Maya Posch discusses the transition from IPv4 to IPv6, noting how fundamental networking concepts like UDP broadcasting and subnetting change in an IPv6 environment. While IPv6 simplifies some aspects by treating broadcasting as a form of multicasting via specific addresses and eliminating traditional subnets through massive address spaces (like /64 prefixes), it introduces complexities regarding service discovery and the lack of direct NAT compatibility.
- In IPv6, UDP "broadcasting" is achieved using a link-local multicast group at `ff02::1`.
- The standard IPv6 subnet size is `/64`, providing an address space roughly four billion times larger than typical IPv4 subnets.
- Transitioning between protocols can be difficult due to the lack of direct compatibility, often requiring dual-stack implementations or encapsulation.
- NPTv6 (Network Prefix Translation) exists as a way to perform NAT-like functions with prefixes rather than individual addresses in IPv6.
- In IPv6, UDP "broadcasting" is achieved using a link-local multicast group at `ff02::1`.
- The standard IPv6 subnet size is `/64`, providing an address space roughly four billion times larger than typical IPv4 subnets.
- Transitioning between protocols can be difficult due to the lack of direct compatibility, often requiring dual-stack implementations or encapsulation.
- NPTv6 (Network Prefix Translation) exists as a way to perform NAT-like functions with prefixes rather than individual addresses in IPv6.
China's Cyberspace Administration has released a strategic plan to accelerate IPv6 adoption through 2030, aiming for significant growth in users and network traffic. A key element is the development of "IPv6+", which allows metadata describing content to be embedded into packets. While this offers telcos new ways to manage traffic and billing, experts warn it could enable enhanced state censorship and surveillance by allowing operators to identify and block specific types of data or users via packet metadata.
- Goal of 950 million active IPv6 users by 2030
- Transition toward single-stack network infrastructure
- Risks regarding increased government monitoring and censorship
- Global export of China's specialized networking equipment
- Goal of 950 million active IPv6 users by 2030
- Transition toward single-stack network infrastructure
- Risks regarding increased government monitoring and censorship
- Global export of China's specialized networking equipment
Instructions on how to disable IPv6 in Armbian, specifically for use with an ADS-B host. Includes commands for editing configuration files and rebooting.
```
sudo -s
# sed -i "$ a\ipv6.disable=1" /boot/armbianEnv.txt
# echo "blacklist ipv6 > /etc/modprobe.d/no-ipv6.conf
# echo "net.ipv6.conf.all.disable_ipv6 = 1" > /etc/sysctl.d/no-ipv6.conf
# sed -i "/::/s/^/# /" /etc/hosts
# reboot
```
```
sudo -s
# sed -i "$ a\ipv6.disable=1" /boot/armbianEnv.txt
# echo "blacklist ipv6 > /etc/modprobe.d/no-ipv6.conf
# echo "net.ipv6.conf.all.disable_ipv6 = 1" > /etc/sysctl.d/no-ipv6.conf
# sed -i "/::/s/^/# /" /etc/hosts
# reboot
```
An IETF draft proposes allocating the 44::/16 IPv6 block (about 2^112 addresses) to the amateur radio community, echoing the historic 44/8 IPv4 allocation, and raises questions about internet governance and policy.
