A system is configured to perform operations that include determining an exception event corresponding to a transmission of a plurality of network packets over an electronic network. The electronic network may cause network address translation to be performed on the plurality of network packets. The operations may also include identifying, based on a log of the plurality of network packets, a first network packet associated with the exception event and calculating, based on a payload portion of the first network packet, a packet signature corresponding to the first network packet. The operations may further include determining, based on a comparison between a first data structure and a second data structure using the packet signature, original source address information that corresponds to the first network packet prior to the network address translation being performed on the first network packet.