Abstract: A device may verify whether pinholes in a perimeter protection device are open and may determine pinhole opening and closing delays. The method for determining the pinhole opening delay may include sending a stream of packets for passing through the pinhole in the network perimeter protection device. The packets in the stream may be sent at known time intervals. The method may include receiving one or more of the packets in the stream, wherein the received packets passed through the pinhole. The pinhole opening delay may be based on an indication of the position of the first one of the packets received in the stream and the known time intervals. The pinhole closing delay may be based on the number of packets having passed through the pinhole, after sending a session termination message, and the known time intervals.

Abstract: A method may include receiving a first packet; determining, in a first processor, whether the first packet meets a criterion to be forwarded to a destination indicated in the first packet; receiving a second packet; determining whether the second packet is of a type for changing the criterion and sending the second packet to a second processor if the second packets is of the type for changing the criterion; receiving instructions, based on the second packet sent to the second processor, to change the criterion; and changing the criterion.

Abstract: A device receives an attack on a Session Initiation Protocol (SIP)-based device, determines a type of the attack, and applies, based on the determined type of the attack, a return routability check filter to the attack.

Abstract: A device may measure a first performance, associated with legitimate traffic without attack traffic, of a Session Initiation Protocol (SIP)-based protection device implementing authentication; measure a second performance, associated with legitimate traffic and attack traffic, of the SIP-based protection device implementing authentication; and measure a third performance, associated with legitimate traffic and attack traffic, of the SIP-based protection device implementing authentication and return routability filtering.

Abstract: A device may measure a first performance, associated with legitimate traffic without attack traffic, of a Session Initiation Protocol (SIP)-based protection device implementing authentication; measure a second performance, associated with legitimate traffic and attack traffic, of the SIP-based protection device implementing authentication; and measure a third performance, associated with legitimate traffic and attack traffic, of the SIP-based protection device implementing authentication and return routability filtering.

Abstract: A device may measure a first performance, associated with legitimate traffic without attack traffic, of a Session Initiation Protocol (SIP)-based protection device implementing authentication; measure a second performance, associated with legitimate traffic and attack traffic, of the SIP-based protection device implementing authentication; and measure a third performance, associated with legitimate traffic and attack traffic, of the SIP-based protection device implementing authentication and return routability filtering.

Abstract: A method may include receiving a first packet; determining, in a first processor, whether the first packet meets a criterion to be forwarded to a destination indicated in the first packet; receiving a second packet; determining whether the second packet is of a type for changing the criterion and sending the second packet to a second processor if the second packets is of the type for changing the criterion; receiving instructions, based on the second packet sent to the second processor, to change the criterion; and changing the criterion.

Abstract: A method may include receiving a first packet; determining, in a first processor, whether the first packet meets a criterion to be forwarded to a destination indicated in the first packet; receiving a second packet; determining whether the second packet is of a type for changing the criterion and sending the second packet to a second processor if the second packets is of the type for changing the criterion; receiving instructions, based on the second packet sent to the second processor, to change the criterion; and changing the criterion.

Abstract: A device may measure a first performance, associated with legitimate traffic without attack traffic, of a Session Initiation Protocol (SIP)-based protection device implementing authentication; measure a second performance, associated with legitimate traffic and attack traffic, of the SIP-based protection device implementing authentication; and measure a third performance, associated with legitimate traffic and attack traffic, of the SIP-based protection device implementing authentication and return routability filtering.

Abstract: A device receives an attack on a Session Initiation Protocol (SIP)-based device, determines a type of the attack, and applies, based on the determined type of the attack, a return routability check filter to the attack.

Abstract: A method may include receiving a first packet; determining, in a first processor, whether the first packet meets a criterion to be forwarded to a destination indicated in the first packet; receiving a second packet; determining whether the second packet is of a type for changing the criterion and sending the second packet to a second processor if the second packets is of the type for changing the criterion; receiving instructions, based on the second packet sent to the second processor, to change the criterion; and changing the criterion.

Abstract: A device verifies whether signaled pinholes in a Session Initiation Protocol (SIP)-based perimeter protection device are open, calculates a fine granularity pinhole opening delay of the SIP-based perimeter protection device, and calculates a fine granularity pinhole closing delay of the SIP-based perimeter protection device.