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Create an IP filter profile in LogMeIn Central

Create IP Filter Profiles to allow or deny connections to a host from specific IP addresses.

  1. Access the host preferences:
    • From the remote host computer, open the LogMeIn Control Panel and follow this path: Options > Preferences > Security
      To open the LogMeIn Control Panel, open your computer's toolbar at the bottom of your screen and select the LogMeIn icon. Then select LogMeIn Control Panel
    • From a client device (such as the logmein.com website, or the desktop client app), connect to the remote host's Main Menu and follow this path: Preferences > Security
  2. Under IP Address Filtering, select Edit Profiles to begin creating a filter profile.

    Result: The IP Filtering dialog box is displayed.

  3. Type a Name for your filter and select Add a new profile.
  4. Choose a filter type:
    • Choose allow to make a filter that allows specified addresses to access this host
    • Choose deny to make a filter that prevents specified addresses from accessing this host
  5. Under Address, enter the IP address you want to allow or deny.
    Accepted wildcards are an asterisk (*) that matches any number of characters, and a question mark (?) that matches a single character only.
  6. Enter a Subnet that you want to allow or deny.
  7. Select Add filter.

    Result: The filter is added to the IP Filters in Profile box.

  8. Repeat from step 2, above, to add additional filters to the Filter Profile.
    Important: Filters are checked in the order they are listed in the IP Filters in Profile box. Ordering is crucial. Use the up and down arrows next to the IP Filters in Profile box to set proper order.
  9. Select OK when you are finished adding filters to the Profile.

    Result: Your Filter Profile is saved and you are returned to the IP Filtering page.

  10. You must apply your Filter Profile before it can take effect. On the IP Filtering page, select a Filter Profile from the Profiles list and select Use Profile.

    Result: The Filter Profile is activated on the host.

Results: When a connection is made to the host, the remote IP address will be checked against the filter or filters in the applied Filter Profile. Access will be granted or denied accordingly.

IP filtering examples

These examples will help you understand how to use the IP Filtering feature.

Important:
  • Filtering conditions are read and applied line by line from top to bottom.
  • For an exact IP address, define an asterisk (*) for the subnet. For example, instead of 255.255.255.255, use an asterisk (*)
  • When you use an asterisk in the Address field then the subnet must be defined as (*)

IP Filtering Example 1

Allow connections from IP address 215.43.21.12 and the network 192.168.0.0, and deny all other connections.

ALLOW 215.43.21.12 (*)
ALLOW 192.168.0.0 (255.255.0.0)
-or-
ALLOW 215.43.21.12 (*)
ALLOW 192.168.* (*)

IP Filtering Example 2

Allow connections from IP address 215.43.21.12 and the network 192.168.0.0, but not from the address 192.168.0.12, and deny everything else.

ALLOW 215.43.21.12 (*)
DENY 192.168.0.12 (*)
ALLOW 192.168.0.0 (255.255.0.0)
-or-
ALLOW 215.43.21.12 (*)
DENY 192.168.0.12 (*)
ALLOW 192.168.* (*)
Note: Denying the connection from 192.168.0.12 comes before allowing connections to the 192.168.0.0 network. If the host was to find the ALLOW item first, it would let IP address 192.168.0.12 through, since it matches the condition. To prevent this, the address 192.168.0.12 is checked before the network to which it belongs.

IP Filtering Example 3

Allow all connections, except those coming from 192.168.0.12

DENY:192.168.0.12 (*)
ALLOW:* (*)

IP Filtering Example 4

Deny all connections from the network 192.168.0.0 except for the subnet 192.168.12.0; allow all other connections.

ALLOW:192.168.12.0 (255.255.255.0) 
DENY:192.168.0.0 (255.255.0.0)
ALLOW:* (*)
-or-
ALLOW:192.168.12.* (*)
DENY:192.168.* (*)
ALLOW:* (*)
Related Articles:
  • Set up an authentication attack blocker in LogMeIn Central
  • Set up a denial of service attack blocker in LogMeIn Central

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