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What is Web Filtering

Do you know what are advanced threats and web filtering?

MicheleWalker
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What is Web Filtering

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  1. Advanced Application and Web Filtering

  2. Common security attacks • Finding a way into the network • Exploiting software bugs, buffer overflows • Denial of Service • TCP hijacking • Packet sniffing • Social problems

  3. Common security attacks • Firewalls • Finding a way into the network • Exploiting software bugs, buffer overflows • Denial of Service • TCP hijacking • Packet sniffing • Social problems • Intrusion Detection Systems Ingress filtering, IDS • IPSec • Encryption (SSH, SSL, HTTPS) • Education

  4. Internet Types of Firewalls • Packet Filtering • Stateful Inspection • Application-Layer Inspection

  5. Application filter and Web Filter • Application filters work with the firewall service in ISA Server to intercept and processnetwork packets as they pass through ISA Server • Application filters examine the application-level • Web filters are used to mediate HTTP, HTTPS, and FTP tunneled

  6. Application Filters • SMTP filter • DNS filter • POP Intrusion Detection filter • SOCKS V4 filter • FTP Access filter • H.323 filter • MMS filter • PNM filter • PPTP filter • RPC filter • RTSP filter

  7. Web Filters • HTTP Security filter • ISA Server Link Translator • Web Proxy filter • SecurID filter • OWA Forms-based Authentication filter

  8. The Web Proxy Filter • The Web Proxy filter allows connections from hosts not configured as Web Proxy clients to be forwarded to the ISA firewall’s Cache and Web Proxy components

  9. Common Attacks Detection and Prevention

  10. DNS Attacks Detection and Prevention • DNS host name overflow • DNS length overflow • DNS zone transfer

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