Hongdian H7921/H7920 Basic 3G/4G Router - Manual (Page 125)

H92x 3G/4G Router 7 FAQ
Version (2014-05-28) 7 -91
7.5 VPN Problem
7.5.2 VPDN cannot connect
Phenomenon
VPDN cannot connect
Possible Reason
 VPDN port work abnormal
 VPDN parameter wrong
 VPDN peer server abnormal
Solution
 Make sure Modem is online
 Set the correct port to VPDN
 VPDN parameter wrong
 Check VPDN peer server
7.5.3 VPN cannot communicate
Phenomenon
VPN already connect, but cannot communicate
Possible Reason
 Router table config wrong
 VPN peer server config wrong
Solution
 Add related Router table
 Check VPN peer server setting
7.5.4 Router can communicate but subnet cannot
Phenomenon
Router can communicate but subnet cannot
Possible Reason
 VPN peer server config wrong
 Local Router has no MASQ
 Wrong local route table
Solution
 Check VPN peer server setting
 Local Router has no MASQ, please manual add VPN port MASQ