Netværkssikkerhed

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IPv6 kontra IPv4 • Flere og mere hierarkiske netværksadresser —128 bits adressefelt —3,4×1038 adresser —eller ca. 5×1028 (~295 ) adresser for hver af de ca. 6,5 milliarder folk i 2006 • Bedre understøttelse af tidskritiske applikationer —prioriteter (0-15) og virtuel kredsløb (Flow kontrol) • Forberedt for IPSEC (sikkerhed) • Mere effektiv routing (simpel header) • One or more extension headers frame ip x x tcp data 09/10/2012 ITU 7.38
IPSEC (IP-security) • Kan både anvendes med IPv4 og IPv6 • Access control • Connectionless integrity (per packet) • data origin authentication • confidentiality • Protection against • replay • trafic analysis • DoS 09/10/2012 ITU 7.39
Page 1 and 2: Netværkssikkerhed Netv rkssikkerhe
Page 3 and 4: Netværksterminologi Computing syst
Page 5 and 6: Transmissionsmedier • Kobber (wir
Page 7 and 8: ping application ICMP IGMP DHCP TCP
Page 9 and 10: Applikationslaget HELO itu.dk MAIL
Page 11 and 12: UDP-header Connection less Transpor
Page 13 and 14: IP - Netværkslaget • Notation 19
Page 15 and 16: LAN Header Transceiver Frames Netwo
Page 17 and 18: Trusler og sårbarheder • Sniffin
Page 19 and 20: Mulige modmidler • Boundary Contr
Page 21 and 22: IEEE 802.1q 12 bits til VLAN, dvs,
Page 23 and 24: Firewall komponenter • Sikkerheds
Page 25 and 26: Felter for filtrering (TCP/IP) TYPI
Page 27 and 28: Packet filtering firewall system
Page 29 and 30: Screened subnet firewall system 09/
Page 31 and 32: Personal firewalls • Installeres
Page 33 and 34: Dual home firewall iptables - eksem
Page 35 and 36: Intrusion detection systemer (IDS)
Page 37: TCP/IP suite Application layer Tran
Page 41 and 42: IPSEC headers • Authentication He
Page 43 and 44: Transport mode AH in IP Tunnel mode
Page 45 and 46: • ISAKMP Key distribution (Intern

Netværkssikkerhed

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