** Shares of Palo Alto Networks PANW.O down 2.8% at $185.52 premarket, Fortinet FTNT.O down 2.8% at $76.15
** Reuters reports that Beijing orders Chinese firms to stop using cybersecurity software made by about a dozen U.S., Israeli firms over national security concerns
** Broadcom-owned VMware AVGO.O and Check Point Software CHKP.O also among affected vendors
** Authorities express concerns that foreign software could collect and transmit sensitive data abroad
** China's internet regulator, the Cyberspace Administration of China, and the Ministry of Industry and Information Technology hasn't responded to Reuters requests for comment
** The four companies also didn't reply to Reuters queries
** Notice issued in recent days as China accelerates push to replace Western tech with domestic alternatives amidst heightened trade and diplomatic tensions with the U.S.
** PANW up 13.7% and FTNT down 16.5% over the past year
(Reporting by Tharuniyaa Lakshmi in Bengaluru)
((tharuniyaa@thomsonreuters.com))