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Network Management Tools Presentations. Tuesday, September 18 th & 25 th , 2007 CSE 552 – Network Management Fall 2007 (Term 071) Assignment 2. Schedule of Presentations. NM Tool (Nagios) CSE-552 Assignment#2. Karim Asif Sattar Muhamad Khaled Alhamwi. Outline. Nagios Hosts Services

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Network Management Tools Presentations


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    1. Network Management ToolsPresentations Tuesday, September 18th & 25th, 2007 CSE 552 – Network Management Fall 2007 (Term 071) Assignment 2

    2. Schedule of Presentations

    3. NM Tool (Nagios)CSE-552 Assignment#2 Karim Asif Sattar Muhamad Khaled Alhamwi

    4. Outline • Nagios • Hosts • Services • Configuration files • Configuration Example • Snapshots • Q & A

    5. Nagios • Free & open-source network management tool • Run under Linux • Has web interface • Can be viewed remotely • Can be used to monitor your host and services • Very flexible • Many plug-ins and add-ons

    6. Nagios – cont’ • Not SNMP-based NM tool • Monitor Windows & Linux hosts • Monitor any service • You just need to write the appropriate plug-in • Monitor public services • HTTP, DNS, Email • Monitor private services with the help of other add-ons • CPU, Memory, and Disk usage

    7. Checking Private Services • NSClient++ • Add-on can be used to check Windows hosts Daemon Plug-in Add-on

    8. Hosts • Hosts can be defined with parent-child relation • Useful to reflect the real topology • Hosts can be grouped in different groups • Monitored host has several possible states • UP – The host is up and running • DOWN – The host is not responding • UNREACHABLE – The host can not be reached because some other host in between is down

    9. Services • Services can be grouped in different services • Monitored Service has several possible states • OK – The service is running and performance metric is within the normal range • WARNING – The service is running and performance metric is above normal but below critical range • CRITICAL – The service is not running (crashed) or the performance metric is above critical threshold • UNKNOWN – Unknown error

    10. Configuration files • Main configuration file (includes other files) • nagios.cfg • CGI configuration file (web interface) • cgi.cfg • Check command configuration file • commands.cfg • Hosts configuration • hosts.cfg • Services configuration • services.cfg • You can name the files as you like, and include them in main configuration file • cfg_file=<file_name>

    11. Example • Monitoring of two machines • Localhost (on which nagios is installed) – Linux • Checks for private resources on the localhost • Number of processes, users, Disk usage, and CPU • Another machine on the same subnet – Windows XP • Checks for HTTP service (running) • Checks for DNS service (not installed) • Checks for process “Explorer.exe”

    12. Configuration Example • define host { • use template • host_name localhost • address localhost • …. • } • define host { • use template • host_name Windows host • address 10.90.3.x • …. • }

    13. Configuration Example – cont’ • define service { • service_description Total processes • host_name localhost • check_command check_proc!150!300 • …. • }

    14. Configuration Options • We can define (with examples) • Normal check interval (5 min) • Retry interval (3 min) • Maximum check attempts (4) • Check period (24x7) • Contacts (admin) • Contact groups (admin_group) • Notification period (24x7) • And more…

    15. Snapshots (1) - Authentication • Web interface authentication • Open internet browser and type: • http://localhost/nagios/ in URL field

    16. Snapshots (3) – Tactical overview

    17. Snapshots (4) - Service details

    18. Snapshots (5) – Host details

    19. Snapshots (2) – Host Groups

    20. Snapshots (6) – Host group grid

    21. Snapshots (7) – Host Report

    22. Thank you • Q & A

    23. The DudeNetwork Management Tool Presentation CSE-552 Network Management Term 071 By M. M. Rizwan Farooqi (250501) Mohammad Rahil Rafiq (260308)

    24. Overview • Introduction • System Requirements • Features • Modes of Operation • Interface Layout • Logs • Probes • Snapshots • Pros. & Cons. • Conclusion • References • Q & A

    25. Introduction • Network monitoring tool that incorporates map of the network layout • It helps you visualize the structure of your network • It also provides direct access to network functions specific to each item. • It can automatically discover your local network and draw a preliminary layout that can be further customized and saved.

    26. System Requirements • RAM: minimum - 64MB, recommended minimum - 128MB • OS: Windows 2000/XP (does not work with Windows 95/98/Me) with Administrator permissions • Video: at least 800x600 resolution

    27. Features • Supports various network monitoring tasks from simple ping checks to port probes and service checks. • Individual Link usage monitoring and graphs. • Direct access to remote control tools for device management. • Helps in checking bandwidth to a device or monitor its traffic in real-time.

    28. Features Contd.. • Automatically detects any existing subnets and begins scanning them. • Detected devices are then probed to determine which IP-based services are supported (like NetBIOS, HTTP, FTP, etc.), • Additional probes for any services can also be configured. • After discovery process, the results are plotted as icons on a map grid including which of its services are up, down, or unstable.

    29. Features Contd.. • How long to wait before timing out a device • Which services are polled on which devices • Window layout is stored on the server rather than the client, so everything set up on the server can be viewed from multiple clients.

    30. Features Contd.. • Supports remote Dude server and local clients. • Supports SNMP, ICMP, DNS and TCP monitoring for devices that support it. • Easy installation • Runs on Linux, Mac OS, and Windows. • Best price/value ratio compared to other products (free of charge).

    31. Modes of Operation • Local – to connect to the local Dude server • Remote – to connect insecurely (nothing is encrypted, not even passwords) to a remote Dude server (uses web based interface) • Secure – to connect securely to a remote Dude server (uses web based interface)

    32. Interface Layout

    33. Logs • Debug – shows all changes happening in the system • Action – lists manual operations performed by an administrator (for example, device add/remove events) • Event – stores network events (for example, information about failing services)

    34. Probes • ICMP – regular ping. • TCP – a test, which opens a regular TCP connection to a given port. • DNS – probe the given UDP port (usually, 53) with a valid DNS request for the given domain name. • SNMP – check the specified OID( Object Identifier).

    35. Device properties

    36. Event Log

    37. Web Server Traffic

    38. Local Network Map

    39. Local Network Map (zoom)

    40. Link Speed

    41. Network Segments

    42. Probes

    43. Link Outages

    44. Service Outages

    45. Device Up/Down time

    46. Pros: • Freeware • Lots of customizable options • Useful network mapping features • Separate Client & Server • Uses ftp, http, NetBIOS & ping, SNMP • Export and Import in PNG & PDF format • Email, popup and beep alerts • Secure remote login

    47. Cons: • Rather unintuitive user interface • Device alerts not turned on by default • Minimal and out of date documentation • Web based interface not comprehensive compared to its windows based client

    48. Conclusion • Good Freeware • Cannot work if firewall is enabled. • Separate client and server • No support • Server logout - Dude service closes

    49. References • http://wiki.mikrotik.com/wiki/Dude_usage_notes#Device_Representation • http://www.steveatwal.com/the-dude-free-network-diagramming-tool/ • http://www.smallbusinesscomputing.com/webmaster/article.php/3692871

    50. Q & A