domukas@olefm.dev:~$ ./fieldkit

FIELDKIT

the network / windows / server engineer's bench · built for domukas2 · tap a tool to open it

ip via ping

Your connection

everything this server can tell about you
reading…

Round trip · live

websocket echo · latency and jitter over time
last best avg jitter

Speed & bufferbloat

throughput + the A–F latency-under-load grade

Throughput is easy. The number that matters is how much your latency swells when the pipe is saturated — that's bufferbloat, and it's what ruins calls and RDP sessions on "fast" lines.

download mbit/s
upload mbit/s
idle latency
bufferbloat

Reverse traceroute

the road from this server back to you, on a map

Every router your packets pass on the way back from this server to you. You always see the road out; this is the road home.

Subnet calculator

IPv4 CIDR · runs in your browser

DNS lookup

DNS-over-HTTPS, straight from your browser

Whois

RDAP first, port-43 fallback — .lt and .eu welcome

TLS inspector

cert, chain trust, protocol & key — any public host, any port

Email auth · SPF / DKIM / DMARC

is this domain's mail protected against spoofing?