byztimed | Byzantine-fault-tolerant time synchronization

by akamai-contrib Rust Version: Current License: Non-SPDX

X-Ray Key Features Code Snippets Community Discussions(10)Vulnerabilities Install Support

kandi X-RAY | byztimed Summary

byztimed is a Rust library typically used in Networking applications. byztimed has no bugs, it has no vulnerabilities and it has low support. However byztimed has a Non-SPDX License. You can download it from GitHub.

Although it is fundamentally a peer-to-peer protocol, Byztime uses a client-server communication pattern, with each node acting as both a client and a server to each other node. A client-only operation mode, wherein a node synchronizes itself to the consensus but does not vote in it, is also supported. Byztime uses Network Time Security (NTS) for cryptographic link protection. Communication from each client to each server begins by the client initiating a TLS handshake and then using NTS-KE to negotiate shared keys and obtain NTS cookies. After NTS-KE is complete, the TLS connection closes and the remainder of the protocol runs over UDP. NTS provides message-level authenticated encryption. It provides replay protection for the client, but not for the server. The server never updates any state in response to a message from a client, so processing replays is harmless. For the remainder of this overview, we'll take the abstraction of authenticated encryption for granted and omit NTS-related machinery from our descriptions. Each node is assumed to be equipped with a local clock which counts the time elapsed since some arbitrary epoch such as when the system last booted. One node's local clock has no a priori known relationship to another's. Rather, this relationship is discovered through the execution of the protocol. The shared time that nodes seek to synchronize to is called the global clock. Nodes maintain an estimate of their global offset, which is the difference between the global clock and their local clock. The local clock never receives any adjustments; only the global offset does. The protocol proceeds by each node periodically sending a query to each of its peers, and the peer sending a response which includes a snapshot of its local clock and its current estimate of its global offset. Each query/response volley is called a measurement.

Support

Quality

Security

License

Reuse

Support

byztimed has a low active ecosystem.

It has 30 star(s) with 0 fork(s). There are 3 watchers for this library.

It had no major release in the last 6 months.

byztimed has no issues reported. There are no pull requests.

It has a neutral sentiment in the developer community.

The latest version of byztimed is current.

Quality

byztimed has no bugs reported.

Security

byztimed has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

License

byztimed has a Non-SPDX License.

Non-SPDX licenses can be open source with a non SPDX compliant license, or non open source licenses, and you need to review them closely before use.

Reuse

byztimed releases are not available. You will need to build from source code and install.

Installation instructions, examples and code snippets are available.

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byztimed Key Features

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byztimed Examples and Code Snippets

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Community Discussions

Trending Discussions on Networking

Multicast being sent over hardware address of default gateway address instead of ethernet multicast address

How to extract street graph or network from OpenStreetMap?

Julia - not able to capture looped back UDP packets in Wireshark

In a vscode development container, is there a way to access the docker container from a different machine on the local network?

Floating IPs usage on Digital Ocean

How to create an edgelist from a dataframe (expand, group_by?)

Ubuntu16 LetsEncrypt R3 issue

Updated windows docker and now it doesn't work outside localhost

Networked aframe dynamic rooms not working with easy rtc

Return a list of mutual nodes between every pair of nodes in R

QUESTION

Multicast being sent over hardware address of default gateway address instead of ethernet multicast address

Asked 2022-Mar-10 at 14:07

I have this code to send multicast messages to a group. There are no errors while running the program but when I monitor packets in Wireshark the ethernet destination of my packets are of my default gateway instead of something like 01-00-5e-xx-xx-xx

The code:

...

ANSWER

Answered 2022-Mar-10 at 14:07

244.244.244.1 is not a valid multicast address.

Multicast address are in the range of 224.0.0.1 - 239.255.255.255. The address you're sending to is not in that range. So the outgoing MAC address is not a multicast MAC.

Change the destination IP to be in the range of multicast IP addresses and you'll see a proper multicast MAC address.

Source https://stackoverflow.com/questions/71419150

QUESTION

How to extract street graph or network from OpenStreetMap?

Asked 2022-Feb-17 at 16:03

How to extract street graph or network from OpenStreetMap ?

...

ANSWER

Answered 2022-Feb-17 at 15:56

Solutions:

There are many solutions to achieve this goal, I listed some of them below.

- Overpass-api

Overpass-api & overpass-turbo let you use overpass query language to collect ways and nodes of type highway for a city :

Source https://stackoverflow.com/questions/69174361

QUESTION

Julia - not able to capture looped back UDP packets in Wireshark

Asked 2022-Jan-14 at 08:46

I have a UDP sender program here:

...

ANSWER

Answered 2022-Jan-14 at 08:46

When I tried to change the destination ip address to 255.255.255.255 [broadcasting?]

Source https://stackoverflow.com/questions/70694929

QUESTION

In a vscode development container, is there a way to access the docker container from a different machine on the local network?

Asked 2022-Jan-01 at 05:35

I have an app (sveltekit) running inside and would like to access it from other devices on my local network.

I can access it normally from the host machine on localhost:3000.

I want to access it somehow from another machine on the local network. Is this possible? Sveltekit cli has --host flag, which outputs the following:

...

ANSWER

Answered 2022-Jan-01 at 05:35

All that was needed was to change the following VSCode setting. By default it was set to "localhost". Setting it to "allInterfaces" grants access to other devices on the local network.

Source https://stackoverflow.com/questions/70523216

QUESTION

Floating IPs usage on Digital Ocean

Asked 2021-Nov-27 at 00:12

I am looking for a basic thing yet I have not found not even a single good documentation on getting it done.

I want to allocate a floating IP, then associate it to a network interface of a droplet other than eth0. The reason is I want to have the ability to very easily switch from one IP to the other with a programming language.

In a few words, I want to be able to do these two commands and both should provide a different response.

...

ANSWER

Answered 2021-Nov-27 at 00:12

In the cloud (AWS. GCP etc.) ARP is emulated by the virtual network layer, meaning that only IPs assigned to VMs by the cloud platform can be resolved. Most of the L2 failover protocols do break for that reason. Even if ARP worked,the IP allocation process for these IPs (often called “floating IPs”) would not integrate with the virtual network in a standard way, so your OS can't just "grab" the IP using ARP and route the packets to itself.

I have not personally done this on Digital Ocean, but I assume that you can call the cloud's proprietary API to do this functionality if you would like to go this route.

See this link on GCP about floating IPs and their implementation. Hope this is helpful.

Here's an idea that needs to be tested:

Let's say you have Node1(10.1.1.1/24) and Node2(10.1.1.2/24)
Create a loopback interface on both VMs and set the same IP address for both like (10.2.1.1/32)
Start a heartbeat send/receive between them
When NodeA starts it automatically makes an API call to create a route for 10.2.1.1/32 and points to itself with preference 2
When NodeB starts it automatically makes an API call to create a route for 10.2.1.1/32 and points to itself with preference 1
The nodes could monitor each other to withdraw the static routes if the other fails. Ideally you would need a 3rd node to reach quorum and prevent split brain scenarios, but you get the idea right?

Source https://stackoverflow.com/questions/69919561

QUESTION

How to create an edgelist from a dataframe (expand, group_by?)

Asked 2021-Oct-23 at 14:32

I have a dataframe in R similar to the following:

...

ANSWER

Answered 2021-Sep-14 at 04:44

I really love a base R solution, so that's what you'll get from me. It's a bit hacky and ad hoc but it seems to get the job done pretty quickly.

Source https://stackoverflow.com/questions/69171494

QUESTION

Ubuntu16 LetsEncrypt R3 issue

Asked 2021-Sep-30 at 22:32

I've been trying to wrap my head around this issue all day, could someone help resolve or at least explain it as if I'm a child?

I have an Ubuntu 16 server, running openssl 1.1, & letsencrypt

R3 support expired last night and now an application doesn't work on all devices because it's intermediate signature is from R3 ?

I've removed the X3 from my cert chain providers and generated fresh SSLs with letsencrypt but it has not solved the issue.

...

ANSWER

Answered 2021-Sep-30 at 22:32

Okay, what I did was to use this config in getssl.cfg

Source https://stackoverflow.com/questions/69394817

QUESTION

Updated windows docker and now it doesn't work outside localhost

Asked 2021-Sep-23 at 10:38

I have been running a media cluster for sometime without any issues. I have everything networked into two different docker networks... the first network just bridges the docker instance to the local machine, the second network is a docker VPN container that I use for the other media services (an earlier version of what I am working on can be found here: https://github.com/Xander-Rudolph/MediaDocker)

The strangest thing happened today though. I ran the docker update for windows and now docker spools up without any errors or issues, however none of the services work outside of the machine running docker. Usually I have a poke through for a couple of the services in my router (namely wordpress/joomla which is on the bridge) and they work outside of my local network, but none of them are working anymore. I was able to confirm its not the DNS A record because I'm able to use the RDP ports I have mapped for my router, and when I test on another machine in the same network, it can't access the services via the internal IP (but it can RDP).

Anyone have any idea what could have changed to break this? I've already updated all my docker images and even rebuilt my VPN container (before I realized its a networking issue). What are some steps I can do to try to troubleshoot what is going wrong in docker to prevent access outside of localhost?

Update

I've been able to rule out the docker update as the root cause... I upgraded docker on my laptop (which was previously running the same version as my desktop) and its not having the same issue... this configuration must be localized to this desktop... No idea what the issue is... Will try a linux VM on the desktop instead of docker for windows...

Update 2

After a lot of screwing around in both a VM and in WSL, I'm still only able to access the docker services from localhost but not a different machine on my network or via the IP on the host machine (perhaps something similar to this: Can't access localhost via IP address). RDP does work so the computer is accessible but the services are not.

I'm not sure if this is a result of a docker networking config or a windows network config (I'm using WSL with docker installed on ubuntu 20.08) but I'm not seeing anything stick out. I'm going to remove the tag for docker windows but this is definitely an issue with networking and I suspect it has something to do with the fact that the containers are running behind a VPN... although I don't know why I would be able to access them on localhost but not the IP on another VM...

When I run

...

ANSWER

Answered 2021-Sep-21 at 02:43

Your question: "...What are some steps I can do to try to troubleshoot what is going wrong in docker to prevent access outside of localhost?..."

Troubleshooting help for you, first do you have multiple networking adapters (Ethernet, Wi-Fi, etc.) present on the host. First ensure, the priority of these adapters needs to be configured in correct order so the Windows networking stack can correctly choose gateway routes.

Now, to fix this set your primary internet-connected networking adapter to have the lowest InterfaceMetric value, use can use these Powershell commands from an elevated console:

Source https://stackoverflow.com/questions/69111163

QUESTION

Networked aframe dynamic rooms not working with easy rtc

Asked 2021-Sep-17 at 15:17

Issue

Hi, I've remixed a template for networked aframe dynamic rooms using a form:

https://glitch.com/edit/#!/power-lily-pancake?path=public%2Fscene.html%3A41%3A0

For some reason whenever I add these lines of code to the tag, the entire project breaks:

...

ANSWER

Answered 2021-Sep-17 at 15:17

afaik the dynamic-room component is designed to attach the networked-scene, not update it (since it doesn't handle updates). That's why the dynamic-room example scene does only have a dynamic-room component, and also why the dynamic-room is not working with networked-scene.

I'd throw all the networked-scene attributes to the dynamic-room setup, but it's also possible to make the two work together pretty much like you want it:

Source https://stackoverflow.com/questions/69138587

QUESTION

Return a list of mutual nodes between every pair of nodes in R

Asked 2021-Sep-10 at 20:25

I want to obtain a list of mutually connected nodes between every pair of nodes in my graph:

...

ANSWER

Answered 2021-Sep-10 at 19:00

This is not exactly efficient, it's a brute force double loop, but you can do

Source https://stackoverflow.com/questions/69127621

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install byztimed

Byztime is built like any standard Rust crate. The easiest way to install byztimed is to get it from crates.io via cargo:. If you prefer to check out and build this repo, note that byztimed includes libbyztime as a submodule, so be sure to clone with git clone --recurse-submodules, or run git submodule update --init --recursive if you have already cloned without the --recurse-submodules option. Byztime is tested against Rust's stable channel, but compilers significantly older than the current stable will probably work. The most recent version known not to work is 1.38 (because we rely on async/await, which stabilized in 1.39). Byztimed currently runs only on Linux, and is well-tested only on AMD64. Other CPU architectures should work; please file a bug ticket if you encounter any issues. We hope to eventually support more operating systems, but this will be an uphill battle because Byztime depends on timekeeping facilities that currently only Linux provides. The effort to improve portability will likely require contributing some new functionality to other OS kernels.

Support

For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .

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