IT notes

vps

VPS providers that allow use your own image/kernel Google cloud (only ipv4) Allows to upload compreses raw images: tar --format=gnutar -Szcf disk.tar.gz disk.raw MTU needs to be set to 1460 and in some cases disable the checksum offload Amazon AWS (only ipv4) Images can’t be uploaded compressed, ans disabling TSO is required: ifconfig_DEFAULT="SYNCDHCP -tso" IPV6 support vultr https://www.vultr.com/ Instead of uploading the raw images, they will be fetched, a URL needs to be provider from where the image can be downloaded.

ipv6 off

Turn off IPv6 on mac First list interfaces: $ networksetup -listallnetworkservices An asterisk (*) denotes that a network service is disabled. Thunderbolt Ethernet Wi-Fi Bluetooth PAN Thunderbolt Bridge Next: $ networksetup -setv6off "Thunderbolt Ethernet" For Wi-Fi: $ networksetup -setv6off Wi-Fi

ipv6 tunnelbroker

6in4 6in4 uses tunneling to encapsulate IPv6 traffic over explicitly-configured IPv4 links. The 6in4 traffic is sent over the IPv4 Internet inside IPv4 packets whose IP headers have the IP protocol number set to 41. https://en.wikipedia.org/wiki/6in4 “6to4” is a tunneling method that is only interesting for reaching IPv6-only services. And 6to4 makes sense only if one has a public IPv4 address. As a rule, you only need to enable “6to4” if you want to access services that are only IPv6.