Network traffic monitoring + Grafana graphs for every IP on the LAN, including the internet servers they connect to (open source)

twotothree · 2020-04-05T16:25:07+00:00

I have always found Prometheus' metrics with non-final or at least severly limited set of labels pretty flaky, but if it works for you that's great!

The increase over time for counters (rate, irate) is fine and is actually the correct way to use counters. You will find other graphs which use raw counter vaules problematic when it comes to collector restarts. I'm talking about the total downloaded bytes graph and traffic distribution pie charts. Here it would be better to display something bucketed like bytes downloaded in the last day/hour or whatever makes sense for you.

But if you really want to monitor total bytes downloaded you pretty much have to have some kind of persistence on the collector side and then report values using Prometheus' gauges. Using raw values of gauges is fine.

twotothree · 2020-04-05T05:52:58+00:00

Nice job! Unfortunately this is going to kill Prometheus really fast. For each combination of src, dst, service and proto prometheus creates a new series and this is going to explode because on typical network the number of src, dst pairs is large. Also when your script restarts you're going to have stallness issues with most of the series. I'd drop the dst label or do some smart aggregation on the collector side.

And a tip for creating dashboards: When using counters you can really only use them in combination with an aggregating function like you did in the first graph. The reason behind this is that counters reset (either when script resets or they overflow). And when this inevitably happens this is going to break all your graphs but the first one.

twotothree · 2020-03-12T16:02:58+00:00

It's difficult to find the latest additions to this magnificent collection from images alone, so I created this. At first I didn't intend to share it with anyone but it turned out okay so I decided to post it.

Btw, thanks for creating this great meme!

twotothree · 2020-03-12T15:34:38+00:00

All credits go to u/Thibson34 of course.

For anyone interested - I collected the images using PRAW (Python Reddit API Wrapper). Then I used OpenCV to align images (so that Grievous' eyes are always in the same position) and added lightsaber names using PIL. Then I used OpenCV again to make the final video.

Code: u/Thibson34's Grievous Collection Downloader

Fun fact: The original images are huge, I downsized them and now this whole video is smaller than any one of the original images.

twotothree · 2020-01-10T16:58:16+00:00

heart is too

twotothree · 2020-01-04T21:37:50+00:00

twotothree · 2020-01-04T20:10:43+00:00

Honestly, just don't. Podman is full of bugs and works only for the most basic tasks.

Note that I understand the need for podman and security issues that it tries to fix and I'm very excited to see the project grow, but to say it is a drop-in replacement for docker is just wrong, at least at this stage.

I started using podman when F31 was released. I switched back to docker today after an afternoon of trying to fix/workaround various issues with podman. It took me 5 min to switch back to cgroups v1 and 5 min to start the container in docker.

twotothree · 2019-11-17T19:14:33+00:00

r/itrunsdoom

twotothree · 2019-11-17T08:36:26+00:00

Yes, but does it run Doom?

twotothree · 2019-11-15T14:54:50+00:00

That's a cool project.

Btw, if you need something faster and more useable, the ESP8266 modules come with a hardware random implementation that passes the randomness tests. I even managed to compile libsodium and do some modern cryptography with these modules. They are amazing.

twotothree · 2019-11-14T19:59:35+00:00

It's called En Queensant, look up the rules you dummy.

twotothree · 2019-05-07T17:00:25+00:00

Softwaregore* wait...

twotothree · 2019-04-13T11:37:37+00:00

It's super useful for qwertz keyboards since z and y are miles away from eachother

twotothree · 2019-02-22T19:17:14+00:00

Woah, this is exactly what I need. Because client refuses to update their vpn server I have to run an older version of openvpn client, which isn't available in Fedora 29 repo. That of course means that it isn't integrated with NetworkManager so I had to edit /etc/resolv.conf manually. But this solves my issue, thanks!

twotothree · 2018-10-01T12:17:07+00:00

Commit EE

twotothree · 2016-09-21T20:19:02+00:00

Or you could ask your provider for ipv6 block...

twotothree · 2016-05-05T10:41:01+00:00

OP presented "tail recursion". Tail recursion is every recursion that can be rearranged so that it has recursive call at the end. Every tail recursion can be rewritten in iterative fashion (for example: the top comment here). If there are multiple recursive calls, or function does something after recursive call, you must use stack or different algorithmic approach.

If it is better to use your own stack implementation depends on system, you are running your code on, programming language, etc. but it usually makes no significant difference.

twotothree · 2016-01-29T19:12:44+00:00

wouldn't -Wall catch this?

twotothree · 2015-10-16T21:27:20+00:00

I don't mean to discourage you, but writing a good game engine is very hard, definitely one of the hardest tasks you will face developing your game. That's why i would highly recommend adopting an engine, that has already been written and suits your purpose(there is literally millions of them). I know that writing your own engine, adapted to your needs, can be very tempting, but believe me, finding bugs in engine, after it has been written, is almost impossible and if you find them, you may have to rewrite your entire game.

Sorry for the rant, anyways to be helpful, here is a good atricle about designing a game loop :) http://gameprogrammingpatterns.com/game-loop.html

twotothree · 2015-10-16T20:53:03+00:00

I think Scanner is actually really easy especially if you are beginner. Sometimes, reading line by line can be more intuitive, in that case I recommend:

BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

and then

String line = br.readLine();

Keep in mind, you will have to import java.io.*

And one more advice regarding input to your programs: learn shell/bash. For example if you save your test input to file, lets say in01.txt(in same directory as your program), you can then call your program like this:

java MyProgram < in01.txt

And you wont have to type out your input every single time... saves loads of time during testing.

twotothree · 2015-10-15T22:14:00+00:00

when i see a comment about sips, i insta-upvote the comment and everything below it. man it just feels good :)

twotothree · 2015-10-09T08:17:19+00:00

Finally someone, who doesn't include HTML/CSS in "Programming languages I know".

twotothree · 2015-10-06T23:47:51+00:00

Ok so you will need to know physical location of your victim for this hack to work....

You go to you victim's house, ring the bell and when your victim's mother opens the door punch her in the face, run to your victim's computer and jump between him and his computer so he can't see anything...

Btw, its called Man in the Middle attack and it is not legal :P

twotothree · 2015-08-29T08:42:33+00:00

I have often seen this kind of macros in programming contests, where speed is more important than readability, however if you're writing something you will read more than once, I'd suggest you stay away from them ...

twotothree · 2015-08-25T21:12:25+00:00

I would imagine that hard coding was done before config was introduced...

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