Advantech ICR-2834 Hardware Manual page 42

• If the same IP address is recorded in your canonic name as a dynamically assigned address, it
means that the operator is using NAT or a firewall.
• You can verify NAT using ping to your server with static address and then compare with router's
IP address.
• You can verify a Firewall by accessing remotely to the router's Web interface.
• The operator may not provide the address of DNS server and without DNS server's address it
is impossible to connect to the dyndns.org server. The following messages will be shown in the
System Log:
– DynDNS daemon started
– Error resolving hostname: no such file or directory
– Connect to DynDNS server failed
L2TP or IPSec isn't establishing.
• Check the "System Log" page for error messages.
IPSec tunnel establishes but the communication does not run.
• Probably there are bad routing rules defined in the connected devices, or the default gateway.
I switched the router to offline mode by SMS message, but the router is in online mode after
reboot.
• SMS messages do not change the router configuration. They remain in effect only until the router
is rebooted.
ICR-2834 Hardware Manual 36