Embodiments of the present disclosure relate to a method, apparatus, and computer readable medium for providing a security service for a data center. According to the method, a packet terminating at or originating from the data center is received. At least one label is determined for the packet, each label indicating a security requirement for the packet. Based on the at least one label, a security service chain is selected for the packet, the security service chain including an ordered set of security functions deployed in the data center and to be applied to the packet. The packet is transmitted to the selected security service chain in association with the at least one label, the packet being processed by the ordered set of security functions in the security service chain.