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pfSense
                                    soluzione firewall opensource




                                              Michele Della Marina
                                                       Dario Tion
                                                           Settembre, 2012




Michele Della Marina - Dario Tion                          pfSense - soluzione firewall opensource
pfSense
                                            soluzione firewall opensource




                                     1969: nasce Internet
                               “TRUST” FRA I COMPUTER IN RETE




Michele Della Marina - Dario Tion                                  pfSense - soluzione firewall opensource
pfSense
                                               soluzione firewall opensource


                                    1988: Robert Tappan Morris WORM




                                                            Vulnerabilita’ UNIX
                                                                  DDOS
                                                      6000? 60000? computer infettati

Michele Della Marina - Dario Tion                                      pfSense - soluzione firewall opensource
pfSense
                                    soluzione firewall opensource

                                      Secondo una statistica redatta nel 2010
                                        gli attacchi informatici hanno colpito
                                     circa il 75% dei business di tutto il mondo




                                               MEGLIO PROTEGGERCI




Michele Della Marina - Dario Tion                               pfSense - soluzione firewall opensource
pfSense
                                    soluzione firewall opensource




                                           ARCHITETTURA TIPICA: 2 ZONE




                                                     WAN: zona pubblica
                                                        (untrusted)

                                                      LAN: zona privata
                                                          (trusted)


Michele Della Marina - Dario Tion                          pfSense - soluzione firewall opensource
pfSense
                                    soluzione firewall opensource



                                        ARCHITETTURA TIPICA: 3 ZONE




                                                 Pubblicazione servizi
                                                DMZ: zona demilitarizzata

Michele Della Marina - Dario Tion                          pfSense - soluzione firewall opensource
pfSense
                                          soluzione firewall opensource




       PILA ISO/OSI

                                    Open Systems Interconnection
                                     Architettura logica della rete

Michele Della Marina - Dario Tion                                pfSense - soluzione firewall opensource
pfSense
                                    soluzione firewall opensource




         INCAPSULAMENTO




Michele Della Marina - Dario Tion                          pfSense - soluzione firewall opensource
pfSense
                                              soluzione firewall opensource


                                    COME E' FATTO UN PACCHETTO




Michele Della Marina - Dario Tion                                    pfSense - soluzione firewall opensource
pfSense
                                             soluzione firewall opensource

                                    ANALISI DI RETE: WIRESHARK




Michele Della Marina - Dario Tion                                   pfSense - soluzione firewall opensource
pfSense
                                    soluzione firewall opensource




Michele Della Marina - Dario Tion                          pfSense - soluzione firewall opensource
pfSense
                                    soluzione firewall opensource




                                                   FIREWALL “terza generazione”
                                                   application filter


                                             FIREWALL “seconda generazione”
                                             stateful filter
                                         FIREWALL “prima generazione”
                                         packet filter




            PILA ISO/OSI



Michele Della Marina - Dario Tion                          pfSense - soluzione firewall opensource
pfSense
                                            soluzione firewall opensource



                                    PACKET FILTER FIREWALL




Michele Della Marina - Dario Tion                                  pfSense - soluzione firewall opensource
pfSense
                                       soluzione firewall opensource


                                    REJECT or BLOCK




Michele Della Marina - Dario Tion                             pfSense - soluzione firewall opensource
pfSense
                                            soluzione firewall opensource


                                    STATEFUL FILTER FIREWALL




Michele Della Marina - Dario Tion                                  pfSense - soluzione firewall opensource
pfSense
                                             soluzione firewall opensource

                                    STATEFUL FIREWALL RULES




           - Rule
           - Top->Bottom
           - Default Policy
           - Allow Back




Michele Della Marina - Dario Tion                                   pfSense - soluzione firewall opensource
pfSense
                                           soluzione firewall opensource


                                    APPLICATION FIREWALL




                                                     PORTA
                                                     80,443
                                                                          INTERNET




Michele Della Marina - Dario Tion                                 pfSense - soluzione firewall opensource
pfSense
                                           soluzione firewall opensource


                                    APPLICATION FIREWALL




Michele Della Marina - Dario Tion                                 pfSense - soluzione firewall opensource
pfSense
                                          soluzione firewall opensource



                                    FIREWALL FEATURES




- VLAN
- ROUTING
- NAT
- VPN
- QOS / BANDWIDTH MANAGEMENT




Michele Della Marina - Dario Tion                                pfSense - soluzione firewall opensource
pfSense
                                        soluzione firewall opensource

                           VLAN: VIRTUAL LOCAL AREA NETWORK




   1 Switch
   N Segmenti di rete


  - domini di broadcast
  - “sicurezza”
  - ottimo controllo e gestione




Michele Della Marina - Dario Tion                              pfSense - soluzione firewall opensource
pfSense
                                                    soluzione firewall opensource

                                    FIREWALL FEATURES: ROUTING


                                                              Permette la
                                      Livello 3 ISO/OSI   comunicazione fra reti
                                                                diverse

                                                       Routing
                                                  statico/dinamico




Michele Della Marina - Dario Tion                                           pfSense - soluzione firewall opensource
pfSense
                                                      soluzione firewall opensource

                                         FIREWALL FEATURES: NAT/NAPT
                                           Network Address Translation
                         PRO                                                           CONTRO
           risolve carenza indirizzi IPv4                         Si perde la possibilità di fare tracciamenti end-to-end
Non è necessario cambiare gli indirizzi della rete                    Alcune applicazioni possono non funzionare
       privata per accedere ad Internet.
                                                                   E’ un lavoro aggiuntivo per la CPU dei router che lo
Sicurezza, il traffico entrante non può raggiungere                                  implementano
              gli host sulla rete privata




     Michele Della Marina - Dario Tion                                             pfSense - soluzione firewall opensource
pfSense
                                                 soluzione firewall opensource

                                    FIREWALL FEATURES: VPN
                                      Virtual Private Network




                                    Tunnel protetto nella rete pubblica



                                                       site 2 site
                                                       client 2 site




Michele Della Marina - Dario Tion                                       pfSense - soluzione firewall opensource
pfSense
                                    soluzione firewall opensource


   FIREWALL FEATURES: QOS / BANDWIDTH MANAGEMENT




                                            Gestione intelligente della banda




Michele Della Marina - Dario Tion                          pfSense - soluzione firewall opensource
pfSense
                                             soluzione firewall opensource


                                    FIREWALL: NON SOLO FIREWALL



       RADIUS SERVER
       DHCP SERVER
       LDAP SERVER
       ANTIVIRUS
       ANTISPAM
       SUPPORTO VLAN




Michele Della Marina - Dario Tion                                   pfSense - soluzione firewall opensource
pfSense
                                                       soluzione firewall opensource
                                                    GESTIONE LOG

                  Chi segnala un attacco?




                   osservatorio attacchi italiano




                                                                 - gestione mirata dei log
                                                                 - allarmi automatici
                                                                 - archiviazione protetta
Michele Della Marina - Dario Tion                                             pfSense - soluzione firewall opensource
pfSense
                                     soluzione firewall opensource

            FIREWALL COMMERCIALI – FIREWALL OPENSOURCE




- alte performance (ASIC dedicati)                 - efficienti e “gratis”
- black box “già pronte”                           - flessibili da “personalizzare”
- features integrate                               - aperti a nuovi moduli
- supporto del vendor                              - comunità attive


Michele Della Marina - Dario Tion                            pfSense - soluzione firewall opensource
pfSense
                                             soluzione firewall opensource

                                    EQUIPAGGIAMENTO FIREWALL

Interfacce (rame, fibra, 10/100/1000)
Management (web,cli,console)
Stateful Throughput
DPI Throughput
Numero connessioni supportate
HA
IPV6




Michele Della Marina - Dario Tion                                   pfSense - soluzione firewall opensource
pfSense
                                                   soluzione firewall opensource


                                            SUGGERIMENTI
                - Dove collocarlo? (censimento host/servizi, topologia, routing)

                - Come collocarlo? (transparent/routed firewall?)

                - Throughput: banda a disposizione (WAN e LAN)?

                - Chi gestisce il firewall? Appliance vs OpenSource? Assistenza?

                - Obiettivi: Filtrare applicazioni? Semplice protezione IPS/IDS? VPN?

                - All deny rules? (permetto solo le regole necessarie)

                - ATTENZIONE: attacchi dall'interno/social engineering

                - LOG: storico? Strumenti per veloce ricerca di informazioni?

                - ATTENZIONE: default configuration e default password

                - Piattaforme supportate? Management? VPN Client?

                - HA: ambiente critico?

Michele Della Marina - Dario Tion                                                  pfSense - soluzione firewall opensource
pfSense
                                      soluzione firewall opensource


                                    RIFERIMENTI




Michele Della Marina - Dario Tion                            pfSense - soluzione firewall opensource
pfSense
                                                soluzione firewall opensource

                                           RIFERIMENTI

                                    BIBLIOGRAFIA ed IMMAGINI
           Famiglia Simpson :-)
           http://en.wikipedia.org/wiki/Morris_worm
           http://en.wikipedia.org/wiki/Firewall_(computing)#cite_note-report_unm-2

           www.symantec.com
           www.malaboadvisoring.it
           www.google.com
           www.vmware.com
           www.laontalk.com
           www.guidaacquisti.net/
           www.wikimedia.org
           www.39italia.com
           it.123rf.com/
           www.silhouettesclipart.com
           www.thenetworkthinkers.com/
           www.neomedia.it
           www.diablotin.com
           www.wired.com
           www.cisco.com

Michele Della Marina - Dario Tion                                             pfSense - soluzione firewall opensource

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Seminario Ditedi pfSense - parte 1

  • 1. pfSense soluzione firewall opensource Michele Della Marina Dario Tion Settembre, 2012 Michele Della Marina - Dario Tion pfSense - soluzione firewall opensource
  • 2. pfSense soluzione firewall opensource 1969: nasce Internet “TRUST” FRA I COMPUTER IN RETE Michele Della Marina - Dario Tion pfSense - soluzione firewall opensource
  • 3. pfSense soluzione firewall opensource 1988: Robert Tappan Morris WORM Vulnerabilita’ UNIX DDOS 6000? 60000? computer infettati Michele Della Marina - Dario Tion pfSense - soluzione firewall opensource
  • 4. pfSense soluzione firewall opensource Secondo una statistica redatta nel 2010 gli attacchi informatici hanno colpito circa il 75% dei business di tutto il mondo MEGLIO PROTEGGERCI Michele Della Marina - Dario Tion pfSense - soluzione firewall opensource
  • 5. pfSense soluzione firewall opensource ARCHITETTURA TIPICA: 2 ZONE WAN: zona pubblica (untrusted) LAN: zona privata (trusted) Michele Della Marina - Dario Tion pfSense - soluzione firewall opensource
  • 6. pfSense soluzione firewall opensource ARCHITETTURA TIPICA: 3 ZONE Pubblicazione servizi DMZ: zona demilitarizzata Michele Della Marina - Dario Tion pfSense - soluzione firewall opensource
  • 7. pfSense soluzione firewall opensource PILA ISO/OSI Open Systems Interconnection Architettura logica della rete Michele Della Marina - Dario Tion pfSense - soluzione firewall opensource
  • 8. pfSense soluzione firewall opensource INCAPSULAMENTO Michele Della Marina - Dario Tion pfSense - soluzione firewall opensource
  • 9. pfSense soluzione firewall opensource COME E' FATTO UN PACCHETTO Michele Della Marina - Dario Tion pfSense - soluzione firewall opensource
  • 10. pfSense soluzione firewall opensource ANALISI DI RETE: WIRESHARK Michele Della Marina - Dario Tion pfSense - soluzione firewall opensource
  • 11. pfSense soluzione firewall opensource Michele Della Marina - Dario Tion pfSense - soluzione firewall opensource
  • 12. pfSense soluzione firewall opensource FIREWALL “terza generazione” application filter FIREWALL “seconda generazione” stateful filter FIREWALL “prima generazione” packet filter PILA ISO/OSI Michele Della Marina - Dario Tion pfSense - soluzione firewall opensource
  • 13. pfSense soluzione firewall opensource PACKET FILTER FIREWALL Michele Della Marina - Dario Tion pfSense - soluzione firewall opensource
  • 14. pfSense soluzione firewall opensource REJECT or BLOCK Michele Della Marina - Dario Tion pfSense - soluzione firewall opensource
  • 15. pfSense soluzione firewall opensource STATEFUL FILTER FIREWALL Michele Della Marina - Dario Tion pfSense - soluzione firewall opensource
  • 16. pfSense soluzione firewall opensource STATEFUL FIREWALL RULES - Rule - Top->Bottom - Default Policy - Allow Back Michele Della Marina - Dario Tion pfSense - soluzione firewall opensource
  • 17. pfSense soluzione firewall opensource APPLICATION FIREWALL PORTA 80,443 INTERNET Michele Della Marina - Dario Tion pfSense - soluzione firewall opensource
  • 18. pfSense soluzione firewall opensource APPLICATION FIREWALL Michele Della Marina - Dario Tion pfSense - soluzione firewall opensource
  • 19. pfSense soluzione firewall opensource FIREWALL FEATURES - VLAN - ROUTING - NAT - VPN - QOS / BANDWIDTH MANAGEMENT Michele Della Marina - Dario Tion pfSense - soluzione firewall opensource
  • 20. pfSense soluzione firewall opensource VLAN: VIRTUAL LOCAL AREA NETWORK 1 Switch N Segmenti di rete - domini di broadcast - “sicurezza” - ottimo controllo e gestione Michele Della Marina - Dario Tion pfSense - soluzione firewall opensource
  • 21. pfSense soluzione firewall opensource FIREWALL FEATURES: ROUTING Permette la Livello 3 ISO/OSI comunicazione fra reti diverse Routing statico/dinamico Michele Della Marina - Dario Tion pfSense - soluzione firewall opensource
  • 22. pfSense soluzione firewall opensource FIREWALL FEATURES: NAT/NAPT Network Address Translation PRO CONTRO risolve carenza indirizzi IPv4 Si perde la possibilità di fare tracciamenti end-to-end Non è necessario cambiare gli indirizzi della rete Alcune applicazioni possono non funzionare privata per accedere ad Internet. E’ un lavoro aggiuntivo per la CPU dei router che lo Sicurezza, il traffico entrante non può raggiungere implementano gli host sulla rete privata Michele Della Marina - Dario Tion pfSense - soluzione firewall opensource
  • 23. pfSense soluzione firewall opensource FIREWALL FEATURES: VPN Virtual Private Network Tunnel protetto nella rete pubblica site 2 site client 2 site Michele Della Marina - Dario Tion pfSense - soluzione firewall opensource
  • 24. pfSense soluzione firewall opensource FIREWALL FEATURES: QOS / BANDWIDTH MANAGEMENT Gestione intelligente della banda Michele Della Marina - Dario Tion pfSense - soluzione firewall opensource
  • 25. pfSense soluzione firewall opensource FIREWALL: NON SOLO FIREWALL RADIUS SERVER DHCP SERVER LDAP SERVER ANTIVIRUS ANTISPAM SUPPORTO VLAN Michele Della Marina - Dario Tion pfSense - soluzione firewall opensource
  • 26. pfSense soluzione firewall opensource GESTIONE LOG Chi segnala un attacco? osservatorio attacchi italiano - gestione mirata dei log - allarmi automatici - archiviazione protetta Michele Della Marina - Dario Tion pfSense - soluzione firewall opensource
  • 27. pfSense soluzione firewall opensource FIREWALL COMMERCIALI – FIREWALL OPENSOURCE - alte performance (ASIC dedicati) - efficienti e “gratis” - black box “già pronte” - flessibili da “personalizzare” - features integrate - aperti a nuovi moduli - supporto del vendor - comunità attive Michele Della Marina - Dario Tion pfSense - soluzione firewall opensource
  • 28. pfSense soluzione firewall opensource EQUIPAGGIAMENTO FIREWALL Interfacce (rame, fibra, 10/100/1000) Management (web,cli,console) Stateful Throughput DPI Throughput Numero connessioni supportate HA IPV6 Michele Della Marina - Dario Tion pfSense - soluzione firewall opensource
  • 29. pfSense soluzione firewall opensource SUGGERIMENTI - Dove collocarlo? (censimento host/servizi, topologia, routing) - Come collocarlo? (transparent/routed firewall?) - Throughput: banda a disposizione (WAN e LAN)? - Chi gestisce il firewall? Appliance vs OpenSource? Assistenza? - Obiettivi: Filtrare applicazioni? Semplice protezione IPS/IDS? VPN? - All deny rules? (permetto solo le regole necessarie) - ATTENZIONE: attacchi dall'interno/social engineering - LOG: storico? Strumenti per veloce ricerca di informazioni? - ATTENZIONE: default configuration e default password - Piattaforme supportate? Management? VPN Client? - HA: ambiente critico? Michele Della Marina - Dario Tion pfSense - soluzione firewall opensource
  • 30. pfSense soluzione firewall opensource RIFERIMENTI Michele Della Marina - Dario Tion pfSense - soluzione firewall opensource
  • 31. pfSense soluzione firewall opensource RIFERIMENTI BIBLIOGRAFIA ed IMMAGINI Famiglia Simpson :-) http://en.wikipedia.org/wiki/Morris_worm http://en.wikipedia.org/wiki/Firewall_(computing)#cite_note-report_unm-2 www.symantec.com www.malaboadvisoring.it www.google.com www.vmware.com www.laontalk.com www.guidaacquisti.net/ www.wikimedia.org www.39italia.com it.123rf.com/ www.silhouettesclipart.com www.thenetworkthinkers.com/ www.neomedia.it www.diablotin.com www.wired.com www.cisco.com Michele Della Marina - Dario Tion pfSense - soluzione firewall opensource