- #How to convert mac address to ip6 address driver
- #How to convert mac address to ip6 address 64 bits
- #How to convert mac address to ip6 address mac
These shortcomings have been known for a long time, and the Modified EUI-64 format's deprecation has already been discussed. Notably, if you know a network's chosen vendor, and you know fixed pattern of FF:FE, you only have 24 bits left to scan. On the other hand, the pattern allows an attacker to reduce the search space for scanning: Two bytes are fixed and thus reduce the address space an adversary is able to further reduce the search space when looking for distinct types of devices. On the one hand, this means that a sniffed address allows to gain details on the respective device type (for example, to tailor a successive tailored attack).
#How to convert mac address to ip6 address mac
MAC addresses contain the Organisationally Unique Identifier (OUI) identifying the device manufacturer. Further, analysing the collected network prefixes enables the adversary to trace a host's movement in the network, and is of particular interest for mobile hosts like smart phones or tablets. This way, an adversary is able to attribute Internet transactions from multiple vantage points to a single node, and gain an in-depth understanding of the latter's Internet behaviour. Including a globally unique identifier like the MAC address in the IIDs has multiple consequences on security and privacy of a node:Īll addresses used by a node in any network it connects to will have the same IID in the bottom 64 bits, and thus enable address correlation by solely comparing the IIDs. The Modified EUI-64 format represents the oldest of such formats. A host forms the IID for an interface from the interface's MAC address, essentially by inserting a fixed pattern of two bytes as shown in Figure 1. The Modified EUI-64 Format is inferred from the MAC address by inserting a fixed pattern of two bytes. For information on IPv6 address planning see this recent post on Labs.įigure 1: IPv6 Addresses containing the Network Prefix and the Interface Identifier.
#How to convert mac address to ip6 address 64 bits
Note that here we'll discuss the interface identifier - the lower 64 bits - and not issues related to address planning and/or assignment of prefixes to hosts.
Here, we'll elaborate on existing formats, highlighting their advantages and disadvantages with respect to security and privacy. The IPv6 address format chosen by a host or a network operator has significant impact on how well a node is protected against malicious actions by adversaries. More bits for addressing are a curse and a saviour at the same time: on the one hand, more address space provides more flexible addressing, but could also lead to information leakage.
This article discusses the impact of IPv6 addressing on security and privacy, how diverse address formats deal with these matters, and outlines shortcomings in today's addressing mechanisms. IPv6 has led to new aspects in addressing, also with regard to security and privacy. In IPv6, addresses have been increased to a total length of 128 bit usually considered in two 64-bit halves: the first 64 bits are the network prefix, dependent on a host's location in the network, and the latter 64 bits are the interface identifier (IID) that enables a subscriber's identification on the local link.
#How to convert mac address to ip6 address driver
The principle driver for this new Internet Protocol version is its predecessor's shortage of addresses.
IPv6 adoption is ongoing according to Google's statistics, between 17.5% and 21.4% of their web traffic is served over IPv6, though IPv6 usage varies significantly among different countries.
0 kommentar(er)
