livecode is a R package for broadcasting code for live code demonstrations. I would like to use it for teaching R in online classrooms. The package can be installed from github and runs excellent on my computer and the result is very promising. Once installed from github:
remotes::install_github("rundel/livecode")
library(livecode)
You can start your web server via server = livecode::serve_file(). Next your browser pops up and shows you a syntax-hightlighted live broadcast of your coding. A benefit in comparison to a screenshare of code is that this broadcast delivers plain text which is scalable from the recipient. I tested it on my phone, worked great. No more scaling of RStudio in order to make people see your code. Furthermore text (the script) can be saved from browser.
https://www.rstudio.com/resources/rstudioconf-2020/livecode-broadcast-your-live-coding-sessions-from-and-to-rstudio/
My problem is, I cannot figure out how to configure my private work environment such that this broadcast can be received from outside my local network. serve_file can specify an ip and port. I tried to set it to my computer ip (found via ipconfig) and open port 80 (for http) in my router.
Can anybody support me in how to make a livecode broadcast to the global internet?
I contacted the package author and he suggested to follow this blogpost:
https://bitsandbricks.github.io/post/code-live-from-rstudio-and-share-it-with-the-world-in-real-time/
It suggests to use ngrok, a service that provides tunnels to localhost. This acutally worked for me for some seconds, killing my livecode package in the next moment. At the moment, I can no longer use livecode not even as a localhost. I assume this error may just be my fault. The blogpost provides an easy answer to my question.
Related
I am looking for a way to programmatically get the name of the vendor that owns a MAC address within a block/range that they purchased. Preferably by querying some API or database, language agnostic. Or if there is some other way that applications do it that I am unaware of.
For example, running nmap -sn 192.168.1.0/24 with root privileges yields
...
Nmap scan report for 192.168.1.111
Host is up (0.35s latency).
MAC Address: B8:27:EB:96:E0:0E (Raspberry Pi Foundation)
...
... and that tells me that the Raspberry Pi Foundation "owns" that MAC Address, within the prefix range that they own: B8:27:EB.
However, I am not sure how nmap knows this, nor how I could find this out myself. Parsing nmap output is not an ideal solution for me. Here's what I found from digging online:
This stackoverflow question references a site that appears to do this, however it appears to not have been updated since 2013, nor does it expose any API endpoints. Most notably, it does not have the newer block of MAC Addresses that the Raspberry Pi Foundation reserved for their newer models (under Raspberry Pi Team, or something along those lines).
I found that the IEEE handles these registrations through their site, however it appears to be for their customers and I could not find an exposed endpoint for their search function.
On that same IEEE page linked above, it looks like I can get a CSV file of their entire database. However that seems large, and would have to be actively kept up-to-date. Does nmap come with an updated database generated from those files locally?
If a public-facing API like I'm envisioning doesn't exist, I'll make one myself for fun. I'd first like to know if I'm thinking about this wrong and if there is an official, "canonical" way that I have not found. Any help would be appreciated, and thank you.
The maintainers of nmap keep a list of prefixes as part of the tool. You can see it here:
https://github.com/nmap/nmap/blob/master/nmap-mac-prefixes
They keep this up to date by periodically importing the public registry on this site:
https://regauth.standards.ieee.org/standards-ra-web/pub/view.html#registries
Note that those files are rate-limited so you should not be querying those csv files ad hoc as part of a software package; rather you should do what nmap does and keep an internal list that you synchronize periodically.
I'm not aware of a publicly available tool to query them as an API; however, creating one that works the same way that nmap does would be fairly trivial. nmap does not update that file more than once or twice a year which makes me suspect that the list doesn't significantly change often enough that keeping your own list would be too onerous (you could even download nmap's list every so often).
I am working for a company that is providing File-Share-Software for all sorts of Protocols such as FTP, SFTP, FTPS and so on. One of our customers is facing an issue with Key-Auth and spontaneously login-problems.
Going trough the code I am pretty certain that the server collapses with too many requests at the same time. What I need right now is a simple tool to test a situation just like this. I need a simple SFTP-Fuzzer or Stresser, sending invalid or broken Auth-Attempts to the SFTP-Server.
I am not a developer but a technician and instead of writing something myself (which would take forever) I would love to have a simple script or toolset to go...if there is one.
Ok, found one faster than I thought.
Steps:
Download Kali Linux (or any Distro that contains Metasploit)
Fire up Kali Linux and put it in the same subnet as your SFTP-Server
Start Metasploit and use the SSH-Fuzzer /auxiliary/fuzzer/ssh/ssh_version_2
Set RHOST and RPORT to the relevant IP and port your server is listening to
Exploit and see what will happen
OS : Ubuntu 14.04
ion : 3.2.2
In my current setup, I am using gstreamer utility to stream live video.
The system has Ip address of 192.168.58.10( say for example). I am streaming it to another machine say 192.168.58.12 port 5000.
From 2nd machine I want to use Ion-dtn to stream it to different endpoints. I am completely clueless how to proceed.
I have done bit of research and found that bssStreamingApp utility and bsspadmin can do it but I failed to find any examples. Can some one please advice me. Earlier I have integrated bpsource in my application to send messages or text stream and it was quite successful.
Thanks in advance for help or any criticism
i want to read MAC address of machine from Adobe AIR. I am using flex 3 and AIR 2.
how can i do this
the main purpose is i want to install that product in only one machine
var ni:NetworkInfo = NetworkInfo.networkInfo;
var interfaceVector:Vector.<NetworkInterface> = ni.findInterfaces();
Taken from the Network Info sample in the desktop version of Tour de Flex.
As far as I can tell, you cannot do it with Flex/AIR alone - you can however use the NativeProcess API to communicate with a Java/C program that can do this for you.
If you want to limit your application to just one machine, why don't you just install it manually without giving away the setup file - is it a remote machine? Even in that case you should be able to do a remote installation, right?
The answer "track the combination of IP address and user ID" won't satisfy my (very similar) needs. If the (laptop) computer is moved across WiFi domains, its IP address will change. If the computer is on a commerical IP provider, the IP address can often change without warning or notice.
My users don't want to deal with such problems. They don't even want to know that these problems exist!
The binding of MAC address and user ID can be done at installation time. It's not perfect, but it's pretty good.
Of course what we need is an implementation of public-private key...
Oz
I am presently running several websites and a mail server from my home network. I have a business DSL account with 8 public IP addresses (1 by itself, and 7 in a block). To handle routing/firewall/gateway, I am presently using RRAS, DNS, & DHCP from Windows 2003 running on a ancient (circa 2001) PC -- which I suspect is going to fail any time now.
What I would like to do is replace that with a simple router. Have a consumer model LinkSys Wifi-router, which I'm presently just using as an access point (don't have the model number handy, but it's one of their standard models). It seems to be able to handle all the NAT/firewall/DHCP tasks -- except for handling routing the multiple public addresses. (e.g., I need x.x.x.123, port 21 getting to one machine, but port 80 of x.x.x.123 & x.x.x.124 to going to another, and x.x.x.123, port 5000 to still another etc).
So my questions are:
Can this be done with standard Linksys router, which they just don't explain in the consumer manual?
Can this be done ... if I replace the firmware with a community/OS version (and if so, which one?)
If neither of the above, can someone recommend a profession router (preferably with wifi) that does do this, which is close to a consumer level price point.
Alternately, is there a reliable OS/3rd party replacement to RRAS which handles this (since RRAS is the part causing the most trouble)
Alternate-Alternately, can someone point to a VERY simple HOWTO to doing this (ie. follow these steps and forget about it), to installing a LINUX system to do this) (since I assume I can run Linux longer on the old machine)?
This can't be done on a Linksys router with stock firmware. It can be done if you load a third-party firmware, but there's no GUI (afaik) to accomplish it, so you'll be hacking system shell scripts which is pretty hairy. I would recommend getting a low-power or older PC and installing PFSense.
PFSense is an open-source router appliance OS distribution with a very easy to use web front end.
Install DD-wrt On your linksys box. I believe this will have everything you need link text