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Sun, Feb 10, 2008 9:45 pm

Use Custom Filter with Netopia R7220-T Router

A Netopia R7220-T router has built-in firewall capabilities. It comes with two filter sets preconfigured, "Basic Firewall" and "NetBIOS", but you can create your own custom filters. To use a custom filter you have created, take the following steps.
  1. From the main menu, select Quick Menus and hit Enter.

                               Netopia R7220-T v4.6.2
                         Easy Setup...
                         WAN Configuration...
                         System Configuration...
                         Utilities & Diagnostics...
                         Statistics & Logs...
                         Quick Menus...
                         Quick View...
    Return/Enter displays options for the system.
    You always start from this main screen.

  2. From the Quick Menu, select Change Connection Profiles and hit Enter.

                                       Quick Menu
     Connection Profiles          Line Configuration     IP Setup
     Add Connection Profiles                             IP Address Serving Setup
     Change Connection Profiles                          IP Filter Sets
     Delete Connection Profiles   Backup Config          Static Routes
     WAN Default Profile                                 Network Address Translation
                                                         IPX Setup
                                                         IPX Filters & Filter Sets
     Console Configuration        TFTP
     SNMP Setup
    This menu allows you to visit most configuration screens.

  3. When your connection profile, e.g. Easy Setup Profile, appears hit enter to accept it for editing.

                                       Quick Menu
             +-Profile Name---------------------IP Address----IPX Network-+
     Add Conn| Easy Setup Profile                   | Setup
     Change C|                                                            |
     Delete C|                                                            |
     WAN Defa|                                                            |anslation
             |                                                            |
             |                                                            |
             |                                                            |er Sets
             |                                                            |
             |                                                            |
             |                                                            |
             |                                                            |
     Console |                                                            |
     SNMP Set|                                                            |
             |                                                            |
             |                                                            |
             |                                                            |
    Up/Down Arrow Keys to select, ESC to dismiss, Return/Enter to Edit.

  4. Select IP Profile Parameters... and hit Enter.

                                 Change Connection Profile
             Profile Name:                      Easy Setup Profile
             Profile Enabled:                   Yes
             Data Link Encapsulation...         RFC1483
             IP Enabled:                        Yes
             IP Profile Parameters...
             IPX Enabled:                       No
             Interface Group...                 Primary
    Return accepts * ESC cancels * Left/Right moves insertion point * Del deletes.
    Modify Connection Profile here. Changes are immediate.

  5. Select Filter Set... and hit Enter.

                                IP Profile Parameters
             Address Translation Enabled:       Yes
             IP Addressing...                   Numbered
             NAT Map List...                    Easy-PAT List
             NAT Server List...                 Easy-Servers
             Local WAN IP Address:    
             Local WAN IP Mask:       
             Filter Set...                      NetBIOS Filter
             Remove Filter Set
             Receive RIP:                       Both
    Return/Enter to select Filter Set (Firewall) for this profile.
    Configure IP requirements for a remote network connection here.

  6. Select the custom filter set you created, e.g. "Custom", if that was the name you used, and hit Enter.

                                IP Profile Parameters
             Address Translati+-----------------------------------+
             IP Addressing... | Basic Firewall                    |
                              | NetBIOS Filter                    |
             NAT Map List...  | Custom                            |
             NAT Server List..|                                   |
                              |                                   |
             Local WAN IP Addr|                                   |
             Local WAN IP Mask|                                   |
                              |                                   |
             Filter Set...                      NetBIOS Filter
             Remove Filter Set
             Receive RIP:                       Both
    Up/Down Arrows to select, then Return/Enter; ESC to cancel.

  7. Hit Esc to go back to the prior IP Profile Parameters menu. You should now see whatever name you used for your custom filter listed on the same line as Filter Set....

                                IP Profile Parameters
             Address Translation Enabled:       Yes
             IP Addressing...                   Numbered
             NAT Map List...                    Easy-PAT List
             NAT Server List...                 Easy-Servers
             Local WAN IP Address:    
             Local WAN IP Mask:       
             Filter Set...                      Custom
             Remove Filter Set
             Receive RIP:                       Both
    Toggle to Yes if this is a single IP address ISP account.
    Configure IP requirements for a remote network connection here.

  8. You can then keep hitting Esc until you get back to the main menu or just disconnect from the router

[/hardware/network/router/netopia] permanent link

Sun, Feb 10, 2008 4:39 pm

Colasoft MAC Scanner 1.1

If you need to determine the Media Access Control (MAC) addresses on a LAN using a Windows system, Colasoft provides a tool, MAC Scanner, which you can use to scan all IP addresses in a subnet to obtain a list of the MAC, aka hardware addresses, associated with those IP addresses. The results can be exported to a text or Comma Separated Value (CSV) file.

[/os/windows/software/network/scanner] permanent link

Sun, Feb 10, 2008 2:02 pm

Dell PowerConnect 3024 - Finding MAC Addresses

To determine the Media Access Control (MAC) addresses of devices connected to a Dell PowerConnect 3024 switch, take the following steps:
  1. Select Address Manager from the main menu.

                                   PowerConnect 3024
                                       Main Menu
                                 a. System Manager
                                 b. Port Manager
                                 c. Address Manager
                                 d. Spanning Tree
                                 e. VLAN and CoS Setup
                                 f. Port Trunking
                                 g. Port Mirroring
                                 h. SNMP Management
                                 i. Multimedia Support
                                 j. Statistics
                                 k. Save Configuration
    Hit  to configure Static Address Table or Address Aging Time
                                                    <Ctrl-L> Refresh  <Ctrl-W> Save

  2. Select Dynamic Addresses from the Address Manager menu.

                                   PowerConnect 3024
                                    Address Manager
                       a. Static Addresses
                       b. Dynamic Addresses
                       c. Address Aging
                       d. Static Multicast Groups Administration
                       e. Static Multicast Groups Membership
    Hit <Enter> to view Dynamic Addresses
    <ESC> Back                                      <Ctrl-L> Refresh  <Ctrl-W> Save

You will then see the MAC addresses that have been seen by the switch for each port. Ports with no device attached will not be listed. If nothing is listed for a port at the time you check, though, that does not necessarily mean that no device is attached to that port, only that no activity has been seen on that port recently. A system could be attached to the port, but turned off, or may be on, but has not communicated with another device over the network recently.

If the switch is seeing multiple MAC addresses on a port, as it would if there is another switch or hub plugged into the port, which itself has multiple systems plugged into it, it will show all of the MAC addresses. In the example below, 5 addreses are listed for port 6 and 4 addresses are listed for port 16. There is another switch connected to port 6 and a hub connected to port 16.

                               PowerConnect 3024
                       Address Manager/Dynamic Addresses

             Dynamic Address Learning is: Enabled
    Port:      VLAN ID:      MAC Address:                   Query  Next  Prev
    Port    VLAN     MAC Address             Port    VLAN     MAC Address
    1:3     1     00:0c:f1:c8:99:09          1:16    1     00:09:6b:19:38:a5
    1:4     1     00:13:20:97:de:e4          1:20    1     00:16:01:41:72:3b
    1:5     1     00:1d:09:0a:5d:55
    1:6     1     00:11:11:64:ec:bc
    1:6     1     00:13:20:97:e2:cf
    1:6     1     00:13:72:3b:4a:b6
    1:6     1     00:16:76:96:cb:1e
    1:6     1     00:17:a4:26:88:d5
    1:7     1     00:11:11:5e:b5:90
    1:8     1     00:11:11:a8:9c:b0
    1:15    1     00:30:18:aa:70:a5
    1:16    1     00:00:74:ad:e8:c6
    1:16    1     00:00:c5:7c:08:7c
    1:16    1     00:06:25:b5:b4:62

Hit <Space> to Enable or Disable Dynamic Address Learning
<ESC> Back                                      <Ctrl-L> Refresh  <Ctrl-W> Save

If you see a MAC address which you don't recognize, you can lookup up the manufacturer of the network adapter associated with that address at Vendor/Ethernet MAC Address Lookup and Search, which may help you identify what type of device is connected on the port showing that MAC address. For instance, when I look up 00:09:6b:19:38:a5, I see the vendor listed as "IBM Corporation". When I look up 00:17:a4:26:88:d5, I see "Global Data Services (may now be Hewlett-Packard, HP)" listed and, in this case, the device is an HP K5400 printer.


  1. Vendor/Ethernet MAC Address Lookup and Search

[/hardware/network/switch/dell] permanent link

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