IPv6 NAT helps to translate IPv4 addresses to IPv6 addresses of network devices. IPv6 NAT also helps to translate the address between IPv6 hosts. IPv6 NAT supports source NAT, destination NAT, and static NAT.
Unique Local Unicast Addresses (ULAs) are the currently preferred version of private addressing for IPv6. IPv6 has had two versions of private addressing – deprecated site-local addressing and the current Unique Local Unicast Addresses (ULAs).
As others have pointed out, NAT is not a security feature. However, it does offer some level of security as a byproduct: a side-effect of NAT is that none of the inner machine is accessible "from the outside". The same effect can be achieved by a firewall which blocks all incoming connections.
At the same time that IPv6 was being developed by the Internet Engineering Task Force (IETF), DHCP was updated for IPv6 networks with a new protocol named DHCPv6. DHCP for IPV4 and DHCPv6 are two completely separate protocols, but they do share some characteristics.
How does NAT work? A. Basically, NAT allows a single device, such as a router, to act as an agent between the Internet (or public network) and a local network (or private network), which means that only a single unique IP address is required to represent an entire group of computers to anything outside their network.
This Article Applies to:
- Log in to the web-based interface of the router.
- Go to Advanced > IPv6.
- Enable IPv6 and select the internet connection type provided by your ISP.
- Fill in information as required by different connection types.
- Configure LAN ports.
IPsec makes IPv6 more secure than IPv4Internet Protocol Security (IPsec) was designed to provide network layer security (authentication and encryption). IPsec in IPv4 is often used for VPNs. These are terminated at the edge of networks. IPv4 IPsec is rarely used to secure end-to-end traffic.
IPv4 is a 32-Bit IP Address. IPv6 is 128 Bit IP Address. IPv4 is a numeric address, and its binary bits are separated by a dot (.) IPv6 is an alphanumeric address whose binary bits are separated by a colon (:).
Without NAT, IPv6 is faster than IPv4That's in part because of the proliferation of network-address translation (NAT) by service providers for IPv4 Internet connectivity. The lack of NAT usage by IPv6 means that TCP and UDP header checksums do not need to be re-computed like with IPv4.
Because NAT exists to overcome a shortage of IPv4 addresses, and because IPv6 has no such shortage, IPv6 networks do not require NAT.
IPv6 is extremely important for the long-term health of the Internet. Switching from IPv4 to IPv6 will give the Internet a much larger pool of IP addresses. It should also allow every device to have its own public IP address, rather than be hidden behind a NAT router.
According to Microsoft, if you want to enjoy the best possible Xbox One gaming experience, you should use IPv6. IPv6 is the successor to IPv4, the address scheme used by every device to connect to the internet (or local network). When you refer to an IP address (192.168. 0.101), you are talking about an IPv4 address.
Even if that happens, however, CloudFlare predicts that full IPv6 adoption would take seven years, until January 2020.
In some countries, major mobile networks are driving IPv6 adoption. In Japan (NTT – 7%, KDDI – 42% and Softbank – 34%), India (Reliance JIO – 87%) and the USA (Verizon Wireless – 84%, Sprint – 70%, T-Mobile USA – 93%, and AT&T Wireless – 57%) national mobile networks have very high levels of IPv6 deployment.
To set up an IPv6 Internet connection through auto configuration:
- Launch an Internet browser from a computer or wireless device that is connected to the network.
- The user name is admin.
- Select ADVANCED > Advanced Setup > IPv6.
- In the Internet Connection Type list, select Auto Config.
The reason is that the IPv5 doesn't exist. It never made it to become one of the IP protocols. It was planned as a streaming protocol, and it got to its second version ST2. Its packets had the IP version 5 ID but eventually died as a draft.
You should use both IPv4 and IPv6 addresses. Nearly everyone on the Internet currently has an IPv4 address, or is behind a NAT of some kind, and can access IPv4 resources. If you want your site to be reliable for these users, you must serve it via IPv6 (and the ISP must have deployed IPv6).
Six Benefits Of IPv6
- More Efficient Routing. IPv6 reduces the size of routing tables and makes routing more efficient and hierarchical.
- More Efficient Packet Processing. IPv6's simplified packet header makes packet processing more efficient.
- Directed Data Flows.
- Simplified Network Configuration.
- Support For New Services.
- Security.
Advantages of IPv6 over IPv4
| Why IPv6? | IPv4 |
|---|
| IPv6 has more addresses | 4.3 billion addresses |
| IPv6 networks are easier and cheaper to manage | Networks must be configured manually or with DHCP. IPv4 has had many overlays to handle Internet growth, which demand increasing maintenance efforts. |
Pros and Cons of IPv6
- PROS. Efficient Routing. Multi Routing. Directed Local Address.
- CONS. System Issues. Complexity in the Network Topology Drawings. Upgrading the devices.
- BENEFITS OF USING IPv6 AND IPv4 TOGETHER. Dual-Stack Network. Tunneling. Network Address Translation-Protocol Translation (NAT-PT) aka RFC-2766.
Major Features of IPv6
- Expanded Addressing. IP address size increases from 32 bits in IPv4 to 128 bits in IPv6, to support more levels of addressing hierarchy.
- Address Autoconfiguration and Neighbor Discovery.
- Header Format Simplification.
- Improved Support for IP Header Options.
- Application Support for IPv6 Addressing.
- Additional IPv6 Resources.
