix.conf. Some minimal PHP configuration parameters have already been set there:

php_value max_execution_time 300
php_value memory_limit 128M
php_value post_max_size 16M
php_value upload_max_filesize 2M
php_value max_input_time 300
php_value always_populate_raw_post_data -1
php_value date.timezone Europe/Kiev

Restart the web server to apply the changes:

sudo service apache2 restart
sudo service zabbix-server restart

Make sure that the Zabbix agent and the Zabbix server are started at system startup and, if necessary, enable:

sudo systemctl is-enabled zabbix-agent.service
sudo systemctl is-enabled zabbix-server.service
sudo systemctl enable zabbix-agent.service
sudo systemctl enable zabbix-server.service

The Zabbix web interface is available through a browser at http://HOST/zabbix.
By default, the user name for logging in through the web interface is admin or Admin, the password is zabbix.

See also:
Installing and Configuring Zabbix Agent in Ubuntu

Asterisk Error Solution “Context ‘local’ tries to include nonexistent context ‘parkedcalls'”

I screwed the DAHDI board somehow and noticed the following error when I dialed the call from the analog line:

WARNING[7238]: pbx.c:12314 ast_context_verify_includes: Context ‘local’ tries to include nonexistent context ‘parkedcalls’

The error occurred because the res_parking module was not loaded to load it, open the asterisk console and execute the command:

sudo asterisk -vvr
module load res_parking

To automatically load it when starting Asterisk, in the file /etc/asterisk/modules.conf, in the [modules] block, add the line:

load => res_parking.so