Spam Email and Bandwidth Monitoring

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Spam Email and Bandwidth Monitoring
Catherine Musyimi cmusyimi_at_strathmore.edu

• Strathmore University www.strathmore.edu
• Nairobi - Kenya

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Overview

• The network consist of 2 domains, Staff(400 pcs)
  and students (600pcs).
• Internet connection is through a fibre connection
  of uplink-512kbps and 2mbps downlink.
• It is a switched environment with routing at the
  core.
• It is a windows environment, Periphery computers
  are Linux boxes.

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Strathmore University

• Exchange 2000 on windows 2000 server, xp clients
  running outlook with Norton.
• Linux Servers
• Sendmail
• MailScanner Mailwatch
• Spamassassin
• ClamAV
• MRTG Bandwidth Monitoring and graphing tool
• rc.firewall
• Optenet/squid

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Mailscanner What is it?

• It is an e-mail security system deployed on your
  e-mail gateways.
• It captures every known virus passing through
  your e-mail servers and identifies over 95 of
  all the spam in our email gateway.

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How is email processed?
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Output - Mailwatch
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Output - Mailwatch
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Output - Mailwatch
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Lists

• http//spamassassin.apache.org/tests_3_0_x.html
• Identified spam
• Subject line is tagged so users can filter
• easily
• Message may be tagged, delivered, deleted,
  archived, bounced, encapsulated, notified and/or
  stripped to plain text

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VIRUSES

• Scans all e-mail passing through it for viruses
  using any combination of the supported anti-virus
  engines
• ClamAV is free
• Attachments containing viruses or other security
  problems are removed
• All safe content is delivered untouched
• Recipients and senders may get a warning
  explaining what happened and who they should
  contact for help
• System admin notified of basic details of message
  and what viruses were found

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MRTG RRDTOOL
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MRTG RRDTOOL
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• Thanks Questions?