1.7 KiB
sgp-internet-ping
A quick analysis of Internet latency from Singapore to the rest of the world.
Scanning the Internet
To scan the IPv4 Internet, I used the tool masscan by security researcher Robert Graham. He has extensively made use of masscan in the security research he does. It provides latency measurements up to the millisecond.
I wrote a configuration file to run masscan on the entire Internet with the included exclusion list, and scan the top 5 open ports according to speedguide.net. It is stored as scan.conf. I started the scan with:
masscan -c scan.conf
This produces the output file scan.bin.
Counting latency
I need to reduce the data for the five ports per host into a single latency reading for each host.
But first, I had to convert the scan binary into JSON:
masscan --readscan scan.bin -oJ scan.json
go run latency.go -in scan.json -out latency.json
Categorising readings by country
To associate an IP address with a country, a geolocation lookup database must be used. I used two sources of geolocation databases; Maxmind's GeoLite2, and Webnet77's IPToCountry; to test the accuracy of either database.
Next, I wrote and used a Go script to group the scans by country:
go run country.go -in latency.json -db geolite -out country.json
Plotting the latency from Singapore by country
Not implemented
I will start with a simple plot of latency to every country from Singapore.
go run json2csv.go -in country.json -out country.csv