58 lines
2.0 KiB
Markdown
58 lines
2.0 KiB
Markdown
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<h1 align="center">
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sgp-internet-ping
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</h1>
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<p align="center">
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A quick analysis of Internet latency from Singapore to the rest of the world.
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</p>
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<p align="center">
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<img src="poster.png" alt="poster">
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</p>
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## Scanning the Internet
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To scan the IPv4 Internet, I used the tool [`masscan`](https://github.com/robertdavidgraham/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.
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> WARNING: Only scan the Internet if your service provider approves of it. It can cause networking issues.
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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](https://www.speedguide.net/ports_common.php). It is stored as `scan.conf`. I started the scan with:
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```
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masscan -c scan.conf
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```
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This produces the output file `scan.bin`. You might want to make use of shards to scan only a portion of the internet per file as scanning the entire internet will produce a huge file that cannot be parsed unless you have enough RAM available.
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## Counting latency
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I need to reduce the data for the five ports per host into a single latency reading for each host.
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But first, I had to convert the scan binary into JSON:
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```
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masscan --readscan scan.bin -oJ scan.json
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go run latency.go -in scan.json -out latency.json
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```
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## Categorising readings by country
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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.
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Next, I wrote and used a Go script to group the scans by country:
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```
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go run country.go -in latency.json -db iptocountry -out country.json
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```
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## Plotting the latency from Singapore by country
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I will start with a simple plot of latency to every country from Singapore.
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```
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go run boxplot.go -in country.json -out boxplot.csv
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```
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##
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