natck's (nat-check's) purpose is a utility for measuring the number of concurrent connections a NAT will allow, most useful for NATs outside of your control, like CGNAT. The connections aim to look like real traffic to avoid dropping or quick timeouts to get an accurate measurement.
- Uses realistic "looking" http traffic.
- Maximises the variability of crawled sites.
- Dynamically discovers new hosts to crawl.
- Respects servers via robots.txt and HTTP 429 rate-limit.
The natck utility accepts a list of urls for the remote servers. For the best experience, specify a list of 10+ urls.
example1.com
example2.com
Once the url list is assembled it can be piped to natck like
cat url-list.txt | ./natck
The natck utility bootstraps itself from the input list of urls, dynamically finding new hosts. For this reason, natck can be started from a single url but will finish much faster when passed a larger number of urls.
Use the usual golang tools like
go build
and
go run
Before submitting any patches, please run go fmt and go vet over each commit. Feel free to open a discussion to communicate any feature ideas if you're unsure how to implement or fit it into the surrounding code.
natck is licensed under GPLv2.