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It's not a security thing. We do this with the the resellers who white label our VOIP.
<span id="ms-outlook-android-cursor"></span>CNAMEs allow us to be flexible with our own hosts and infrastructure without having all of our resellers change DNS records.
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> NANOG <nanog-bounces+ray=oit.co@nanog.org> on behalf of Dovid Bender <dovid@telecurve.com><br>
<b>Sent:</b> Friday, November 6, 2020 5:07:26 AM<br>
<b>To:</b> NANOG <nanog@nanog.org><br>
<b>Subject:</b> CNAME records in place of A records</font>
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<div dir="ltr">Hi,<br>
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<div>Sorry if this is a bit OT. Recently several different vendors (in completely different fields) where they white label for us asked us to remove A records that we have going to them and replace them with CNAME records. Is there anything *going around* in
 the security aranea  that has caused this?</div>
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