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Security in Linux Systems: Hands-on

Key Information

  • Level: Advanced (Level 3)
  • Duration: 4 Day Course
  • Delivery: Instructor led with attendee workshops
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Familiarity with the operation of basic IP networks is assumed, and familiarity with basic administrative operations on UNIX/Linux is useful

Outline and Objectives:

Businesses of all sizes are adopting one of the various distributions of Linux as key elements in their networking and telecommunications strategy. The Linux kernel at release 2.6 includes powerful options for controlling access using Security-Enhanced Linux (SELinux) in addition to conventional system hardening techniques. The Iptables/netfilter firewall allows access control and powerful filtering of packets. This course takes attendees through all stages of installing, configuring, testing and operating both of these powerful packages, using a sophisticated classroom network.

Who Should Attend:

This course is aimed at IT staff, cross-training engineers, operations staff, and anyone who needs to understand the principles and practices of implementing highly secure Linux systems. The course involves extensive hands-on exercises for attendees throughout its duration.

Course Contents:

  • Techniques Used by Attackers
  • Vulnerabilities and Testing Tools
  • Configuration of SELinux Using Defaults
  • Defined Users and Customised Policies
  • SELinux Configuration Tools
  • Iptables/netfilter as a Stateful Packet Inspection Filter
  • Features and Syntax of Iptables
  • Building a Standalone Basic Firewall
  • Control of Well-Known TCP Services: Telnet, SSH, FTP, HTTP,HTPPS
  • Control of UDP-based Services: SMTP, DHCP, SMTP, DNS
  • Control of ICMP and DoS Prevention
  • NAT/NAPT Capabilities of Iptables/netfilter
  • Troubleshooting Firewall Rules

What customers say...

"(Instructor) knowledge excellent, and everyone had fun"

JP, Ascom Wireless Services

"Very informative, and able to build on knowledge gained"

KM, Ascom Wireless Services

"Instructor really made a technical subject understandable..."

MT, UK Government

"...very interesting, useful and informative."

PS, Intelsat

"It was a very revealing session. It delivered perfectly on my expectations"

BD, DDB Lagos

" we received from colleagues was very positive: instructor, quality, materials, content and facilities. Thank you..."

VC, Hewlett Packard

"...Thank you, excellent presentation of course..."

LK, Ericsson

"...presenter had excellent knowledge..."

PD, TalkTalk

" excellent instructor..."

DR, BT Group

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AL, UK Government

"...really informative..."

KA, Dimension Data

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PK, Vodafone Group

"Really great, thanks very much"

IW, Cable and Wireless

"Instructor could answer any question...would gladly recommend strongly"

MT, UK Government

"...the NGOSS course was a complete sucess...thank you..."

RG, Hewlett Packard

"...a huge knowledge of the subject, and explains things superbly..."

SR, Ericsson

"....excellent overview of all the technologies."

MM, Siemens

"A good start to understanding the NGOSS framework"


"Very knowledgeable"

CH, UK Government

"Very knowledgeable...have learnt much more than I expected..."

DH, UK Government

"Very interesting, and instructor happy to adapt to my needs. Thank you"

PL, Digitalk

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ND, Commonwealth Telecommunications Organisation

" to customise to our requirements in short order....very impressed..."

KP, Central Government

"CD really helpful"

DH, UK Government

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SG, Home Group

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PM, Orange

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YD, Virgin Media

"...knew his subject in depth, with technical knowledge to add..."

GD, Smith Barney

"Nice and informative introductory course"

CO, MTN Nigeria

"...excellent instructor!"

TR, Ericsson Services Limited

"Really useful! Helped to meet my work objectives"

KP, Virgin Media

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