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Crosby-Signed Thesis - Alliance Digital Repository

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IMPACT OF IPV6 TRANSITION MECHANISMS ON THE NETWORK FORENSIC<br />

125<br />

Windows<br />

Linux/BSD/UNIX<br />

Run ipconfig<br />

Run ifconfig<br />

yes<br />

Multiple address<br />

yes<br />

6to4 with<br />

privacy extensions<br />

Interface<br />

has IPv4 Internet<br />

connectivity<br />

no<br />

yes<br />

Evaluate assigned<br />

addreses<br />

IPv6<br />

address with<br />

2002<br />

prefix<br />

no<br />

IPv6<br />

address with<br />

FE8<br />

prefix<br />

yes<br />

no<br />

6to4<br />

Link-local<br />

Run whois query on<br />

global IPv6 address<br />

no<br />

Other<br />

IPv6 prefixs<br />

yes<br />

Dual-stack IPv6 or<br />

another mechanism<br />

no<br />

IPv6 not Installed<br />

on the interface<br />

2001:0<br />

prefix and<br />

results indicate<br />

IANA Reserved<br />

Block<br />

no<br />

Result<br />

indicates known<br />

Tunnel-Broker<br />

provider<br />

yes<br />

yes<br />

Teredo<br />

Tunnel-Broker<br />

no<br />

Evaluate Installed<br />

programs<br />

Tunnel-Broker<br />

software created<br />

interface<br />

no<br />

yes<br />

Result = node<br />

IPv4 address<br />

no<br />

yes<br />

IPv6<br />

address with<br />

FE8<br />

prefix<br />

yes<br />

ISATAP<br />

Link-local<br />

Convert last 4 octets<br />

of IPv6 address to<br />

decimal (IPv4 address)<br />

no<br />

Dual-stack or<br />

another mechanism<br />

Figure 8. IPv6 Transition Mechanism State Determination in Win, Linux, BSD, and UNIX<br />

Network traces analysis.<br />

Accurate network trace analysis depends on understanding if traffic has flowed through<br />

an IPv6 transition mechanism. The proposed process flow methodology is illustrated in Figure 9.

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