Firewall - NetComm NTC-400 Series User Manual

Item
Keep alive Disabled by
default.
Default setting: 5
seconds
Remote Subnet Mandatory field.
DMVPN Spoke Disabled by
default.
IPSec Pre‐ Mandatory field.
shared Key
IPSec NAT Disabled by
Traversal default.
IPSec Disabled by
Encapsulation default.
Mode
Tunnel Disabled by
default.
Save Button
Undo Button
Back Button
6.2

Firewall

The firewall functions include Packet Filter, URL Blocking, Content Filter, MAC Control, Application Filter, IPS and some
firewall options.
242 of 359
© NetComm Wireless 2019
Notes
Value Range: 1 - 255
Check  Enable to enable Keep alive function.
Select Ping IP to keep live and enter the IP address to ping. Enter the ping
time interval in seconds.
Value Range: 5 - 999 seconds
Specify the remote subnet for this GRE tunnel.
The Remote Subnet format must be IP address/netmask (e.g. 10.0.0.2/24).
It is for the Intranet of GRE server peer. So, at GRE client peer, the packets
whose destination is in the dedicated subnet will be transferred via the GRE
tunnel. Others will be transferred based on current routing policy of the
security router at GRE client peer.
If you entered 0.0.0.0/0 in the Remote Subnet field, it will be treated as a
default router setting for the GRE client peer, all packets, including the
Internet accessing of GRE client peer, will go through the established GRE
tunnel. That means the remote GRE server peer controls the flow of any
packets from the GRE client peer. Certainly, those packets come through
the GRE tunnel.
Check  Enable to have the router support DMVPN Spoke for this GRE
tunnel.
Enter a DMVPN spoke authentication Pre‐shared Key
Value Range: 8 - 32 characters
Note – Pre‐shared Key is available only when DMVPN Spoke is
enabled, see previous setting.
Check  Enable to enable NAT‐Traversal.
Note – IPSec NAT Traversal will not be available when DMVPN is
not enabled.
Specify the IPSec Encapsulation Mode from the dropdown box: Transport
mode or Tunnel mode
Note – IPSec Encapsulation Mode will not be available when
DMVPN is not enabled, see above.
Check  Enable to enable this GRE tunnel.
Click Save to create the GRE Tunnel Rule.
Click Undo button to cancel the settings.
Click Back button to return to the previous page.
Table 168 – GRE Rule Configuration
Description
User Guide