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PROTOCALL TOOLS / 05 / NETWORK & OPC UA

Give OT and IT
the same answer.

Make the subnet, packed IP, endpoint and certificate identity explicit before a commissioning problem turns into a round of screenshots.

01 / IPV4 RANGE PLANNER

Plan the address. See the boundary.

Calculate network identity, usable range and gateway membership without an online lookup. The same address also gives the packed hexadecimal form used by many PLC function blocks.

This is a planning calculator. Confirm VLAN, routing and Windows firewall policy separately.

02 / OPC UA ENDPOINT & CERTIFICATE DOCTOR

Trust is more than a TCP port.

Read a public X.509 application certificate locally, compare the endpoint host against DNS/IP SANs and compare an application URI against URI SANs. It cannot prove a trust-store decision or an actual connection.

Endpoint claim

Load only a public certificate. This tool never asks for or handles a private key.

Load a public PEM or DER certificate to examine it locally.

ENDPOINT INTERPRETATION192.168.1.10:4840
Endpoint host SAN matchAwaiting certificate
Application URI SAN matchNOT CHECKED
  • Load a PEM/DER application certificate to compare its Subject Alternative Names.