NTP not working on client machines

RouterOS General
1

I am having trouble synchronizing the time on all of the client machines (2 Win 7, 3 Linux) on my network. I used both wireshark and torch to do some testing and found that the request does get sent out to the NTP server and the response is received by the WAN port on the MT. However, I do not see a response arrive at the client machine I used for testing. How can I see what is happening to the packets while being handled by the MT (RouterOS 6.15)? Below are the only firewall filters enabled at the time of testing. I also made sure to turn off the client machine’s (Win7) firewall (Norton). Thanks in advance for any and all help.

/ip firewall filter
add chain=input comment=“default configuration” connection-state=established
add chain=input comment=“default configuration” connection-state=related
add action=drop chain=input comment=“default configuration” connection-state=invalid
add chain=forward comment=“default configuration” connection-state=established
add chain=forward comment=“default configuration” connection-state=related
add action=drop chain=forward comment=“default configuration” connection-state=invalid

Problems with Windows Time (NTP)!
2

I don’t have any firewall rules for port 123 and windows 8 and 8.1 all sync with time.nist.gov.
My win 7 stater netbook had an error message about not syncing, so I changed the server from time.windows.com to time.nist.gov but it still did not sync.

I went to time-a.nist.gov and that did work.