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ZeroTier 1.1.0 introduces a number of fixes and improvements in several areas.
We incremented the secondary version to indicate the significance of this release.
Version numbering has been a bit ad-hoc in the past. In future versions we will
adopt the following scheme: odd-numbered revision numbers like 1.1.1 will indicate
development versions, while even numbered ones like 1.1.2 will indicate tagged
releases. The public git repo branching has also been revised: master will always
be the latest tagged release, dev will be usually-working development, and edge
will host maybe-broken "bleeding edge" development. Pull requests on GitHub should
generally be made against dev, not master or edge. Other branches that may appear
from time to time may be feature or experimental branches. Only master is confirmed
good, with dev usually being okay but not guaranteed to be such. (To the extent
that any software is ever guaranteed to be anything.)
Change summary:
User-facing changes and improvements:
- Windows now has a new .NET-based native UI, which replaces the old WebControl
wrapper around the React UI. This just didn't work well on older Windows systems,
and we did not want to bundle 40+ megabytes of web browser with our app just for
its very simple UI.
- The web UI (still used for Mac and usable in Linux as well) is updated with
improved look and simplifications.
- Both UIs no longer have the "Peers" tab, since several users reported that non-
technical users found this confusing and even alarming (does this mean people
can access my system?). This information is visibile with "listpeers" from the
command line (zerotier-cli).
New features:
- Virtual networks that use our RFC4193-based IPv6 numbering scheme now emulate
IPv6 NDP for queries that target these addresses within the same network. This
allows for faster multicast-free connection init and improved security since
the address is now hard-wired to the device ID (which is a crypto token). This
does not affect IPv6 NDP for other IPv6 addresses or link-local, which will
continue to work normally. This also opens the potential for a reduced footprint
multicast-free build for embedded applications.
- This version includes beta support for a feature called CIRCUIT_TEST. Network
controllers for networks you have joined can now send a special message called
CIRCUIT_TEST which allows for ZeroTier-layer link testing and remote diagnosis
of link issues. Any operator of a network controller can do this; more
documentation will be forthcoming. The only information that may be gathered
in this way is IP addressing info and very basic system info (OS, 32/64 bit,
ZeroTier version). No personal information, hard drive data, location, or other
private info is available. This can only be ordered by a controller of a network
you have joined and is secured using cryptographic signatures.
- This version includes an alpha version of clustering a.k.a. multi-homing! This
powerful feature allows for a single ZeroTier device to be run from multiple
endpoints, with connecting peers being handed off to endpoints that are closer
via GeoIP lookup and/or are more lightly loaded. Currently this is only suitable
for use in our soon-to-be-upgraded root server infrastructure (details will be
blogged soon), but in the future it will be capable of hosting multi-homed
devices on user networks. This will allow things like (for example) a geo-
clustered Cassandra server that appears behind a single IP on a virtual LAN.
This feature must be enabled with the ZT_ENABLE_CLUSTER=1 build option.
Bug fixes and other improvements (including performance!):
- A faster version of the Poly1305 cryptographic MAC function was substituted
for sometimes greatly improved performance.
- C++ STL std::map was replaced throughout the entire core with a hand-rolled
Hashtable implementation for improved performance and in some cases a reduced
memory footprint. Some maps are still used in peripheral code that is not
performance critical or where ordered keys are needed.
- The zerotier-cli and zerotier-idtool symbolic links are now created in
/usr/local/bin on OSX to comply with El Capitan file security restrictions.
- The OSX tap device driver has been updated. This update may fix issues that
some users have reported with bridging on OSX. This new tap device driver
drops 32-bit support, but if you have a 32-bit system you can manually install
the old driver from ext/bin/tap-mac.
- Mac users could experience a problem with the UI if they installed ZeroTier,
then uninstalled it, then installed again. This is now fixed.
- UPnP port mappings should work better on some routers, and a different local
port is now used for UPnP mapped traffic vs. NAT-t'd traffic to get around
a bug in several popular mid-tier routers where using UPnP mapping alongside
traditional NAT traversal made a port unreachable.
- Debian package now builds with the right arch label on armv7l systems (Pi 2)
- The old "root topology" has been replaced with a similar but better thought
out concept called a World. The World defines the root servers and possibly
in the future other things, and can be updated in-band from trusted peers
allowing for software-upgrade-free network upgrades to keep up with growing
demand. See node/World.hpp for details.
- A fix was made to "self-awareness," which keeps track of your external IP
info and adapts to changes, to eliminate a problem that could cause "link
thrashing" behind some symmetric NATs.
- Escalating UDP TTLs was re-introduced to better transit some port-restricted
cone NATs such as Linux IP MASQ (used for Docker).
- An otherwise harmless crash-on-exit bug in the network controller was fixed.
- All new direct links are now confirmed in both directions. This adds a very
small amount of initial HELLO/OK traffic but fixes some edge cases where an
incomplete or unidirectional path might be used.
- [SECURITY] Better rate limiting was put in place for VERB_PUSH_DIRECT_PATHS
to prevent potential abuse for amplification attacks.
- [SECURITY] Build flags were tweaked on OSX to ensure that all code including
dependency libraries are built with full stack canary protection and ASLR
support.
Visit https://www.zerotier.com/blog or follow @ZeroTier on Twitter for updates
and announcements!
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not it can be easily installed. This is mostly an issue on old Windows Server systems, and in that case the admin will likely want to decide how to proceed.
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have it build with the rest of the code.
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runs if .NET 4.5 is not present... because yes we have to install Microsoft's own flagship runtime under some conditions. (Rare, but present.)
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as per El Capitan requirements.
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load in Windows 2008 Server and Windows Vista. Still issues with those platforms, but driver loads -- and shouldn't hurt newer versions (will test).
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Shouldn't be needed but seems to help on Windows 8.
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including automatic driver update from NDIS5 to NDIS6. Also a bit more robust on creating new ports, just in case.
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reassigned on device "power cycle."
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setupapi and using these functions directly.
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restart problem. Installer probably should NOT mess with the running service, since Linux servers are likely to be production.
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problem. Have to test a bit more.
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and clean up service start/stop in installer.
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configure firewall rules (because we can now).
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