network administration
Download
Skip this Video
Download Presentation
Network Administration

Loading in 2 Seconds...

play fullscreen
1 / 29

Network Administration - PowerPoint PPT Presentation


  • 262 Views
  • Uploaded on

Network Administration. Procedures Tools Ping SNMP Ethereal Graphs http://www.pcworld.com/news/article/0,aid,113175,00.asp 10 commandments for PC security. Procedures. Failure detection Network card locally or at the switch/router Host monitoring Traffic monitoring Route flapping

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Network Administration' - faxon


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
network administration
Network Administration
  • Procedures
  • Tools
    • Ping
    • SNMP
    • Ethereal
    • Graphs
  • http://www.pcworld.com/news/article/0,aid,113175,00.asp
  • 10 commandments for PC security
procedures
Procedures
  • Failure detection
    • Network card locally or at the switch/router
    • Host monitoring
    • Traffic monitoring
    • Route flapping
    • Intrusion
management levels
Management Levels
  • Performance management
    • Utilization and throughput
  • Fault Management
    • What is broken
  • Configuration management
    • Track connections
  • Accounting management
    • Logging resource use
  • Security management
infrastructure
Infrastructure
  • Managing entity
    • Human, network manager at the NOC
  • Managed device
    • Switch, router, interface
  • Management Information Base
    • Network management agent
    • Network management protocol (SNMP)
monitoring protocol
Monitoring Protocol
  • http://www.snmp.org
  • Network Management Objects
    • MIB object
  • Data Definition language
    • Structure of Management Information (SMI)
  • Protocol (SNMP)
  • Security and Administration capabilities
    • Remote control
smi constructs
SMI constructs
  • Data types
    • INTEGER -231 to 231-1
    • Integer32 -231 to 231-1
    • Unsigned32 unsigned version of above
    • OCTET String 16 bit binary or text data
    • OBJECT IDENTIFIER MIB information
    • IPaddress 32 bit internet address
    • Counter32 32 bit counter, wrap around
    • Counter64 64 bit counter, wrap around
    • Gauge32 non wrapping counter
    • TimeTicks 1/100ths of a second since an event
    • Opaque string
mib information
MIB Information
  • Object Identifier tree
mib information8
MIB information
  • Organizes protocol information (RFC 2578,2579,2580)
    • Sorta like the dewey decimal system for network monitoring.
    • Identification strings:
      • sysDescr
      • sysObjectID
      • sysUpTime
      • sysContact
      • sysName
      • sysLocation
      • sysServices
protocol data unit pdu
Protocol Data Unit (PDU)
  • Data string for SNMP information
snmp security
SNMP Security
  • Read Community
    • Read data information from the remote system
  • Write Community
    • Write data to the remote system
  • Trap Community
    • Receive alarm information from the remote system.
snmp security11
SNMP Security
  • Encryption
    • SNMP transfers may be encrypted
  • Authentication
    • Hashed function secret keys
  • Playback protection
    • A hacker can’t hijack the PDU strings
  • Access Control
    • Remote host can limit SNMP access to certain objects
tools at usu
Tools at USU
  • http://statler.usu.edu
  • http://floyd.usu.edu
  • http://pomoxis.usu.edu
  • Interpreting the data
windows administration
Windows Administration
  • User Accounts
  • Group Accounts
  • UPS
  • Fault Tolerance
  • Backups
system administration
System Administration
  • Users
    • Files, Rights, Groups
  • System
    • Security
    • Virus Protection
    • UPS
    • Fault Tolerance
system admin
System Admin
  • Virus Protection
    • Scans incoming data for viruses
    • Scans the disk for trojans or backdoors
    • Must be updated regularly, all versions do this automatically if set up.
    • Beware of back door access to the server
    • Viruses may not slow down the server
    • Viruses may propagate via users address books
slide16
UPS
  • Handles short duration power failures
  • Can alert the operator of power failure
  • Decide how long the UPS needs to power the system
  • Does the server display need to be on?
  • How much power does the server need?
  • Does the UPS have an RS232 control port?
  • Life of the UPS battery(ies)
server admin
Server Admin
  • Fault Tolerance
    • Multiple power supplies
    • Multiple CPU’s
    • Fault Tolerant Disk systems
      • RAID 0 (disk striping)
      • RAID 1 (disk mirroring)
      • RAID 5 (disk striping with parity)
    • BACKUP
server fault tolerance
Server Fault Tolerance
  • Dual Power supplies
    • Power supplies always fail first!
    • If one supply fails the other can take over
  • Dual CPU’s
    • Speed performance
    • The system can operate with only 1 CPU operating
slide19
RAID!
  • RAID 0
    • Disk Striping
    • No fault tolerance
  • RAID 1
    • Disk Mirroring
    • High Disk Overhead (2-2GB disks=2GB)
    • High Write overhead (write to both disks)
more raid
MORE RAID!
  • RAID 5
    • disk striping
    • parity blocks
    • Requires at least 3 disk drives
    • Can improve disk performance
    • lose and replace 1 disk drive and no data is lost
    • overhead is 1/N n=number of disks, 5 10GB disks = 40 GB storage
again backups
Again Backups?
  • Even a fault tolerant disk system can fail
  • Always back up
  • Always have several copies of backups in case one is unreadable
  • Check the backups to see if they are readable
  • Store the tapes or removable media in a safe place
server admin22
Server Admin
  • Watch Event Logs for errors
    • Log files grow rapidly, delete old logs
  • Audit Disk usage and resources
  • Decide when an upgrade is needed
server admin23
Server Admin
  • Monitoring (Task Manager)
  • Resources:
    • Processor
    • Memory
    • Disk
    • Network
  • Baseline
    • To determine what is different week to week
server administration
Server Administration
  • Network
    • File Sharing
    • Printing
    • Mail
file sharing
File Sharing
  • Howto
    • Set up networking, allow sharing
    • Who will access the files?
    • Do they need write access?
    • Is it secure?
      • Beware of instant messaging
printing
Printing
  • Local or remote
  • Shared from PC or networked printer
  • What about security?
  • Gotchas
slide27
Mail
  • Exchange (Microsoft)
    • POP Mail (Post Office Protocol)
      • Downloads messages to the client
    • IMAP Mail (Internet Message Access Protocol)
      • Downloads headers (subject) to the client
      • Better Security
    • SMTP (Simple Mail Transfer Protocol)
      • Sends messages from the client to the Internet
    • Calendaring (collaboration)
slide28
Mail
  • Disk space
  • SPAMMING
  • Relaying
ad