What network diagnostics are available?
HTTP, DNS, TCP, IP, interfaces, geolocation and TLS checks are separate focused modules.
HTTP
ping provides compact HTTP status, timing and redirect information. curl provides full request methods, headers, authentication, body submission and file saving.
Name and transport
dns resolves record types, tcp checks a port and optional TLS, ip classifies addresses and net inspects interfaces visible to PHP.
TLS
cert inspects remote certificates and supports controlled local certificate, key, CSR and PKCS#12 work through OpenSSL.