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<== Date ==> <== Thread ==>
Subject: Re: Why FQDN is sometimes required in the IOC access list?
From: Ralph Lange via Tech-talk <tech-talk at aps.anl.gov>
To: EPICS Tech Talk <tech-talk at aps.anl.gov>
Date: Wed, 16 Dec 2020 10:53:01 +0100
On Wed, 16 Dec 2020 at 10:09, Abdalla Ahmad via Tech-talk <tech-talk at aps.anl.gov> wrote:
  1.  When are FQDNs necessary for the access file?

From the documentation (AppDev Guide):
[...] To match, a host name must match the host name read by the CA client library running on the client machine; both names are converted to lower case before comparison however.

The name that a client uses depends on the name resolution service configuration on the client machine. If your client machines use different configurations, the requirements for their mention in the AS configuration file may differ.
One way to handle that uncertainty and make the IOC side more robust is to always put the simple name in addition to the fully qualified name in the AS configuration.

Cheers,
~Ralph

References:
Why FQDN is sometimes required in the IOC access list? Abdalla Ahmad via Tech-talk
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