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73
2.
Press
Apply/Save
to conform, and the items will be list as below
.
Remove
If you don’t need a specified Server, you can remove it. Check the check box beside the item you
want to remove, then press
Remove
, it will be OK.
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74
Port Triggering
Some applications require that specific ports in the Router's firewall be opened for access by the
remote parties. Port Trigger dynamically opens up the 'Open Ports' in the firewall when an
application on the LAN initiates a TCP/UDP connection to a remote party using the 'Triggering Ports'.
The Router allows the remote party from the WAN side to establish new connections back to the
application on the LAN side using the 'Open Ports'. A maximum 32 entries can be configured.
Click
Add
to add new settings.
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75
Use Interface:
select from the drop-down menu the interface you want rule applies to.
Application Name:
L
Select an application:
select an existing application from the drop-down menu.
L
Custom application:
creating your own service.
Trigger Port Start:
type a number used as trigger port start number.
Trigger dynamically opens up
the 'Open Ports' in the firewall when an application on the LAN initiates a TCP/UDP connection to a
remote party using the 'Triggering Ports'.
Trigger Port End:
type a number used as trigger port end number.
Triggering Protocol:
select the trigger protocol.
Open Port Start:
type a number used as open port start number. Open ports used
for remote
application in WAN side to communication with one in LAN side.
Open Port End:
type a number used as open port end number.
Open Protocol:
select the open protocol.
If users in LAN want to set a Aim Talk with someone in the WAN side, he want the router to open
dynamically a port(eg:5191) for the user to connect back to build the talk when he initiate a
TCP/UDP connection with the triggering port (eg:4099), then he can set as follows.
Set up
Select the Aim Talk application, or you can create yourself. Set the Trigger and Open port.
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76
2. Press
Save/Apply
to summit your settings.
If you want to delete the rule, please check the
Remove checkbox
first then press
Remove button
.
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77
DMZ Host
The DMZ Host is a local computer exposed to the Internet. When setting a particular internal IP
address as the DMZ Host, all incoming packets will be checked by the Firewall and NAT algorithms
then passed to the DMZ host, when a packet received does not use a port number used by any
other Virtual Server entries.
DMZ Host IP Address:
Enter the IP Address of a host you want it to be a DMZ host.
Using port mapping does have security implications, since outside users are
able to connect to PCs on your network. For this reason you are advised to use
specific Virtual Server entries just for the ports your application requires instead
of simply using DMZ or creating a Virtual Server entry for “All” protocols, as
doing so results in all connection attempts to your public IP address accessing
the specified PC.
If you have disabled the NAT option in the WAN-ISP section, the Virtual Server
function will hence be invalid.
If the DHCP server option is enabled, you have to be very careful in assigning
the IP addresses of the virtual servers in order to avoid conflicts. The easiest way
of configuring Virtual Servers is to manually assign static IP address to each
virtual server PC, with an address that does not fall into the range of IP
addresses that are to be issued by the DHCP server. You can configure the
virtual server IP address manually, but it must still be in the same subnet as the
router.
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