Secure your IT infrastructure  with GNU/Linux
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Secure your IT infrastructure with GNU/Linux

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I first did this presentation way back in 2006 during foss enterprise event organized in Colombo.

I first did this presentation way back in 2006 during foss enterprise event organized in Colombo.

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Secure your IT infrastructure with GNU/Linux Presentation Transcript

  • 1. Secure your IT infrastructure with GNU/Linux By Buddhika Siddhisena Chief Technology Officer & Co-Founder's of ThinkCube Systems & Member's of LKLUG 1
  • 2. Strategy ● Migrate Core services ● Migrating other services ● Desktop replacements 2
  • 3. Core services ● Email ● Web site ● Proxy ● File sharing ● Printer sharing 3
  • 4. Email Server ● Email Server Software – Sendmail is the most popular – Postfix and Exim are other popular ones ● Email Authentication – Unix account authentication – MySQL authentication – LDAP authentication 4
  • 5. Email Clients ● Any client which supports SMTP/IMAP/POP ● Web mail – OpenWebMail (perl) – Horde (php) – Zimbra (java) 5
  • 6. Email + Virus + Spam ● SPAM detection – Spam Assassin (rule based) – Dspam (statistical) ● Virus scanners – ClamAV ● Virus to Mail server interfaces – Amavis – MailScanner 6
  • 7. Web & Proxy ● Recommended Web server is Apache 2.x ● Recommended Proxy server is SQUID ● SQUID to virus scanner interfaces – Squirm – Squidguard – squidcalm 7
  • 8. File Shares ● File sharing – SAMBA, implements the SMB/NMB protocols – WebDAV, uses apache to upload/download files – SFTP/SCP, Secure FTP or Secure Copy. Part of OpenSSH 8
  • 9. Printer Sharing ● CUPS (Common Unix Printing System) – Implements IPP (Internet Printing Protocol) – SAMBA can be configured to share printers ● Printer Drivers – Foomatic drivers – GIMP Print Drivers 9
  • 10. Other services ● Firewalls ● Windows PDC/AD ● Databases ● VOIP/FAX ● Network monitoring 10
  • 11. Firewalls ● Linux already has a built in firewall called IPTables ● SELinux for application level security 11
  • 12. PDC/BDC/AD ● SAMBA can be configured for all of these scenarios. ● OpenLDAP or Fedora Directory can be used to implement directory services. 12
  • 13. Databases ● MySQL is a much better replacement for MS Access or MSSQL. ● PostgreSQL can replace Oracle & MSSQL. 13
  • 14. VOIP/FAX ● Asterisk is a popular SIP based VOIP server. – Peer-to-peer calls via a VOIP phone. – Conferencing support – Interface with PSTN lines and provide PBX functionality ● HylaFAX is a popular FAX server. 14
  • 15. Net Monitor ● LAN monitoring tools. – netcat. – Ntop ● Log Analyzers – Webalizer (http,squid etc.) – Awstats (http,squid,mail etc.) 15
  • 16. Desktop Replacements ● Replace IE with Firefox ● Replacing Microsoft Office with OpenOffice.org ● Replace Outlook with Thunderbird for simple email functionality ● Replace Photoshop with Gimp ● Replace Corel Draw with Inkscape 16
  • 17. Which Distribution ● If you want to run a Server... – Redhat AS (Commercial) – SuSE Enterprise (Commercial) – CentOS (Redhat AS compatible) – Debian Stable/Testing – Ubuntu Server 17
  • 18. Which Distribution ● If you want to run a desktop client... – Ubuntu (Gnome based) – Kubuntu (Kde based) – Fedora – Open SUSE – Debian Testing/Unstable 18
  • 19. Software Wars 19
  • 20. Thank You 20