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Securing School Networks: Firewall and Filtering Solutions for Enhanced Broadband Safety

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This presentation by Liam Kennedy, Network Engineer at HEAnet Ltd., outlines the comprehensive measures taken to secure broadband infrastructure in nearly 4,000 schools. Funded by €18m from TIF and Departments of Education and Communication, the project includes the implementation of advanced firewalls, web filtering, and malware scanning. With a peak daily traffic exceeding 100 Mbps and 84% of schools actively utilizing their connections, this initiative ensures robust cybersecurity, enabling a safe learning environment for students while minimizing risks associated with internet use.

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Securing School Networks: Firewall and Filtering Solutions for Enhanced Broadband Safety

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  1. SecuringSchools Firewalling and Filtering on the Broadband for Schools Network. Liam Kennedy Network Engineer HEAnet Ltd.

  2. Broadband for Schools Project • Providing free broadband to nearly 4,000 schools. • €18m - Funded by TIF and Depts. of Education and Communication. • Feb 2004: Plan announced and HEAnet chosen as ISP. • Late 2004: Connection and router tenders awarded. • Spring 2005: HEAnet build network and interconnect with selected service providers. NCTE support desk set up. • Summer 2005 Majority of schools connected and routers installed – Spring 2006: • Summer 2006: Scoilnet email service trialled and put into production.

  3. Service providers

  4. Schools Update • 95% of schools installed • 84% of schools have used their connection • Peak daily Traffic > 100Mbps • Daily Download > 250GB • Email service now live

  5. 3 layers of security

  6. Cisco Firewall Services Module • Integrated firewall module (blade) for 6500 switch • 5.5 Gbps throughput • 100,000 connections per second • 1 million concurrent connections • Runs PIX OS

  7. Firewall Inbound

  8. Firewall Outbound

  9. Fortinet • 500Mbps in-line scanning – scalable to higher bandwidths • Web Content Filtering • Virus & Malware Scanning – HTTP, SMTP, POP3 • Anti-Spam • IPS • Logging and statistics

  10. Fortinet: Web Filtering • Database of 26 million rated Web Sites • 76 Categories • 24x7 Managed Service • White & Blacklists – override categories • Unrated sites blocked (24hr rating) • Currently 2 levels of filtering but is capable of giving each school it’s own profile

  11. Web filtering – potential problems Not everything on the web can be neatly categorized - manual intervention will always be required.

  12. Anti-Virus • Well-known ports blocked inbound and outbound by FWSM and 871 • HTTP, SMTP, POP3, IMAP scanned by Fortinet • Automatic reporting culled from Cymru and Spamcop reports, DNS and Fortinet logs. • Schools contacted – problem hosts can be blacklisted.

  13. VPN

  14. VPN

  15. VPN

  16. Other Issues: • Scoilnet Email Service • Virus and Spam scanned, inbound and outbound • P2P and other bandwidth-intensive apps • Can be blocked or rate-limited • Acceptable Usage

  17. Q&A • liam.kennedy@heanet.ie • www.ncte.ie • www.fortinet.com

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