IPv6 for SMB s: Easy or Hard?

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1 IPv6 for SMB s: Easy or Hard? Jeffrey L Carrell Network Conversions Network Security Consultant 1

2 Agenda IPv6 address Network applications Network utilities Server operating systems Client operating systems Network peripherals Security concerns How to Connect with IPv6 2

3 Do you remember What network protocols you were running in 1990? IPX/SPX Novell AppleTalk Apple NetBIOS/NetBEUI Sytek, IBM, Microsoft DECnet DEC XNS Xerox Others??? What network protocols you were running in 2000? IP (IPv4) IPv6 maybe?? How many of you were involved in the conversion of one or more of these protocols to IP (IPv4)? 3

4 Hexadecimal notation :0000:0000:0A52:0000:0000:0000:3D

5 Shorthand notation Option ::A52:0:0:0:3D16 Consecutive Zeros Leading Zeros 2001:0000:0000:0A52:0000:0000:0000:3D16 Leading Zeros Consecutive Zeros Option :0:0:A52::3D16 5

6 Incorrect shorthand notation 2001:0000:0000:0A52:0000:0000:0000:3D16 Consecutive Zeros Consecutive Zeros Leading Zeros 2001::A52::3D16 How many groups of zeros are missing? 6

7 Mixed URL & IPv6 notation in URL IPv6 Characters URL Characters Enclose IPv6 Address in Square Brackets Optional Port ID 7

8 IPv6 addresses Assigning the interface ID: Autoconfiguration SLAAC (Stateless address autoconfiguration), generally a /64 Stateful Modified IEEE EUI-64 format (RFC 4291) Derived from MAC address Privacy format (RFC 4941) Derived from random number generator generally via DHCPv6 Cryptographically generated (RFC 3972) Secure/unique interface ID Manual configuration 8

9 Interface ID from MAC Company ID Manufacturer Data F 00 IEEE 48-Bit MAC Address FF FE 64 3F 00 Expand to EUI th bit inverted 0xFFFE inserted FF FE 64 3F 00 Invert the Global Bit 0219:71FF:FE64:3F00 Interface ID 9

10 Types of addresses Unicast One-to-one communication Multicast One-to-many communications Anycast Combination use of both Unicast and Multicast Global Internet routable Link-local scope Automatically assigned per interface Loopback/Localhost ::1/128 10

11 Network utilities Ping Trace route Telnet SSH TFTP FTP If using SLAAC link-local address, must specify as: <ipv6-addr>%<zone-id> Ex., ping fe80::20c:29ff:fe04:643b%11 (Win7) Ex., ping fe80::20c:29ff:fe04:643b%<vlan-id> (ProVision) 11

12 Server operating systems Microsoft Server Limited server application support no: AD, DHCPv6, RDP, Exchange, SQL, ftp, Most (if not all) server applications Linux Longest support, generally most server applications 12

13 Client operating systems Microsoft Windows XP w/sp2 - must install IPv6 protocol CLI only configuration Vista & 7 - native and enabled by default GUI and CLI configuration All use RFC3041 privacy addresses by default Apple Mac OS X Mac OS X native and enabled by default GUI and CLI configuration Uses EUI-64 address by default, no DHCPv6 support Linux Generally natively enabled 13

14 Network peripherals Printers VoIP phones Network cameras Embedded systems ** More manufacturers are supporting IPv6 in their devices *** and IPv6 ready or supported does not mean the same thing to everybody!!! 14

15 Security concerns If EUI-64 based address, can determine manufacturer of interface, which may lead to what type of device it is, and where in the network in may be located. Since IPv6 is enabled by default in many operating systems and devices, simple scan of network will provide tons of info Many tools already available for exploitation of devices/systems 15

16 How to Connect with IPv6 Native Many Internet Service Providers have started trials and beta s, 2012 should see increased IPv6 access Tunnel free services available: hurricane electric (he.net) Gogo6/freenet6 (gogo6.com) SixXS (sixxs.com) 16

17 IPv6 Tunnel 17

18 World IPv6 Day System Local services Web mail External services DNS IPv6 Connection Tunnel he.net 18

19 Thank You for Attending! Jeffrey L Carrell Network Security Consultant 21

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