To make blocking work, you can change an existing blocking level or add a new one. Here we start this example from adding a new blocking level.
As in Figure 1.1, add a new blocking level named "Blocking MSN".

As in Figure 1.2, you should check the "Block MSN".

Then you need to set the blocking level for computers which you want to implement this blocking policy in the "User-computer Table". Please refer to Modify The User-computer Table.
Please refer to "Add A New Blocking Level". Add a new blocking level named "Blocking MSN file transfer".
As in Figure 2.1, you should check the "Block MSN file transfer".

Then you need to set the blocking level for computers which you want to implement this blocking policy in the "User-computer Table". Please refer to Modify The User-computer Table.
WFilter can not block existing MSN file transfer sessions. You need to sign in your msn again for blocking policy to take effect.
Please refer to "Add A New Blocking Level". Add a new blocking level named "Blocking chat".
As in Figure 3.1, you should check the "Customize ID access rules".

Then you need to set the blocking level for computers which you want to implement this blocking policy in the "User-computer Table". Please refer to Modify The User-computer Table.
For example, select the "use black list". Add msn accounts you want to block into the "Black List". One account per line.
As in Figure 3.2, we add "MSN p2pmanage@hotmail.com" and "MSN abcd@hotmail.com" in the "Black List" to block both the two accounts.

Click "Modify" to save the configurations.
You need to set the blocking level for computers which you want to implement this blocking policy. As in Figure 3.3, choose the "Blocking chat" blocking level in the "Blocking rules". Remember to click "Save" to save configurations.

WFilter can not block existing MSN file transfer sessions. You need to sign in your msn again for blocking policy to take effect.