Actually I am wrong, we support username/password authentication scheme. :-)
On 29.06.2023 16:30, Łukasz Dywicki wrote:
Hello Antonio,
Apache PLC4X currently supports only anonymous connections. If your PLC
is configured with some security (sign / sign and encrypt) then it will
not work.
There is working on adding support for that, but its not finalized nor
ready for review yet.
Kind regards,
Łukasz
On 29.06.2023 11:10, FARIELLO, ANTONIO wrote:
Dear PLC4x Team,
I'm writing to you to document a problem we encountered when trying to
connect to a Siemens PLC via OPC UA using a Java client.
We programmed a Java client to establish a connection to the Siemens
PLC, following the recommended methods and procedures.
However, we were unable to get a working connection. During our tests,
we were connected to a switch via network cable, and the same switch
was in turn connected to the PLC.
Running the test several times (without any changes to the code) we
obtained 3 different results:
1) Error: "Connection terminated by remote"
2) Error: "An established connection was aborted by the software in
your host machine"
3) Connection established successfully (very rarely).
I would like to point out that we have tested the functionality of
other tools such as Apache Milo and UA Expert, which successfully
connected to Siemens PLC using the same network environment. These
tools established a connection without problems, proving that the PLC
and its configuration are correct.
Therefore, we are interested in understanding what could be the cause
of the problem we are having with the Java client that we have
developed using PLC4x. We can rule out a malfunction of the PLC or its
configuration, as other tools work fine.
Thank you for the attention dedicated to our request and I look
forward to your response to resolve this issue.
Best regards,
Antonio.
*Antonio Fariello*
Professional | Industrial Operations Engineer
Capgemini Italia | Italy
[email protected] <mailto:[email protected]>
www.capgemini.com <http://www.capgemini.com/>
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