Methods, systems, and computer readable media for receiving a clock synchronization message

1. A method for receiving a clock synchronization message, the method comprising:

at a first node configured to operate on a protected side of a firewall device:

sending, via the firewall device and to a second node configured to operate on a non-protected side of the firewall device, a clock lease message indicating an amount of time for clock synchronization, wherein the clock lease message triggers the firewall device to allow clock synchronization messages from the second node to the first node to traverse the firewall for the amount of time indicated in the clock lease message while discarding other messages from the second node that are directed to the first node; and

receiving, via the firewall device and from the second node, a clock synchronization message, wherein the clock synchronization message traverses the firewall during the amount of time for clock synchronization indicated in the clock lease message.

2. The method of claim 1 comprising:

sending, via the firewall device and to a second node, a clock synchronization reply message.

3. The method of claim 2 wherein the clock synchronization reply message includes clock synchronizing information usable for synchronizing a clock at the second node to a clock at the first node.

4. The method of claim 3 wherein the clock is usable for measuring one way delay, jitter, mean opinion score (MOS), or a traffic related measurement.

5. The method of claim 1 wherein the clock lease message includes a unique identifier identifying the first node.

6. The method of claim 1 comprising:

receiving, from the second node, a clock lease reply message acknowledging the clock lease message and including a unique identifier identifying the second node.

7. The method of claim 1 wherein the clock lease message is sent using a first port associated with the first node and the clock synchronization message is received using the first port associated with the first node.

8. The method of claim 1 comprising:

after the amount of time for clock synchronization has elapsed, sending, via the firewall device and to a second node, another clock lease message.

9. The method of claim 1 wherein clock synchronization occurs before, during, or after a test session involving sending traffic between the first node and the second node.

10. The method of claim 1 wherein the second node includes a test platform or a test device.

11. A system for receiving a clock synchronization message, the system comprising:

a first node configured to operate on a protected side of a firewall device, the first node comprising:

at least one processor;

a memory; and

a clock synchronization engine (CSE) implemented using the at least one processor and the memory, wherein the CSE is configured to:

send, via the firewall device and to a second node configured to operate on a non-protected side of the firewall device, a clock lease message indicating an amount of time for clock synchronization, wherein the clock lease message triggers the firewall device to allow clock synchronization messages from the second node to the first node to traverse the firewall for the amount of time indicated in the clock lease message while discarding other messages from the second node that are directed to the first node; and

receive, via the firewall device and from the second node, a clock synchronization message, wherein the clock synchronization message traverses the firewall during the amount of time for clock synchronization indicated in the clock lease message.

12. The system of claim 11 wherein the first node is configured to send, via the firewall device and to a second node, a clock synchronization reply message.

13. The system of claim 12 wherein the clock synchronization reply message includes clock related information usable for synchronizing a clock at the second node to a clock at the first node.

14. The system of claim 13 wherein the clock is usable for measuring one way delay, jitter, mean opinion score (MOS), or a traffic related measurement.

15. The system of claim 11 wherein the clock lease message includes a unique identifier identifying the first node.

16. The system of claim 11 wherein the second node is configured to receive, from the second node, a clock lease reply message acknowledging the clock lease message and including a unique identifier identifying the second node.

17. The system of claim 11 wherein the clock lease message is sent using a first port associated with the first node and the clock synchronization message is received using the first port associated with the first node.

18. The system of claim 11 wherein the first node is configured to:

after the amount of time for clock synchronization has elapsed, send, via the firewall device and to a second node, another clock lease message.

19. The system of claim 11 wherein clock synchronization occurs before, during, or after a test session involving sending traffic between the first node and the second node.

20. The system of claim 11 wherein the second node includes a test platform or a test device.

21. A non-transitory computer readable medium comprising computer executable instructions embodied in the computer readable medium that when executed by at least one processor of a computer perform steps comprising:

at a first node configured to operate on a protected side of a firewall device:

sending, via the firewall device and to a second node configured to operate on a non-protected side of the firewall device, a clock lease message indicating an amount of time for clock synchronization, wherein the clock lease message triggers the firewall device to allow clock synchronization messages from the second node to the first node to traverse the firewall for the amount of time indicated in the clock lease message while discarding other messages from the second node that are directed to the first node; and

receiving, via the firewall device and from the second node, a clock synchronization message, wherein the clock synchronization message traverses the firewall during the amount of time for clock synchronization indicated in the clock lease message.