Remote-access Guide

ipv6 prefix assignment routing and remote access

by Miracle Denesik Published 2 years ago Updated 1 year ago
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On the General tab, click IPv6 Router or IPv6 Remote access server, or both, depending on your requirements. If you are configuring remote access for IPv6, on the IPv6 tab, type the IPv6 prefix that is to be assigned to incoming IPv6 remote clients (for example: 2001:1234:5678:90ab::). Click OK, and then click Yes to restart RRAS.

Full Answer

What is the IPv6 prefix used for address assignment?

IPv6 prefix 2002:836b:2:1000::/64 is used for IPv6 address assignment. Changing the IPv6 prefix requires the remote access service to be restarted in order to take effect. This is conveyed through the warning message.

How to assign IPv4 and IPv6 addresses to remote access services?

The cmdlet specifies the IPv4 address assignment to happen from the IP range 30.1.1.10 through 30.1.1.30. IPv6 prefix 2002:836b:2:1000::/64 is used for IPv6 address assignment. Changing the IPv6 prefix requires the remote access service to be restarted in order to take effect. This is conveyed through the warning message.

How do I enable IPv6 forwarding in RRAS?

On the server side in my RRAS server I goto Routing and Remote Access, and then click Properties and in the IPv6 Tab I assigned an IPv6 Prefix 2602:ff84:: and checked both the check boxes "Enable IPv6 Forwarding" and "Enable Default route advertisement". Now My clients are getting the IPv6 address but they are unable to browse IPv6 websites.

How do I enable IPv6 forwarding in my DNS?

I left the DNS as it is. On the server side in my RRAS server I goto Routing and Remote Access, and then click Properties and in the IPv6 Tab I assigned an IPv6 Prefix 2602:ff84:: and checked both the check boxes "Enable IPv6 Forwarding" and "Enable Default route advertisement".

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What is IPv6 prefix assignment?

IPv6 is not the same as IPv4. In IPv6 you assign a short prefix to each end-user site, so they are able to have as many subnets (/64s) as they need. You should not be concerned with exhausting the IPv6 addressing space, and you should think big when planning future requirements.

What is IPv6 routed prefix?

The site prefix of an IPv6 address occupies up to 48 of the leftmost bits of the IPv6 address. For example, the site prefix of the IPv6 address 2001:db8:3c4d:0015:0000:0000:1a2f:1a2b/48 is contained in the leftmost 48 bits, 2001:db8:3c4d.

How do I enable IPv6 remotely?

To enable IPv6 connections Right-click Your Server Name, and then click Properties. If you are using Server Manager, right-click Routing and Remote Access, and then click Properties. On the General tab, click IPv6 Router or IPv6 Remote access server, or both, depending on your requirements.

How do I use RDP with IPv6?

0:471:47IPV6 : Remote Desktop Connection - YouTubeYouTubeStart of suggested clipEnd of suggested clipFirst in a square bracket. Type 2 0 0 1 double column 3 0 0 and here it will ask for username. AndMoreFirst in a square bracket. Type 2 0 0 1 double column 3 0 0 and here it will ask for username. And password fill the username and password of PC.

How does IPv6 routing work?

Routing in IPv6 is almost identical to IPv4 routing under CIDR. The only difference is the addresses are 128-bit IPv6 addresses instead of 32-bit IPv4 addresses. With very straightforward extensions, all of IPv4's routing algorithms, such as OSPF, RIP, IDRP, IS-IS, can be used to route IPv6.

How are IPv6 addresses assigned?

IPv6 unicast addresses generally use 64 bits for the network ID and 64 bits for the host ID. The network ID is administratively assigned. The host ID is configured manually or auto-configured by any of the following methods: Using a randomly generated number.

Should I have IPv6 enabled?

When possible, it is better to keep both IPv4 and IPv6 addresses enabled. For example, using only IPv6 can cause some accessibility issues, as only about one third of the internet supports IPv6 addresses. Likewise, disabling IPv6 can cause certain problems, especially if your router is already using an IPv6 address.

Should I disable IPv6 on router?

Why Disable IPv6 on a Router? There are a few reasons why you would want to disable this feature. If your connected devices have not been manufactured to integrate with the IPv6 protocol, for instance, or if your modem does not play nice with the format.

Is it safe to disable IPv6?

We do not recommend that you disable IPv6 or its components. If you do, some Windows components may not function. We recommend using Prefer IPv4 over IPv6 in prefix policies instead of disabling IPV6.

How do I Ping An IPv6 address?

Activity 8 - Ping an Internet Host by IPv6 Address To test IPv6 Internet connectivity: Type ping 2001:4860:4860::8888 and press Enter. Observe the results. If you see replies indicating success, you have IPv6 Internet connectivity.

What is port for RDP?

Overview. Remote Desktop Protocol (RDP) is a Microsoft proprietary protocol that enables remote connections to other computers, typically over TCP port 3389.

How do I check my IPv6 Ping?

Just use the command ping6 tools.keycdn.com . It might is required to specify the interface with the argument -I eth0 (replace eth0 with the appropriate interface).

What does ::/ 0 mean in IPv6?

0.0.0.0/0,::/0 - Means source can be any ip address, means from any system request is accepted, 0.0.0.0/0 represents ipv4 and ::/0 represents ipv6.

What does the ::/ 0 address mean in IPv6?

::/0. That represents a prefix of all zeros with no significate network bits. Therefore it encompasses all IPv6 addresses.

What are the IPv6 address types?

The three types of IPv6 addresses are: unicast, anycast, and multicast. Unicast addresses identify a single interface.

What is IPv6 subnet?

IN IPv6, the subnet ID defines an administrative subnet of the network and is up to 16 bits in length. You assign a subnet ID as part of IPv6 network configuration. The subnet prefix defines the site topology to a router by specifying the specific link to which the subnet has been assigned.

What is IPv6 prefix?

The IPv6 general (or generic) prefix feature lets you renumber a global prefix on your router or switch. This is a simple but pretty useful feature. You can configure these prefixes manually on your interfaces but once your global prefix changes, you have to manually reconfigure your IPv6 addresses.

How many bits are in IPv6?

The upper 64 bits of an IPv6 prefix usually consists of a /48 global routing prefix (or site prefix) and the remaining 12 bits are used for more specific prefixes (the subnet). This is explained in detail in the following lesson:

How many prefixes are there in 2001?

This is looking good. You can see we have four prefixes and the global prefix is 2001:41F0:4060.

Can you configure IPv6 prefixes?

You can configure these prefixes manually on your interfaces but once your global prefix changes, you have to manually reconfigure your IPv6 addresses. With the IPv6 general prefix feature, we can do this automatically.

What is IPv6 in Windows Server 2008?

Internet Protocol version 6 (IPv6) is a mandatory part of Windows Vista and Windows Server 2008 and newer versions. We do not recommend that you disable IPv6 or its components. If you do, some Windows components may not function. We recommend using Prefer IPv4 over IPv6 in prefix policies instead of disabling IPV6.

What version of IP address is 4291?

For information about RFC 4291, see IP Version 6 Addressing Architecture.

What is 6to4 tunneling?

By default, the 6to4 tunneling protocol is enabled in Windows when an interface is assigned a public IPv4 address (Public IPv4 address means any IPv4 address that isn’t in the ranges 10.0.0.0/8, 172.16.0.0/12, or 192.168.0.0/16). 6to4 automatically assigns an IPv6 address to the 6to4 tunneling interface for each address, and 6to4 dynamically registers these IPv6 addresses on the assigned DNS server. If this behavior isn’t desired, we recommend disabling the IPv6 tunnel interfaces on the affected hosts.

What is RFC 3484?

Windows Vista, Windows Server 2008, and later versions of Windows implement RFC 3484 and use a prefix table to determine which address to use when multiple addresses are available for a Domain Name System (DNS) name.

Description

The Set-VpnIPAddressAssignment cmdlet is only used to toggle from one IPv4 address assignment type to another. This cmdlet cannot be used to add additional IPv4 address ranges if a static pool IP address assignment is being used.

Examples

This cmdlet sets the IPv4 address assignment type to be DHCP which causes IPv4 address assignment to happen from a DHCP server.

Parameters

Runs the cmdlet as a background job. Use this parameter to run commands that take a long time to complete.

Outputs

The Microsoft.Management.Infrastructure.CimInstance object is a wrapper class that displays Windows Management Instrumentation (WMI) objects. The path after the pound sign ( #) provides the namespace and class name for the underlying WMI object.

How many bits are in an IPv6 prefix?

Each hexadecimal character in an IPv6 prefix represents one nibble, which is 4 bits. The length of a delegated prefix should therefore always be a multiple of 4.

What is the default prefix size for a addressing plan?

It should be remembered that some protocols/mechanisms use a default /48 prefix size (tunnel brokers, ULA, 6to4, among others), so if a customer already has an addressing plan, they will be forced to redo it and renumber in case of a different prefix size. Instead, using the same prefix size, allow them to keep the addressing plan and just renumber some of the prefix bits rather than have a complete numbering plan change.

What is a 64 prefix?

Using a /64 prefix from a dedicated pool of IPv6 prefixes is the most common scenario and currently the best practice. A separate block of IPv6 space is allocated for the WAN links to the end customer CPEs, so that when CPE connects to the network and performs router discovery, a /64 prefix is used to number both ends of the connection.

Why is non persistent prefix assignment easier?

Non-persistent prefix assignment also appears initially easier as it facilitates aggregation of internal routing tables according to end customer connection termination points. Every termination point has its own pool of IPv6 prefixes that are nicely aggregable, whilst with persistent IPv6 prefix assignments it is necessary to discover which customer is terminated at which termination point, group them into larger IPv6 pools, and then update our database accordingly. This is unless your provisioning system is doing it in the other way around from an AAA database and is typically tied to an IPAM for the initial assignment to each new customer.

What is the role of an ISP?

The task of any ISP is to provide its customers with Internet connectivity, which includes providing those customers with IP addresses. Customers generally receive a single IPv4 address, but with IPv6 a customer requires a block of addresses, also known as a prefix. This document provides guidance as to what size such prefixes should be.

When choosing which /64 to use, the recommended option is to dedicate a separate pool of prefixes?

When choosing which /64 to use, the recommended option is to dedicate a separate pool of prefixes for the WAN links. While the addressing plan and administration might be easier when selecting the /64 from the prefix delegated to the customer, this is technically “stealing” because the customer's CPE has been informed that whole prefix will be delegated to it, so it should not also be used on the WAN link unless it is known that all CPEs will support RFC 6603 to negotiate this.

When is the setup process concluded?

In the case of an end-user host (not router) connecting over PPPoE (for example), the setup process is concluded when the host is properly IPv6 numbered and can start sending and receiving traffic.

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Summary

Use Registry Key to Configure IPv6

  • The IPv6 functionality can be configured by modifying the following registry key: Location: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip6\Parameters\ Name: DisabledComponents Type: REG_DWORD Min Value: 0x00 (default value) Max Value: 0xFF (IPv6 disabled) By default, the 6to4 tunneling protocol is enabled in Windows when an interface i...
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How to Calculate The Registry Value

  • Windows use bitmasks to check the DisabledComponentsvalues and determine whether a component should be disabled. To learn which component each bit (from low to high) controls, refer to the following table. For each bit, 0 means false and 1means true. Refer to the following table for an example.
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Reference

  • For more information about RFC 3484, see Default Address Selection for Internet Protocol version 6 (IPv6). For more information about how to set IPv4 precedence over IPv6, see Using SIO_ADDRESS_LIST_SORT. For information about RFC 4291, see IP Version 6 Addressing Architecture. For more information about the related issues, see the articles below: 1. Example 1…
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