Software Toolbox Technical Blog

Understanding OPC UA Certificates and Certificate Authorities

5 min read

By Zachary Parham on Jul 14, 2022 2:00:00 PM


If you use OPC UA, you are likely at least somewhat familiar with OPC UA certificates. OPC UA client and server applications typically have Application Instance Certificates to provide application-level security. They are used for establishing a secure connection using Asymmetric Cryptography.

OPC UA certificates include a digital signature by the generator of the certificate. This digital signature can be self-signed or can be signed by a Certificate Authority (CA). Both types of certificates provide the same level of security and can be used in Asymmetric Cryptography. The major difference between CA signed and self-signed certificates in an OPC UA installation is the effort required to deploy and maintain the certificates. The choice of when to use a CA issued certificate versus a self-signed certificate depends on the installation and site requirements.

Many of our products leverage the OPC UA Configuration tool from the OPC Foundation to create and trust certificates and certificate authorities (CA). This tool actually installs with our OPC Data Client toolkit but is also available from the OPC Foundation. But how do we navigate this tool and the use of OPC UA certificates as a whole?

In this blog post, we will cover both methods of UA certificate signing, as well as the tool mentioned above for easily managing UA certificates for your OPC UA applications.

Continue Reading

Tech Support Corner: How to Script Wireshark Capture

5 min read

By Rodrigo Restrepo on May 19, 2022 2:00:00 PM


As you may be aware, Wireshark is an incredibly useful freeware tool for capturing network traffic on a computer. Our support engineers find it to be invaluable for troubleshooting Ethernet communications issues, as it provides visibility into more than just the protocol data packets, including handshaking calls and responses.

Wireshark also provides options for specifying capture filters (for defining a smaller subset of data to be captured that you're interested in) or you can capture all traffic and apply a display filter to narrow down the traffic that is visible.

Continuing our Tech Support Corner blog series, this blog post covers how to go even further using Wireshark by defining scripted custom Wireshark captures for specific use cases, which is helpful for capturing infrequent issues without wasting a lot of unnecessary hard drive space.

Continue Reading

Tech Support Corner: Using PowerShell to Troubleshoot TCP Ports

4 min read

By Rodrigo Restrepo on May 5, 2022 2:00:00 PM


Do you find yourself in need of troubleshooting a TCP connection, but your IT department has everything locked down, so you're unable to install third-party Troubleshooting tools without permission? An often overlooked but effective tool for troubleshooting TCP socket connections is PowerShell.

Continuing our Tech Support Corner blog series, this blog post covers how to use PowerShell to effectively determine what issues you may be having with a problematic TCP Ethernet connection.

Continue Reading

2022 Automation & Control Software Learning Resources

6 min read

By Kevin Rutherford on Jan 27, 2022 2:00:00 PM


2021 furthered the transformations of 2020 as industry worldwide continued to adapt to succeed in the face of new challenges such as supply chain, a growing labor shortage, and exploding customer demand.  

This post is our 5th annual sharing of references to learning resources and new technology releases that users have told us were the most helpful to them over the course of the last year.

Continue Reading

Exploring OPC UA - Configuring OPC Router OPC UA Client & Server

13 min read

By Kevin Rutherford on Aug 5, 2021 2:00:00 PM


Continuing our Exploring OPC UA blog series, we're still going into the specifics of OPC UA security configuration in key Software Toolbox solutions that are OPC UA capable.

In this ninth post of the series, we will focus on OPC Router, focusing on stepping through what the settings are in OPC Router and how to get connected both for your OPC UA clients and servers.

Continue Reading

Exploring OPC UA - Configuring OPC Data Client for OPC UA Servers

6 min read

By Kevin Rutherford on Jul 22, 2021 2:00:00 PM


If you've been following our ongoing Exploring OPC UA blog series, we've been covering key Software Toolbox solutions and the specifics of configuring OPC UA security and connectivity.

In this eighth post of the series, we will focus on the OPC Data Client development toolkit, with the primary topic being how to exchange security certificates and establish a trust relationship between your custom OPC UA client and an OPC UA server.

Continue Reading

Exploring OPC UA - Configuring OPC Data Logger for OPC UA Servers

8 min read

By Kevin Rutherford on Jun 3, 2021 2:00:00 PM


If you've been following our ongoing Exploring OPC UA blog series, we've been covering key Software Toolbox solutions and the specifics of configuring OPC UA security and connectivity.

In this seventh post of the series, we will focus on OPC Data Logger, specifically stepping through settings related to security, endpoints and certificate management and connecting OPC Data Logger to OPC UA servers for logging data.

Continue Reading

Exploring OPC UA - Configuring Cogent DataHub OPC UA Client & Server

21 min read

By Kevin Rutherford on May 20, 2021 2:00:00 PM


As you may have seen in our recent posts in our ongoing Exploring OPC UA blog series, we've been going into the specifics of OPC UA security configuration in key Software Toolbox solutions that are OPC UA capable.

In this sixth post of the series, we will focus on Cogent DataHub, focusing on stepping through what the settings are in DataHub and how to get connected both for your OPC UA clients and servers.

Continue Reading

About this Blog

We're engineers like you, so this blog focuses on "How to" appnotes, videos, tech team tips, product update announcements, user case studies, and other technical updates.  Subscribe to updates below. Your feedback and questions on posts are always welcomed - just use the area at the bottom of any post.

Subscribe to our Blog

Recent Posts

Posts by Topic

See all