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Unexpected outbound traffic on port 88: recursive DNS servers?

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Yesterday, within 10 minutes, IPTABLES blocked more than 200 outbound packets on port 88 on tun0, with SRC= (AirVPN DNS through SSL tunnel) and DST= three IP addresses: (amanah.com), (amanah.com), and (regika.com).  I understand these are both AirVPN servers.  At the time, I was connected to Carinae through an SSL tunnel.


A little googling suggests the traffic was connected to recursive AirVPN DNS servers.  Would the fact that the packets were blocked cause any problems?  It didn't seem to, but would it be advisable to add an IPTABLES rule allowing outbound traffic on tun0 port 88 where SRC=

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