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<== Date ==> <== Thread ==>
Subject: Why FQDN is sometimes required in the IOC access list?
From: Abdalla Ahmad via Tech-talk <tech-talk at aps.anl.gov>
To: "tech-talk at aps.anl.gov" <tech-talk at aps.anl.gov>
Date: Wed, 16 Dec 2020 09:09:39 +0000
Hi

I am facing an issue on a PC where it cannot write to PVs in a certain IOC, but other PCs are writing with no problems. After troubleshooting I tried using the FQDN of that PC in the access file instead of only its hostname and now that PC can write to that IOC. What is really confusing is that other PCs are not having their FQDNs in the access file, only their hostnames.

The DHCP server is configured to distribute two DNS servers, first it distributes our IT group's DNS then the machine network DNS, where each DNS server is using different zone name. When we first completed this setup, I remember certain hosts have to use their FQDNs in order for the access file to work, but others as I mentioned only used their hostnames.

So my questions are:
  1.  When are FQDNs necessary for the access file?
  2. Does the IOC acf file accepts IP address instead of hostnames?
Best Regards,
Abdalla.
Replies:
Re: Why FQDN is sometimes required in the IOC access list? Ralph Lange via Tech-talk
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