Central Management of Network and Call Services

Mohammad Nazmul HossainMohammad Ashiqur RahmanMd Mhabub HossainMd Shahinul Haque Chowdhury

Advanced –Multimedia Communication

Abstract

• Make servers of web service, ftp service, VoIP video call service

• Monitor & manage them centrally from a host in private connection or from remote connection.

• The remote connection can be established through Secure Shell (SSH) connection which will connect to the servers through Router (or Routers).

Network and connection:

IP Table for Our NetworkDevice (Hostname) Interfaces Used Software IP Address Gateway

Monitor Server NIC Nagios 10.10.0.135/25 10.10.0.129

Call Server NIC Asterisk 10.10.0.130/25 10.10.0.129

http Server VM XAMPP 10.10.0.131/25 10.10.0.129

ftp Server VM ProFTPD 10.10.0.132/25 10.10.0.129

IP Phone NIC Grandstream 10.10.0.140/25 10.10.0.129

IP Phone NIC Grandstream 10.10.0.141/25 10.10.0.129

Switch Vlan99 Catalyst 2960 10.10.0.200/25 10.10.0.129

Wi-Fi RouterWireless Linksys 10.10.1.129/25

Internet Linksys 10.10.0.129/25

SSH Connection For Remote Management

Call Server

• We used Asterisk as call server.• IP: 10.10.0.130 (call server IP)• SIP.conf (Configuration file)• Extensions.conf (Configuration file)• We have video call service enabled

-We have used GXV3140 IP Multimedia Phone

Manager 2nd managerIP:10.10.0.140 IP:10.10.0.141

We can use call server service by any smart phone remotely using Antisip.

VoIP by antisip

HTTP Server

• We are using HTTP server to get the Web service.• The HTTP server has setup using LAMPP (Common

name XAMPP) software• XAMPP stand for

X = Any of the different operating systems A = Apache

M = MySQLP = PHPP = Perl

Main Services (LAMPP)

• http server for Web service• ProFTPD fo file transfer service• MySQL Database• Interpreters for scripting languages

HTTP Server

• Command : sudo ./manager-linux-x64.run

• This will open Graphical interface of XAMPP.

From terminal: sudo /opt/lamp/lamp start

Sample Login

FTP Server

• ProFTPD is an open source software for file transfer service Ubuntu or Linux based OS.

• We are using ProFTPD software for file transfer service

Connect to ftp server

FTP Server

FTP server through file browse

MONITOR

WHY??

• Network monitoring is the information collection function of network management.

• Network monitoring provides the information necessary for network management. It is important to find network trends and locate network problems quickly.

• Can automatically detect and respond to threats and performance issues in real time, as well as predict possible issues in the future.

There are generally three basic goals for network monitoring:• Performance monitoring• Fault monitoring• Account monitoring

Wireshark vs Nagios

• Wireshark: protocol analyzer.

• Nagios: Completely Monitor detect and receive aterts.

IT manager with

Benefits of Nagios

• Allows to detect and resolve problems before they have a negative effect on Networks.

• Can completely monitor and receive alerts for Networks services, servers, switches and applications, and even mitigate any future issues.

• Fully flexible and scalable, and gives total peace-of-mind that IT systems will continue running without causing any interruptions.

Prerequisite for NAGIOS

• wget• build-essential• apache2• apache2-utils• php5-gd• libgd2-xpm-dev• libapache2-mod-php5• postfix

Nagios Configuration:

Object Used forhosts servers or devices being monitoredhostgroups group of hostsservices services being monitoredservicegroups groups of servicestimeperiod scheduling of checks and notificationscommands checking hosts and services notifying contacts

event handlingcontacts individuals to alertcontactgroups groups of contacts

We have configured two configuration file:• commands.cfg• localhost.cfg

Localhost.cfgCan be found in objects folder of Nagios

Define a host for the local machine.

define host{use linux-serverhost_name callserveralias Call Server

address 10.10.0.130}

Define hostgroup for linux machines.

define hostgroup{hostgroup_name grp6serveralias Group 6 Serversmembers webserver,ftpserver,callserver

}

Define a service to ping the host or server machines.

define service{use local-servicehost_name callserverservice_description PINGcheck_command check_ping!100.0,20%!500.0.60%

}

Commands.cfgCan be found in objects folder of Nagios

Define a command to see a host is alive by pinging it.

# ‘check-host-alive’ command definitiondefine command{command_name check-host-alivecommand_line $USER1$/check_ping –H

$HOSTADDRESS$ -w 3000.0,80% -c 5000.0,100% -p 5}

To Enter the Nagios monitor page

• http://localhost/nagios

• Or

• http://127.0.0.1/nagios

Nagios Login Page

Nagios Monitor Home Page

Hosts view in Nagios

Host Groups

Problems in one page

IT manager without Nagios

IT Manager with Nagios

Nagios-Plugin

• What is plug-in?• It is a software component that adds a specific

feature to an existing computer program.

Install Nagios plugins• https://exchange.nagios.org/directory/Plugins/Telephony/Asterisk

Copy to libexec folder

# cp /home/amcprak/Downloads/check_asterisk_peers /usr/local/nagios/libexec/

commands.cfg#’check_asterisk_peers’ command definition

Define commands{

Command_name check_asterisk_peers

Command_line $USER1$/check_asterisk_peers $ARG1$ -p ‘’Manager 2nd –manager’’

}

-p A space separated list of peers to check.

localhost.cfgdefine service{Use local-serviceHost_name callserverService_description check SIP peersCheck_command check_asterisk_peers}

Output of installed Nagios plugins

NRPE Server

• Nagios Remote Plugin Executor• Nagios cannot execute commands to remote

servers from remote connection.• NRPE Server do this job remotely for Nagios.

Direct Checks

Check_asterisk

Check_calls

Asterisk

Via Proxy Checks

NRPE server & Asterisk peers availibility check

Peers check of remote Asetrisk

Service Details View

Flapping

• (7 observed state changes / possible 20 state changes) * 100 = 35 %

Peer Ashiq not Connected

CRITICAL status peer not connected

TROUBLES

SHOOTS

SSL handshake

• ./check_nrpe –H 10.10.0.130• Check_nrpe: error – could not complete SSL handshake

• By default nrpe.cfg allowed_hosts line only holds localhost address:

• allowed_hosts=127.0.0.1 • We have to put the nagios IP address here:• allowed_hosts=127.0.0.1, 10.10.0.135

Allow host in the Nagios conf file

Connection Success With NRPE Server

NRPE Unable to Connect Remote Asterisk

Asterisk.ctl needs proper permission

Unable to read outputPlugin needs full permission to run

Give file permission

# chmod 777

Owner permission

Group permission

Permission for Everyone

0 – no permission1 – execute2 – write3 – write and execute

4 – read5 – read and execute6 – read and write7 – read, write, and execute

• /usr/local/nagios/plugins/check_nrpe -H comxps -c check_openmanage NRPE: Unable to read output

Apache server start fail

• Go to terminal > service apache2 status• service apache2 stop

Thank You for Your Attention