Concerning C2 traffic from freepbx server

Anyone else seeing traffic from their freepbx server to I see it is being flagged as C2 (command and control) traffic and dropped by our Sophos firewall. We are running Freepbx version Anyone had similar traffic flagged and if so was it a false positive or something concerning?

whois -h ’ -v -f’
20473 | | | US | arin | 2010-12-08 | AS-CHOOPA, US

presumably Vultr

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