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<== Date ==>		<== Thread ==>

Subject:	How to know which CA client(IP address) modified a PV
From:	LiangChih Chiang via Tech-talk <tech-talk at aps.anl.gov>
To:	tech-talk at aps.anl.gov
Date:	Fri, 9 May 2025 09:54:25 +0800

Hello, EPICS mates,

There are multiple CA clients on different computers across the network.

A PV got modified erroneously, and nobody admits he did.

How to know which CA client(IP address) modified a PV in EPICS version 3.14.

I searched and got two methods:

use Wireshark or tcpdump to trace capture CA write packets.

modify EPICS Base( rsrv/caserver.c ) to insert log hooks.

(This may not be doable.)

What other methods do you use or recommend?

Replies:: Re: How to know which CA client(IP address) modified a PV J. Lewis Muir via Tech-talk

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ANJ, 27 May 2025