jm + ping   6

RIPE Atlas Probes
Interesting! We discussed similar ideas in $prevjob, good to see one hitting production globally.
RIPE Atlas probes form the backbone of the RIPE Atlas infrastructure. Volunteers all over the world host these small hardware devices that actively measure Internet connectivity through ping, traceroute, DNS, SSL/TLS, NTP and HTTP measurements. This data is collected and aggregated by the RIPE NCC, which makes the data publicly available. Network operators, engineers, researchers and even home users have used this data for a wide range of purposes, from investigating network outages to DNS anycasting to testing IPv6 connectivity.

Anyone can apply to host a RIPE Atlas probe. If your application is successful (based on your location), we will ship you a probe free of charge. Hosts simply need to plug their probe into their home (or other) network.

Probes are USB-powered and are connected to an Ethernet port on the host’s router or switch. They then automatically and continuously perform active measurements about the Internet’s connectivity, and this data is sent to the RIPE NCC, where it is aggregated and made publicly available. We also use this data to create several Internet maps and data visualisations. [....]

The hardware of the first and second generation probes is a Lantronix XPort Pro module with custom powering and housing built around it. The third generation probe is a modified TP-Link wireless router (model TL-MR 3020) with a small USB thumb drive in it, but this probe does not support WiFi.


(via irldexter)
via:irldexter  ripe  ncc  probing  active-monitoring  networking  ping  traceroute  dns  testing  http  ipv6  anycast  hardware  devices  isps 
june 2017 by jm
League of Legends win-rates vs latency analysed
It appears that more mechanically intensive champions are more affected by latency, while tankier champions or those with point-and-click abilities are less affected by latency.


(via Nelson)
games  league-of-legends  latency  ping  gaming  internet  via:nelson 
december 2015 by jm
Combining static model checking with dynamic enforcement using the Statecall Policy Language
This looks quite nice -- a model-checker "for regular programmers". Example model for ping(1):

<pre>01 automaton ping (int max_count, int count, bool can_timeout) {
02 Initialize;
03 during {
04 count = 0;
05 do {
06 Transmit_Ping;
07 either {
08 Receive_Ping;
09 } or (can_timeout) {
10 Timeout_Ping;
11 };
12 count = count + 1;
13 } until (count &gt;= max_count);
14 } handle {
15 SIGINFO;
16 Print_Summary;
17 };</pre>
ping  model-checking  models  formal-methods  verification  static  dynamic  coding  debugging  testing  distcomp  papers 
march 2015 by jm
Belkin Router Apocalypse
Many Belkin routers attempt to determine if they're connected to the internet by pinging 'heartbeat.belkin.com', in a classic amateur fail move. Good reason not to run Belkin firmware if that's the level of code quality to expect
belkin  fail  ping  icmp  funny  internet  dailywtf  broken 
october 2014 by jm

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