I had look at the firewall logs and i can see my production server connects to microsoft (220.127.116.11) on UDP port 3544. A quick reading suggests this is to do with Teredo tunneling (IPV6 translation tech). Unless I am mistaken this done by Windows server; if so does this OS Service can post data to this port creating a risk of exposing sensitive data on the server?
Should I be dropping these UDP packets at firewall as risk avoidance measure?
Does anyone know whether an outbound call to 18.104.22.168 on port 3544 is a well known action by windows servers (2012 R2 ver for instance)?