This indicates an attack attempt to exploit a Security Bypass vulnerability in D-Link IP Cameras.
This issue is caused by insufficient validation of access to the live video stream. It may allow remote attacker to view live video stream without authentication via a crafted http request.
DCS-2102/2121 - v1.05_RU
DCS-2102/2121 - v1.06
DCS-2102/2121 - v1.06_FR
TESCO DCS-2102/2121 - v1.05_TESCO
Information Disclosure: Remote attackers can gain sensitive information from vulnerable systems.
Apply the most recent upgrade or patch from the vendor.