[DNSSEC-Ops] Afrinic DNS Issue -- PNC Bank NA

Filisko, Steven V steven.filisko at pnc.com
Thu Jul 19 15:11:24 UTC 2018

To Whom It May Concern:

I'm from PNC Bank in the US.  We swapped a CNAME in our DNS on 2018-06-27 to move clients to new DataCenters for our Mobile Banking App.

I am seeing a small number of customer client IPs hitting our old Datacenter -- All are IPs registered to AfriNic.

I believe there is a bad cache within your DNS systems.  The TTL should have expired in 300s.
The following are the affected names.


servicelink1.pnc.com    canonical name = servicelink.glbo.pnc.com.
servicelink2.pnc.com    canonical name = servicelink.glbo.pnc.com.


servicelink1.pnc.com    canonical name = servicelink1.glbo.pnc.com.
servicelink2.pnc.com    canonical name = servicelink2.glbo.pnc.com.

AfriNic Client IPs:

Please let me know what can be done about this and let me know if you require additional information!!!



Steven V. Filisko
Lead Security Engineer / DataPower ATL | PS&A
Product Security & Assurance | Cyber Security
PNC Financial Services Group | Cleveland
steven.filisko at pnc.com

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