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Brad Fitzpatrick 58abae1f83 net/dns/{publicdns,resolver}: add NextDNS DoH support ... NextDNS is unique in that users create accounts and then get user-specific DNS IPs & DoH URLs. For DoH, the customer ID is in the URL path. For IPv6, the IP address includes the customer ID in the lower bits. For IPv4, there's a fragile "IP linking" mechanism to associate your public IPv4 with an assigned NextDNS IPv4 and that tuple maps to your customer ID. We don't use the IP linking mechanism. Instead, NextDNS is DoH-only. Which means using NextDNS necessarily shunts all DNS traffic through 100.100.100.100 (programming the OS to use 100.100.100.100 as the global resolver) because operating systems can't usually do DoH themselves. Once it's in Tailscale's DoH client, we then connect out to the known NextDNS IPv4/IPv6 anycast addresses. If the control plane sends the client a NextDNS IPv6 address, we then map it to the corresponding NextDNS DoH with the same client ID, and we dial that DoH server using the combination of v4/v6 anycast IPs. Updates #2452 Change-Id: I3439d798d21d5fc9df5a2701839910f5bef85463 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>		2 years ago
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addlicense	cmd/addlicense: add command to add licenseheaders to generated code	3 years ago
cloner	cmd/{cloner,viewer}: add support for map values with pointers	2 years ago
derper	cmd/derper: filter out useless HTTP error logs (#5563)	2 years ago
derpprobe	net/stun: convert to use net/netip.AddrPort	2 years ago
gitops-pusher	cmd/gitops-pusher: standardize hujson before posting to validate (#5525)	2 years ago
hello	net/netaddr: start migrating to net/netip via new netaddr adapter package	2 years ago
mkpkg	cmd/mkpkg: use package flag (#4373)	2 years ago
nginx-auth	cmd/nginx-auth/nginx-auth: update auth to allow for new domains	2 years ago
printdep	Docker: add ALPINE.txt to manage alpine versions	2 years ago
proxy-to-grafana	all: gofmt for Go 1.19	2 years ago
speedtest	cmd: upgrade to ffcli v3	3 years ago
tailscale	cmd/tailscale/cli: add backwards compatibility 'up' processing for legacy client	2 years ago
tailscaled	net/dns/{publicdns,resolver}: add NextDNS DoH support	2 years ago
testcontrol	all: use any instead of interface{}	2 years ago
tsconnect	cmd/tsconnect: temporarily switch to xterm.js fork that handles popup windows	2 years ago
tsshd	cmd/tsshd: add a package line to appease gofmt	2 years ago
viewer	cmd/viewer: add flag to support Clone generation without Views	2 years ago