See: http://www.ip-tracker.org/locator/ip-lookup.php?ip=52.29.203.145
-ec2-52-29-203-145.eu-central-1.compute.amazonaws.com
Comes as a bad request: http://toolbar.netcraft.com/site_report?url=http://ec2-52-29-203-145.eu-central-1.compute.amazonaws.com
ssl-cert on 52.29.203.145 : Subject: commonName=nimbus.bitdefender.net/organizationName=Bitdefender SRL/stateOrProvinceName=Bucuresti/countryName=RO
2 unrecognized services returned. One is Cisco Devnet nx-Nimbus
Seems part of Bitdefender TrafficLight extension traffic.
polonus