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1.0 IPv6 Information
2.0 IPv6 Features3.0 IPv6 Networking
4.0 IPv6 Security5.0 IPv6 Utilities/Misc1.0 IPv6 Information
 got feedback?by Optimized got feedback?by Optimized got feedback?by Optimized
got feedback?by ironwalker got feedback?by ironwalker If you notice such a change or have additional information to add to the FAQ please let us know. got feedback?by Optimized IPv6 appears to be the only solution for the truly mobile and wireless Internet, both from the users' and the service providers' perspective. Read about it here.
got feedback?by ironwalker »www.sixxs.net/tools/ipv6calc/ got feedback?by ironwalker Most tunnel brokers require you to have the tunnel open 24/7, though. A number of big tunnel brokers have been set up, among which are in europe »www.sixxs.net/ , in canada »www.freenet6.net/ and Hurricane Electric »ipv6.he.net/ .
got feedback?by alien9999999 got feedback?by ironwalker got feedback?Why wouldn't there simply be an AAAA record for www? Why make it harder to find? From my reading it appears the AAAA record is preferred over the A record providing seamless integration into both networks. 2011-03-16 18:45:00 by alien9999999 • Global unicast addresses • Link-local addresses • Site-local addresses • Special IPv6 addresses • Compatibility addresses got feedback?by elite17 There is also a great blog related to mac & IPv6 found here got feedback?I have a blog, http://www.whatismyipv6.com/blogs/macipv6/wordpress/, that covers MacOSX IPv6 connectivity tips and techniques. You might want to point to it!
-mel 2009-08-19 16:21:05 by Optimized # ifconfig rl0 flags=8943 inet 128.176.184.9 netmask 0xffffff00 broadcast:128.176.184.255 inet6 fe80::2e0:18ff:fe50:b5da%rl0 prefixlen 64 scopeid 0x1 ether 00:e0:18:50:b5:da media: Ethernet autoselect (100baseTX ) status: active The "inet6" line gives the presence of an IPv6 stack away. That means your *BSD host is already operating as a dual-stack host, deciding itself, when to use which kind of transport.
got feedback?by ironwalker »www.tldp.org/HOWTO/Linux+IPv6-HOWTO/ got feedback?by ironwalker got feedback?by ironwalker * 1. Create an empty file by the name of "hostname. # touch /etc/hostname6.hme0 * 2. Reboot * 3. Excecute the following command for every interface that is now IPv6-enabled: # ifconfig This initializes the IPv6-Stack (inet6) for every interface. Note for Solaris 9 users: We have been told that this step is no longer neccessary on the newer version of Solaris. The corresponding interfaces are automatically initialized. * 4. At last excecute the script "/etc/init.d/inetinit". If more than one interface was enabled with IPv6 (or on Solaris 9, when the file "/etc/inet/ndpd.conf" is present) this will enable IPv6-forwarding and procedures like router advertisements and the routing protocol RIPng . If only one interface with IPv6 support is present only the neighbor discovery procedure will be started (as client). In any case this behaviour can also be changed by editing the "inetinit" script.
got feedback?by ironwalker Windows XP with Service Pack 1 was the first Microsoft OS to include IPv6 officially out of the box. It is not switched on by default though. In oder to switch it on one has to open a command shell (MS DOS box) and type c:\ netsh interface ipv6 install c:\ netsh interface ipv6 set privacy disabled persistent Without update q817778 it's "ipv6 install". In an output of "ipconfig /all". The host had no native IPv6 connectivity and also did not find an ISATAP server although it did configure the interface ("Automatic Pseudo Tunneling-Interface") with only link-local ISATAP-addresses. You can see that your host last resorted to configuring 6to4 and also assigned link-local IPv6 addresses (fe80::/10) to all interfaces.
got feedback?6to4 is not the last resort, in fact - if you have a public IP 6to4 is preferred.
Also, Teredo deserves atleast(!) a mention ...
/TJ ... trejrco@gmail.com 2009-04-20 15:32:28 thanks alot very helpful 2010-03-09 20:23:07 by ironwalker c:\ netsh interface ipv6 uninstall in the command shell. Please note that unlike after installation, a reboot is neccessary to fully uninstall the protocol. got feedback?by ironwalker Windows 2003 of course also includes IPv6 support out of the box. But it still isn't switched on by default. Next to the command line option to install IPv6, this version of Windows also includes the option to install the IPv6 protocol through the graphical user interface. This way should even be prefered and under no circumstance should the two ways be mixed, when installing/uninstalling the protocol. That is, don't use the graphical user interface to install IPv6 and then try to uninstall it via "ipv6 uninstall" in the shell or vice versa. Some strange things happen then, at least in a few cases when we tried that out. However the usual way through the graphical user interface works just fine, so there's no need to experiment with the command line just for installing IPv6. IPv6 is installed by opening the network properties of the current LAN connection (right-click on "My Network Places", go to "properties", right-click on LAN-Connection, again go to "properties"). The tab "General" includes the functionality to install additional network protocols. Just click on "Install" and search for "Microsoft TCP/IP Version 6" in the list of protocols. Select it and click "Ok". IPv6 is now installed and enabled. You don't even need to reboot. Uninstall by deselecting the "ipv6" protocol in network properties of the current lan connection.
got feedback?by ironwalker Unfortunately the authors of this Howto have no experience with using this software and would like to refer the interested reader to the documentation that comes with Trumpet's Winsock implemenation itself.
got feedback?by ironwalker The "Microsoft IPv6 Technology Preview" packages includes the following command line utilities (executable via the command shell) used to configure and monitor the IPv6 functionality of the host: * net.exe: Utility that stops or starts the IPv6 protocol and unloads/loads it from/to the memory. The relevant commands are c:\ net start tcpipv6 c:\ net stop tcpipv6 * ipv6.exe: Basic utility that configures network interfaces and updates the routing table. It also retrieves and displays information about the IPv6 protocol. * 6to4cfg.exe: Utility that sets up and configures 6to4. * ping6.exe, tracert6.exe: The IPv6 versions of the well-known utilities. * ttcp.exe: Utility that sends TCP or UDP data between two network nodes. Usefull to test speed and throughput both for IPv4 and IPv6. * ipsec.exe: Utility that configures policies and security associations for IPv6 IPsec traffic. The Preview supports stateless IPv6 address autoconfiguration. Therefore, if there's a router on the link advertising a global prefix, the Windows 2000 host will automatically configure a global IPv6 address for its interface and set the IPv6 default route correctly when tcpipv6 is started (s.a.). Stateless Autoconfiguration is usually sufficient but if addresses should rather be configured manually the tool ipv6.exe tool is used. 1. To see, how all or a specific interface are configured, use the following command: c:\ ipv6 if [if#] 2. To add an address to a specific interface, the following command is used: c:\ ipv6 adu If neither prefered nor valid lifetimes are specified the default is "infinite". If the parameter is set to zero the IPv6 address is removed. 3. The following command configures a few special attributes of an IPv6 interface. It enables or disables the interface to forward IPv6 packets or to send router advertisements both of which features are needed when the host should be used as a router. It also sets the MTU and the "site identifier" (aka prefix to advertise): c:\ ipv6 ifc 4. The tool is also used to configure routes. The following command adds a route entry to the routing table. Aside from the route itself also a time to live, preference value and wether or not the route should be published via some routing protocol can be set. c:\ ipv6 rtu 5. To display all IPv6 routes, use the following command: c:\ ipv6 rt Warning: IPv6 configuration is not saved permanently. If not added to an executable start script any configuration will be lost upnon reboot/restart of the IPv6 stack. Also, for windows 2000 with service pack 4; Grab the "IPv6 Technology Preview for Windows 2000" here; »www.microsoft.com/downloads/deta···yLang=en and follow these instructions to get it to install on service pack 4: 1. Save the file tpipv6-001205.exe from the download page to a local folder (for example, C:\IPv6TP). 2. From the local folder (C:\IPv6TP), run Tpipv6-001205.exe and extract the files to the same location. 3. From the local folder (C:\IPv6TP), run Setup.exe -x and extract the files to a subfolder of the current folder (for example, C:\IPv6TP\files). 4. From the folder containing the extracted files (C:\IPv6TP\files), open the file Hotfix.inf in a text editor. 5. In the [Version] section of the Hotfix.inf file, change the line NTServicePackVersion=256 to NTServicePackVersion=1024 (768 for SP3), and then save changes. --5a. From the folder containing the extracted files (C:\IPv6TP\files), open wship6.dll in a hex editor. --5b. Go to offset $3D64 (15716 decimal) and change the string "ip6.int." to be "ip6.arpa.". Make sure the editor is in overwrite/replace mode rather than insert mode. There is plenty of room to modify the string. This fixes a later change regarding reverse lookups. See RFC3152 6. From the folder containing the extracted files (C:\IPv6TP\files), run Hotfix.exe. 7. Restart the computer when prompted. 8. After the computer is restarted, continue installing the Microsoft IPv6 Technology Preview for Windows 2000 starting at step 3 of the "Installing the IPv6 Technology Preview for Windows 2000" section of either the Introduction to the Microsoft IPv6 Technology Preview for Windows 2000 or the Readme.htm file in the folder containing Setup.exe (C:\IPv6TP).
got feedback?Grab the "IPv6 Technology Preview for Windows 2000" @ http://www.microsoft.com/downloads/deta … layLang=en and follow these instructions to get it to install on service pack 4:
1. Save the file tpipv6-001205.exe from the download page to a local folder (for example, C:\IPv6TP).
2. From the local folder (C:\IPv6TP), run Tpipv6-001205.exe and extract the files to the same location.
3. From the local folder (C:\IPv6TP), run Setup.exe -x and extract the files to a subfolder of the current folder (for example, C:\IPv6TP\files).
4. From the folder containing the extracted files (C:\IPv6TP\files), open the file Hotfix.inf in a text editor.
5. In the [Version] section of the Hotfix.inf file, change the line NTServicePackVersion=256 to NTServicePackVersion=1024 (768 for SP3), and then save changes.
6. From the folder containing the extracted files (C:\IPv6TP\files), run Hotfix.exe.
7. Restart the computer when prompted.
8. After the computer is restarted, continue installing the Microsoft IPv6 Technology Preview for Windows 2000 starting at step 3 of the "Installing the IPv6 Technology Preview for Windows 2000" section of either the Introduction to the Microsoft IPv6 Technology Preview for Windows 2000 or the Readme.htm file in the folder containing Setup.exe (C:\IPv6TP). 2008-11-28 22:56:10 (davygrvy here's slight change.. I just discovered a few days ago about a bug in wship6.dll and have a fix for it. Please change the install instructions like so, or just renumber, thanks.
5a. From the folder containing the extracted files (C:\IPv6TP\files), open wship6.dll in a hex editor.
5b. Go to offset $3D64 (15716 decimal) and change the string "ip6.int." to be "ip6.arpa.". Make sure the editor is in overwrite/replace mode rather than insert mode. There is plenty of room to modify the string. This fixes a later change regarding reverse lookups. See RFC3152
2008-11-30 06:52:28 (davygrvy by ironwalker got feedback?by Skipdawg 2.0 IPv6 FeaturesIPv4 headers and IPv6 headers are not interoperable and the IPv6 protocol is not backward compatible with the IPv4 protocol. A host or router must use an implementation of both IPv4 and IPv6 in order to recognize and process both header formats. The new IPv6 header is only twice as large as the IPv4 header, even though IPv6 addresses are four times as large as IPv4 addresses.
got feedback?by Optimized In the late 1970s when the IPv4 address space was designed, it was unimaginable that it could be exhausted. However, due to changes in technology and an allocation practice that did not anticipate the recent explosion of hosts on the Internet, the IPv4 address space was consumed to the point that by 1992, it was clear a replacement would be necessary. With IPv6, it is even harder to conceive that the IPv6 address space will be consumed. To help put this number in perspective, a 128-bit address space provides 655,570,793,348,866,943,898,599 (6.5 × 10^23) addresses for every square meter of the Earth's surface. It is important to note that the decision to make the IPv6 address 128 bits in length was not so that every square meter of the Earth could have 6.5 x 10^23 addresses. Rather, the relatively large size of the IPv6 address is designed to be subdivided into hierarchical routing domains that reflect the topology of the modern-day Internet. The use of 128 bits provides multiple levels of hierarchy and flexibility in designing hierarchical addressing and routing that is currently lacking on the IPv4-based Internet.
got feedback?by Optimized Examples:
001000011101101000000001101001100000000000000000010111100111011 000000101010101000000001111111111111110001010001001110001011010 •We divide it into 16 bit boundaries: 0010000111011010 000000011010011 0000000000000000 0010111100111011 0000001010101010 000000011111111 1111111000101000 1001110001011010 •Each of these 16 bit boundaries is converted to hexadecimal (base 16) and delimited with colons: 21DA : 00D3 : 0000 : 2F3B : 02AA : 00FF : FE28 : 9C5A •Leading zeros are suppressed. However, there must be at least one single digit in each boundary: 21DA:D3:0:2F3B:02AA:FF:FE28:9C5A
got feedback?Re. IPv6 Address Syntax (#10289) examples:
The second and sixth binary boundaries (000000011010011 and 000000011111111, respectively) are each only 15 bits long. 2009-10-29 16:00:49 I think you've missed two bits./PeterB 2009-07-06 10:57:33 by david987 got feedback?by david987 3.0 IPv6 Networking
By adding IPv6 to a home setup one will receive a few advantages: 1. No more natting (at home), 2. Redundant email connection, 3. Global routable addresses for my servers, 4. P2P apps work. Full how to here; »www.nlnetlabs.nl/ipv6/case-studi···et/ipv6/ part 2 here; »www.nlnetlabs.nl/ipv6/case-studi···6-take2/
got feedback?by ironwalker It can also be expressed as ::1 IPv6 Subnetting; The design of the IPv6 address space differs significantly from IPv4. The primary reason for subnetting in IPv4 is to improve efficiency in the utilization of the relatively small address space available, particularly to enterprises. No such limitations exist in IPv6, as the address space available even to end-users is large. An IPv6 subnet always has 64 bits in its host portion. It therefore has a /64 routing prefix (the 64 most-significant bits). Although it is technically possible to use smaller subnets, they are impractical for local area networks because stateless address autoconfiguration of network interfaces (RFC 4862) requires a /64 address. IPv6 does not implement special address formats for broadcast traffic or network numbers, and thus all addresses in a subnet are valid host addresses. The recommended allocation for an IPv6 customer site is an address space of 80 address bits (prefix /48), but it may be as small as 72 bits (/56 allocation) for a residential customer network.[4] This provides 65,536 subnets for a site, or at least a minimum of 256 subnets for a residential network. Subnetting in IPv6 is used to route traffic between the global allocation spaces and within customer network between subnets and the larger Internet. Subnetting in IPv6 is also based on the concepts of Classless Inter-Domain Routing and the standard CIDR notation is used with IPv6 addresses.
got feedback?by Harddrive The network prefix determines a network; its length depends on the network class. Subnetting helps to organize a network by breaking it into several subnets. To define such subnets, you must take bits from the host portion of the IP address. That also extends the network prefix. The subnet mask explicitly defines network and host bits as 1 and 0, respectively. Below, is a calculation of a subnet mask for a computer with IP address 192.35.128.93 that belongs to network with six subnets. Step 1 Determine the network class (A, B or C) based on IP address: * If IP addresses begin with 1 to 126, it is Class A. * If IP addresses begin with 128 to 191, it is Class B. * If IP addresses begin with 192 to 223, it is Class C. In our example, the network is class C since the IP address 192.35.128.93 start with 192. Step 2 Determine number of bits needed to define subnets: * Number of subnets = (2^Number of bits) - 2. Hence, * Number of bits = Log2(Number of subnets + 2). In our example, there are six subnets: * Number of bits = Log2(6 + 2) = Log2(8) = 3. Three bits in the IP address are used as a subnet portion. Step 3 Compose the subnet mask in binary form by extending the default subnet mask with subnet bits. Default subnet mask for classes A to C are: * 11111111.00000000.00000000.00000000 (Class A, network part is 8 bits) * 11111111.11111111.00000000.00000000 (Class B, network part is 16 bits) * 11111111.11111111.11111111.00000000 (Class C, network part is 24 bits) In our example, an extension of the default class C subnet mask with 3 bits (Step 2) results in the subnet mask 11111111.11111111.11111111.11100000. Step 4 Convert the binary subnet mask to the decimal-dot form. The binary form contains four octets (8 bits in each). Use following rules: * For "1111111" octet, write "255". * For "00000000" octet, write "0". * If octet contains both "1" and "0" use the formula: Integer number = (128 x n) + (64 x n) + (32 x n) + (16 x n) + (8 x n) + (4 x n) + (2 x n) + (1 x n) Where "n" is either 1 or 0 in the corresponding position in the octet sequence. In our example, for 11111111.11111111.11111111.11100000 11111111 ---> 255 11111111 ---> 255 11111111 ---> 255 11100000---> (128 x 1) + (64 x 1) + (32 x 1) + (16 x 0) + (8 x 0) + (4 x 0) + (2 x 0) + (1 x 0) = 224 Subnet mask is 255.255.255.224. You can also use one of the many online Subnet calculators available on the net. Here is one, »www.subnetonline.com/pages/subne···ator.php To subnet the IPv6 address space, you use same ipv4 subnetting techniques to divide the 16-bit Subnet ID field for a 48-bit global or unique local address prefix in a manner that allows for route summarization and delegation of the remaining address space to different portions of an IPv6 intranet. You need not subnet in any specific fashion. The subnetting technique described here assumes that you subnet by dividing the variable portions of the address space of the Subnet ID field using its high-order bits. Although this method promotes hierarchical addressing and routing, it is not required. For example, in a small organization with a small number of subnets, you can also easily create a flat addressing space for global addresses by numbering the subnets starting from 0. More detailed information and examples for ipv4 and ipv6 here; »technet.microsoft.com/en-us/libr···997.aspx
got feedback?by ironwalker Let us proceed with the installation routine. The following is an outline of steps. First, install IPv6 and IPv6 netfilter support into your kernel. Then, add IPv6 support into your IPv4 firewall. Don't forget to sign up for an account with Freenet6. Use the Debian package manager (APT) to install freenet6, radvd, dnsmasq, iputils-ping, and iputils-tracepath (apt-get install). Configure both freenet6 and radvd to work with your system and your individual configuration. Finally, obtain an IPv6 firewall script for the gateway....read more here »cruisefx.justjohnnyweb.net/Docum···PV6.html
got feedback?While the link is now invalid, I found the content at http://www.spack.org/wiki/DebianIpv6Router 2010-12-28 13:39:48 (aefstoggaflm by ironwalker
got feedback?by ironwalker Because of the standardized transitioning methods, such as 6to4, Simple Internet Transition (SIT) tunnels and IPv6 over UDP (such as Teredo and Shipworm), IPv6 traffic may be coming into networks without their administrators being aware of the fact (and thus, without them being aware that they are vulnerable to IPv6 exploits). For example, since many firewalls allow UDP traffic, IPv6 over UDP can get through those firewalls without administrators realizing what’s happening. Attackers can use 6 over 4 tunnels to evade Intrusion Detection software. It’s also important to note that the Internet Connection Firewall (ICF) that is included with Server 2003 is only capable of filtering IPv4 traffic; it cannot block IPv6 traffic. Attackers can exploit this and get into your network with IPv6 packets if you don’t implement other firewall software that has this capability.
got feedback?by ironwalker 5.0 IPv6 Utilities/MiscIPConvert is a simple tool, that converts an IPv4 formatted address to an IPv6 (Internet Protocol Version 6) formatted address. It displays the converted address in Full , Shorthand , and Dot Notation formats. Useful for quick conversions, and for getting used to the (eventually) upcoming IPv6 protocol. got feedback?by Optimized Click Here got feedback?by Optimized | ||||||||||||||||||||||||
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