Summary
pingのHTTP版, DNS版, SMTP版GitHub - flok99 / httping
https://github.com/flok99/httping
GitHub - farrokhi / dnsdlag
https://github.com/farrokhi/dnsdiag
GitHub - halonsecurity / smtpping
https://github.com/halonsecurity/smtpping
via
POSTD - 2016-06-01 - Pingの発展版 : httping, dnsping, smtppinghttp://postd.cc/advanced-ping-httping-dnsping-smtpping/