The objective of this project is to make servers of web service, ftp service, VoIP video call service, and manage them centrally from a host in private connection or from remote connection. We will also monitor the services, we are going to install, from this central PC. If there is a problem found like no connectivity, then the monitor agent will notify the network administrator showing the error message.

1. Central Management of
Network and Call Services
Mohammad Nazmul Hossain
Mohammad Ashiqur Rahman
Md Mhabub Hossain
Md Shahinul Haque Chowdhury
Advanced –Multimedia Communication

2. 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).

3. Network and connection:

4. IP Table for Our Network
Device (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 Router
Wireless Linksys 10.10.1.129/25
Internet Linksys 10.10.0.129/25

5. SSH Connection For Remote Management

6. 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

7. Manager 2nd manager
IP:10.10.0.140 IP:10.10.0.141

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

9. 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 = MySQL
P = PHP
P = Perl

10. Main Services (LAMPP)
• http server for Web service
• ProFTPD fo file transfer service
• MySQL Database
• Interpreters for scripting languages

11. HTTP Server
• Command : sudo ./manager-linux-x64.run
• This will open Graphical interface of XAMPP.

12. From terminal: sudo /opt/lamp/lamp start

13. Sample Login

14. 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

15. Connect to ftp server

16. FTP Server

17. FTP server through file browse

18. MONITOR

19. 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.

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

21. Wireshark vs Nagios
• Wireshark: protocol analyzer.
• Nagios: Completely Monitor detect and
receive aterts.

22. IT manager with

24. 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.

25. Prerequisite for NAGIOS
• wget
• build-essential
• apache2
• apache2-utils
• php5-gd
• libgd2-xpm-dev
• libapache2-mod-php5
• postfix

26. Nagios Configuration:
Object Used for
hosts servers or devices being monitored
hostgroups group of hosts
services services being monitored
servicegroups groups of services
timeperiod scheduling of checks and notifications
commands checking hosts and services notifying contacts
event handling
contacts individuals to alert
contactgroups groups of contacts
We have configured two configuration file:
• commands.cfg
• localhost.cfg

27. Localhost.cfg
Can be found in objects folder of Nagios

28. Define a host for the local machine.
define host{
use linux-server
host_name callserver
alias Call Server
address 10.10.0.130
}

29. Define hostgroup for linux machines.
define hostgroup{
hostgroup_name grp6server
alias Group 6 Servers
members webserver,ftpserver,callserver
}

30. Define a service to ping the host or
server machines.
define service{
use local-service
host_name callserver
service_description PING
check_command
check_ping!100.0,20%!500.0.60%
}

31. Commands.cfg
Can be found in objects folder of Nagios

32. Define a command to see a host is
alive by pinging it.
# ‘check-host-alive’ command definition
define command{
command_name check-host-alive
command_line $USER1$/check_ping –H
$HOSTADDRESS$ -w 3000.0,80% -c 5000.0,100% -p 5
}

33. To Enter the Nagios monitor page
• http://localhost/nagios
• Or
• http://127.0.0.1/nagios

34. Nagios Login Page

35. Nagios Monitor Home Page

36. Hosts view in Nagios

37. Host Groups

38. Problems in one page

39. IT manager without Nagios

40. IT Manager with Nagios

41. Nagios-Plugin
• What is plug-in?
• It is a software component that adds a specific
feature to an existing computer program.

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

43. Copy to libexec folder
# cp
/home/amcprak/Downloads/check_asterisk_peers
/usr/local/nagios/libexec/

44. 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.

45. localhost.cfg
define service{
Use local-service
Host_name callserver
Service_description check SIP peers
Check_command check_asterisk_peers
}

46. Output of installed Nagios plugins

47. NRPE Server
• Nagios Remote Plugin Executor
• Nagios cannot execute commands to remote
servers from remote connection.
• NRPE Server do this job remotely for Nagios.

48. Direct Checks
Check_
asterisk
Check_
calls
Asterisk

49. Via Proxy Checks

50. NRPE server & Asterisk peers
availibility check

51. Peers check of remote Asetrisk

52. Service Details View

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

54. Peer Ashiq not Connected

55. CRITICAL status peer not connected

56. TROUBLES
SHOOTS

57. 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

58. Allow host in the Nagios conf file

59. Connection Success With NRPE Server

60. NRPE Unable to Connect Remote
Asterisk

61. Asterisk.ctl needs proper permission

62. Unable to read output
Plugin needs full permission to run

63. Give file permission

64. # chmod 777
Owner
permission
Group
permission
Permission
for Everyone
0 – no permission
1 – execute
2 – write
3 – write and execute
4 – read
5 – read and execute
6 – read and write
7 – read, write, and execute

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

66. Apache server start fail

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

68. Thank You for
Your Attention