IP based DOS - Chapter 6 IP based Denial of Service (DoS)...

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Zouheir Trabelsi 1 Chapter 6 IP based Denial of Service (DoS) Attacks
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Zouheir Trabelsi 2 Plan IP based DoS attacks
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Zouheir Trabelsi 3 The Internet Layers and Protocols http ftp telnet SMTP Applications Layer TCP UDP Transport Layer IP Network Layer Physical Interface Data Link Layer & Physical Layer ICMP DNS
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Zouheir Trabelsi 4 Ethernet header IP header IP Header +99% of network traffic is IP traffic Few are ARP traffic ICMP, TCP or UDP header Ethernet header ARP header FTP, HTTP…
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Zouheir Trabelsi 5 Moving Data and Sending Commands App Tra Net Phy Data Data http header Data http header TCP header Data http header TCP header IP header Data http header TCP header IP header Eth header Application packet TCP Segment IP Datagram 14 20 20 46-1500 octets Ethernet frame
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Zouheir Trabelsi 6 0 24 8 1 6 31 Type of service Total Length Identification Offset fragment IP Address Source IP Address Destination IP Options 4 VERS HLEN 19 Flags Time To Live (TTL) Protocol Cheksum Padding 32 bits IP Header Format 20 bytes minimum 60 bytes maximum 20 bytes minimum 40 bytes maximum IP header size:
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Zouheir Trabelsi 7 0 24 8 1 6 3 1 Type of service Total Length Identification Offset fragment IP Address Source IP Address Destination IP Options 4 VERS HLEN 19 Flags Time To Live (TTL) Protocol Cheksum Padding 32 bits IP Header Format and Fields Protocol: ICMP: 1 TCP: 6 UDP: 17 Time To Live (TTL): Windows : 128 Unix: 64 Checksum: Correct Incorrect
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Zouheir Trabelsi 8 IP Header Fields VERS : Protocol IP version (version 4) HLEN : Header length in 32 bits, (5 minimum, 15 maximum) Service type : Precedence D T R Not used PRECEDENCE (3 bits) : define the packet priority; today it is not used (congestion problem). 0 (normal priority) to 7 (high) Bits D, T, R : indicate the type of path wanted by the packet, allow a
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This note was uploaded on 03/26/2010 for the course SECB 455 taught by Professor Zuhairtrabelsi during the Spring '10 term at United Arab Emirates University.

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IP based DOS - Chapter 6 IP based Denial of Service (DoS)...

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