This does three things:
* If you're on GCP, it adds a *.internal DNS split route to the
metadata server, so we never break GCP DNS names. This lets people
have some Tailscale nodes on GCP and some not (e.g. laptops at home)
without having to add a Tailnet-wide *.internal DNS route.
If you already have such a route, though, it won't overwrite it.
* If the 100.100.100.100 DNS forwarder has nowhere to forward to,
it forwards it to the GCP metadata IP, which forwards to 8.8.8.8.
This means there are never errNoUpstreams ("upstream nameservers not set")
errors on GCP due to e.g. mangled /etc/resolv.conf (GCP default VMs
don't have systemd-resolved, so it's likely a DNS supremacy fight)
* makes the DNS fallback mechanism use the GCP metadata IP as a
fallback before our hosted HTTP-based fallbacks
I created a default GCP VM from their web wizard. It has no
systemd-resolved.
I then made its /etc/resolv.conf be empty and deleted its GCP
hostnames in /etc/hosts.
I then logged in to a tailnet with no global DNS settings.
With this, tailscaled writes /etc/resolv.conf (direct mode, as no
systemd-resolved) and sets it to 100.100.100.100, which then has
regular DNS via the metadata IP and *.internal DNS via the metadata IP
as well. If the tailnet configures explicit DNS servers, those are used
instead, except for *.internal.
This also adds a new util/cloudenv package based on version/distro
where the cloud type is only detected once. We'll likely expand it in
the future for other clouds, doing variants of this change for other
popular cloud environments.
Fixes#4911
RELNOTES=Google Cloud DNS improvements
Change-Id: I19f3c2075983669b2b2c0f29a548da8de373c7cf
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
The goal here is to
1. make it so that the number doesn't diverge between the various places
we had it defined
2. not define the number in corp, only in oss
Signed-off-by: Maisem Ali <maisem@tailscale.com>
The Dockerfile directions said:
But that failed with:
Step 14/15 : FROM ghcr.io/tailscale/alpine-base:3.14
Head "https://ghcr.io/v2/tailscale/alpine-base/manifests/3.14": denied: denied
So I guess the Dockerfile.base part was undocumented. But it only had
one line anyway, so move it here to avoid the intermediate layer's
published permissions problem entirely.
Also optimize the cachability a bit while here.
Change-Id: I846ad59fe7e88e6126925689fae78bfb80c279f0
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
The iOS and macOS networking extension API only exposes a single setter
for the entire routing and DNS configuration, and does not appear to
do any kind of diffing or deltas when applying changes. This results
in spurious "network changed" errors in Chrome, even when the
`OneCGNATRoute` flag from df9ce972c7 is
used (because we're setting the same configuration repeatedly).
Since we already keep track of the current routing and DNS configuration
in CallbackRouter, use that to detect if they're actually changing, and
only invoke the platform setter if it's actually necessary.
Updates #3102
Signed-off-by: Mihai Parparita <mihai@tailscale.com>
See https://github.com/tailscale/tailscale/issues/4924#issuecomment-1168201823
Arch uses a different login binary that makes the -h flag set the PAM
service to "remote". So if they don't have that configured, don't pass -h.
Thanks to @eddiezane for debugging!
Updates #4924
Change-Id: I8d33e0afb2dfb99517bcea2f9d5d0c6247519b3c
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
There appear to be devices out there which send only their
first descriptor in response to a discovery packet for
`ssdp:all`, for example the Sagemcom FAST3890V3 only sends
urn:schemas-wifialliance-org:device:WFADevice:1
Send both ssdp:all and a discovery frame for
InternetGatewayDevice specifically.
Updates https://github.com/tailscale/tailscale/issues/3557
Signed-off-by: Denton Gentry <dgentry@tailscale.com>
... so callers can provide the AuthKey via mechanisms other than
environment variables which means multiple Servers can't be started
concurrently in the same process without coordination.
Change-Id: I7736ef4f59b7cc29637939e140e990613ce58e0d
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
Whenever the SSH policy changes we revaluate all open connections to
make sure they still have access. This check was using the wrong
timestamp and would match against expired policies, however this really
isn't a problem today as we don't have policy that would be impacted by
this check. Fixing it for future use.
Signed-off-by: Maisem Ali <maisem@tailscale.com>
(breaking up parts of another change)
This adds a PacketFilter hashing benchmark with an input that both
contains every possible field, but also is somewhat representative in
the shape of what real packet filters contain.
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
When there are group policy entries for the NRPT that do not belong to Tailscale,
we recognize that we need to add ourselves to group policy and use that registry
key instead of the local one. We also refresh the group policy settings as
necessary to ensure that our changes take effect immediately.
Fixes https://github.com/tailscale/tailscale/issues/4607
Signed-off-by: Aaron Klotz <aaron@tailscale.com>
Link-local addresses on the Tailscale interface are not routable.
Ideally they would be removed, however, a concern exists that the
operating system will attempt to re-add them which would lead to
thrashing.
Setting SkipAsSource attempts to avoid production of packets using the
address as a source in any default behaviors.
Before, in powershell: `ping (hostname)` would ping the link-local
address of the Tailscale interface, and fail.
After: `ping (hostname)` now pings the link-local address on the next
highest priority metric local interface.
Fixes#4647
Signed-off-by: James Tucker <james@tailscale.com>
This is for an upcoming blogpost on how to manage Tailscale ACLs using a
GitOps flow. This tool is intended to be used in CI and will allow users
to have a git repository be the ultimate source of truth for their ACL
file. This enables ACL changes to be proposed, approved and discussed
before they are applied.
Signed-off-by: Xe <xe@tailscale.com>
Client.SetExpirySooner isn't part of the state machine. Remove it from
the Client interface.
And fix a use of LocalBackend.cc without acquiring the lock that
guards that field.
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
Step 1 of many, cleaning up the direct/auto client & restarting map
requests that leads to all the unnecessary map requests.
Updates tailscale/corp#5761
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
Regression from 09afb8e35b, in which the
same reflect.Value scratch value was being used as the map iterator
copy destination.
Also: make nil and empty maps hash differently, add test.
Fixes#4871
Co-authored-by: Josh Bleecher Snyder <josharian@gmail.com>
Change-Id: I67f42524bc81f694c1b7259d6682200125ea4a66
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
Otherwise we crash at startup with Go 1.19beta1.
Updates #4872
Change-Id: I371df4146735f7e066efd2edd48c1a305906c13d
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
Use the "tailscaled" prefix instead of "tsnet" for state file names:
1. It is consistent with the pre-existing {{Dir}}/tailscaled.state file.
2. It makes the file layout of `tsnet` and `tailscaled` identical,
so that they are compatible with each other.
Signed-off-by: Joe Tsai <joetsai@digital-static.net>
Start up a backend service, put a SOCKS5 server in front
of it, and verify that we can get data from the backend via
SOCKS5.
Signed-off-by: Denton Gentry <dgentry@tailscale.com>
In the 1.27 unstable releases we set the min-version to iOS15,
which means we have 50 MBytes of RAM in the Network Extension.
https://tailscale.com/blog/go-linker/
Include the UPnP/NAT-PMP/PCP portmapper support now that there
is memory for it.
Fixes https://github.com/tailscale/tailscale/issues/2495
Signed-off-by: Denton Gentry <dgentry@tailscale.com>
