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Add DMZ WAN Service
Outbound Service
This page is used for setting up a firewall rule for traffic going from the DMZ network to the WAN. Outbound traffic for a service can be configured to be blocked or allowed at all times, or per a schedule (defined in the Schedule page on the Security menu).
To add an outbound rule, input the following fields:
Service Name: This is a unique name assigned to the service. The name usually indicates the type of traffic the rule covers such as ftp, ssh, telnet, ping, etc. Services not already in the list can be added on the Services page under the Security menu Services page.
Filter: Defines an action to be taken on the enabled rule. It can be:
v Block Always: Block selected service at all times.
v Enable Always: Allow selected service to pass through at all times.
v Block by schedule, otherwise allow: Works in conjunction with a schedule defined in the Schedule 1/2/3 pages. The selected service will be blocked during the scheduled interval and will be allowed to pass through at other times.
v Allow by schedule, otherwise block: Works in conjunction with a schedule defined in the Schedule 1/2/3 pages. The selected service will be allowed to pass through during the scheduled interval and will be blocked at other times.
DMZ Users: Specifies whether one or more IP Addresses on the DMZ network will be affected by the rule. This rule will affect packets for the selected service from the defined IP address or range of IP addresses on the DMZ network.
v Any: All computers on the DMZ network will be affected by the rule.
v Single Address: A single IP address on the DMZ network will be affected by the rule.
v Address Range: A range of IP addresses on the DMZ network will be affected by the rule.
WAN Users: Specifies whether one or more IP addresses on the WAN will be affected by the rule. This rule will affect packets for the selected service to the defined IP address or range of IP addresses on the WAN side.
v Any: All IP addresses on the WAN will be affected by the rule.
v Single Address: A single WAN IP address will be affected by the rule.
v Address Range: A range of WAN IP addresses will be affected by the rule.
Priority: The priority assigned to IP packets of this service. The priorities are defined by “Type of Service (TOS) in the Internet Protocol Suite” standards, RFC 1349. The router marks the Type Of Service (TOS) field as defined below:
v Normal-Service: No special priority given to the traffic. The IP packets for services with this priority are marked with a TOS value of 0x00.
v Minimize-Cost: Used when data must be transferred over a link that has a lower "cost". The IP packets for services with this priority are marked with a TOS value of 0x02.
v Maximize-Reliability: Used when data needs to travel to the destination over a reliable link and with little or no retransmission. The IP packets for services with this priority are marked with a TOS value of 0x04.
v Maximize-Throughput: Used when the volume of data transferred during an interval is important even if the latency over the link is high. The IP packets for services with this priority are marked with a TOS value of 0x08.
v Minimize-Delay: Used when the time required (latency) for the packet to reach the destination must be low. The IP packets for services with this priority are marked with a TOS value of 0x10.
Log: Specifies whether the packets for this rule should be logged or not. To log details for all packets that match this rule, select Always. Select Never to disable logging.
For example, if an outbound rule for a schedule is selected as Block Always, then for every packet that tries to make an outbound connection for that service, a message with the packet’s source address and destination address (and other information) will be recorded in the log. Enabling logging may generate a significant volume of log messages and is recommended for debugging purposes only.
NAT IP: Specifies whether the source address of the outgoing packets on WAN should be assigned WAN interface address OR different one.
NAT single IP is on: The Interface to which the NAT IP belongs to. All the outgoing packets on WAN will be routed through the specified WAN interface only.
v WAN Interface Address: All the outgoing packets on WAN will be assigned WAN interface address.
v Single Address: All the outgoing packets on WAN will be assigned the specified IP address.
Note: This option will be available only when WAN mode is "NAT". The IP address specified should fall under the WAN subnet.
Click Apply to save the settings.
Click Reset to revert to the previous settings.
Add DMZ WAN Service
Inbound Service
This page is used for setting up a firewall rule for traffic coming from the WAN to the DMZ network. Inbound traffic for a service can be configured to be blocked or allowed, by default, or per a schedule (defined on the Schedule menu. Security page).
To add an inbound rule, complete the following fields:
Service Name: This is a unique name assigned to the service. The name usually indicates the type of traffic the rule covers such as ftp, ssh, telnet, ping, etc. Services not already in the list can be added on Services page under the Security menu.
Filter: Defines an action to be taken on the enabled rule. It can be:
v Block Always: Block selected service at all times.
v Enable Always: Allow selected service to pass through at all times.
v Block by schedule, otherwise allow: Works in conjunction with a schedule defined in the Schedule 1/2/3 pages. Selected service will be blocked during the scheduled interval and will be allowed to pass through at other times.
v Allow by schedule, otherwise block: Works in conjunction with a schedule defined in the Schedule 1/2/3 pages. Selected service will be allowed to pass through during the scheduled interval and will be blocked at other times.
Send to DMZ IP Address: An IP address and port number of a machine on the DMZ network which is hosting the server. Select the port number checkbox only if the server is listening on a port other than the default port. For example, if a machine on the DMZ side is running a telnet server on port 2000, then select the Translate to Port Number checkbox and type 2000 in the Port field; if it is listening on default port 23, then the box can be left unchecked.
Note: This option is only available when the router is in NAT mode (see the Network Configuration menu, WAN Mode page).
Destination: The WAN IP address that will map to the incoming server. It can either be the address of the WAN1 or WAN2 ports or another WAN IP address. This field is only enabled under NAT mode because the router needs to map traffic coming from a particular WAN port to a DMZ machine.
DMZ Users: Specifies whether one or more IP addresses on the DMZ network will be affected by the rule. This field is only enabled in routing mode since the DMZ network is accessible only in this mode.
v Any: All computers on the DMZ network will be affected by the rule.
v Single Address: A single IP address on the DMZ network will be affected by the rule.
v Address Range: AA range of IP addresses on the DMZ network will be affected by the rule.
WAN Users: Specifies whether one or more IP addresses on the WAN will be affected by the rule. This rule will affect packets that are transferred for the selected service to the IP address or range of IP addresses on the WAN side.
v Any: All IP addresses on the WAN will be affected by the rule.
v Single Address: A single WAN IP address will be affected by the rule.
v Address Range: A range of WAN IP addresses will be affected by the rule.
Priority: The priority assigned to IP packets of this service. The priorities are defined by “Type of Service (TOS) in the Internet Protocol Suite” standards, RFC 1349. The router marks the Type Of Service (TOS) field as defined below:
v Normal-Service: No special priority given to the traffic. The IP packets for services with this priority are marked with a TOS value of 0x00.
v Minimize-Cost: Used when data must be transferred over a link that has a lower "cost". The IP packets for services with this priority are marked with a TOS value of 0x02.
v Maximize-Reliability: Used when data needs to travel to the destination over a reliable link and with little or no retransmission. The IP packets for services with this priority are marked with a TOS value of 0x04.
v Maximize-Throughput: Used when the volume of data transferred during an interval is important even if the latency over the link is high. The IP packets for services with this priority are marked with a TOS value of 0x08.
v Minimize-Delay: Used when the time required (latency) for the packet to reach the destination must be low. The IP packets for services with this priority are marked with a TOS value of 0x10.
Log: Specifies whether the packets for this rule should be logged or not. To log details for all packets that match this rule, select Always. Select Never to disable logging.
For example, if an inbound rule for a schedule is selected as Block Always, then for every packet that tries to make an outbound connection for that service, a message with the packet’s source and destination addresses (and other information) will be recorded in the log. Enabling logging may generate a significant volume of log messages and is recommended for debugging purposes only.
Click Apply to save the settings.
Click Reset to revert to the previous settings.
 

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