ntpdate through http proxy
 

My Linux box(es) sit behind a corporate firewall that ONLY provides authenticated http proxy for outside connectivity.
ie. I have no control over opening up specific TCP/UDP ports.

Is there any way I can use ntpdate or similar NTP clients to sync to a time server outside the corporate bounds/firewall?

Any help/pointers would be much appreciated.

Thankx.

-Thas