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SNMP

The Simple Network Management Protocol(SNMP) let a network administrator monitor on a

network by retrieving settings on remote network devices. Network administrator typically

runs an SNMP management station program such as MIB browser on a local host to obtain

information from an SNMP agent such as the router you use now.

Vendor OID:

The enterprise OID to which the system belongs to.

Name:

Enter information about the system name in the system contact field.

Location:

Enter information about the system contact person in the system contact

field.

Contact:

Enter information about the system contact person in the system contact

field.

Idle time out:

The period of time which allows SNMP to be idle before exit.

Name:

Community name.

Access Right:

Select ReadOnly or ReadWrite.

Apply:

Click Apply to save the changes.

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LAN Clients

LAN Client names are a way of applying specific Port-forwarding and Access Control rules to

individual computers on the LAN.

If DHCP is used, all DHCP clients are automatically

assigned and are designated as a LAN client.

To add a LAN client, click Advanced>Advanced Features>LAN Clients.

New IP Address:

Enter the IP Address.

Hostname:

Enter the Hostname.

Apply:

Click Apply to save the changes.

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MacFilters

MAC filtering enables rules to be defined which allow or deny data to pass through the Router

based on the source and destination MAC address and data type of each data frame.

To access MAC Filters Control, click on Advanced>Advanced Features>MAC Filters .

Usage examples of MAC Filter Rules are: to specify which computers on a network are

allowed Internet access; or to determine which particular computers are allowed to access

services provided by the Router (the last point is particularly relevant for routers serving

Wireless Networks as it can be used to prevent unauthorised people from attaching themselves

to a wireless LAN).

Enable/Disable MAC Filtering

To enable MAC filtering, navigate to the MAC Filter Control Screen and select the Enable

MAC Filters check box.

If the check box is selected, MAC filtering is enabled according to the list of MAC Filter Rules

that has been created.

If the box is de-selected, MAC Filtering will not be enabled, even if MAC Filter Rules have

been created.

Create MAC Filter Rules

Enter the Source MAC and Destination MAC details.

Entering zeros or blanks into the Source

or Destination fields enters a null value.

'Protocol' provides the choice of protocol type for the rule.

'Mode' provides the choice of Allow or Deny for the rule.

When all selections are made, click on Add to add the rule to the list of rules. A maximum of

20 MAC Filter Rules can be defined and saved.

To save changes, click on Save Settings on the left-hand menu.

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Edit or Delete MAC Filter Rules

To edit an existing MAC Filter Rule, click the radio button adjacent to the Filter Rule name.

The Rule will then appear in the top half of the MAC Filter control screen where it can be

edited. When editing is complete, click 'Add' to return the Rule to the list of existing rules.

To delete MAC Filter Rules, click on the 'Delete' tick box; multiple deletions can be made by

shift-clicking Delete tick boxes; Select All will select every rule.

When the desired selections

are made, effect deletion by clicking on Apply.

To save changes, click on Save Settings on the left-hand menu.

Hidden MAC Filter Rules

The MAC filter table contains three hidden rules. These rules are built into the Router to ensure

the user does not become locked out by entering a rule which prevents further access to the

router.

The first rule allows any and all ARP frames through the system.

The second rule allows all IPv4 frames with the destination MAC address of the bridge to go

through.

The third rule allows all IPv4 frames with the source MAC address of the bridge to go through.

TIP: To find the MAC address of a Windows-based computer, at the DOS prompt type:

ipconfig /all.

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Multicast

IGMP [=Internet Group Management Protocol] Multicast enables communication between a

single sender and multiple receivers on a network. It is used when data needs to be sent from

one to many devices. Typical uses might include the updating of mobile personnel from a

home office or the periodic publishing of an online newsletter. Multicasting provides efficien-

cies which enable it to use less network bandwidth than the sending of the same data by other

means [e.g. SMTP].

To access Multicasting, click on Advanced>Advanced Features>Multicast.

To enable Multicast, open the multicast screen and select the Enable IGMP Multicast.