To obviate the possibility of a data packet requesting for a communication between a source computer and a destination computer being blocked either by a source firewall or a destination firewall or both, the source computer is configured to transmit the data packet to an intermediary sever, bypassing the source firewall and the destination firewall. The intermediary server is configured to analyze the data packet transmitted from the source computer and is further configured to acknowledge the need to establish a communication between the source computer and the destination computer. The intermediary server subsequently generates a notification notifying the destination computer to establish a communication with the source computer. The intermediary server transmits a notification to the destination computer and triggers the destination computer to respond to the notification and establish a communication session with the source computer.