Asus SL6000 Setup Instructions page 90

Chapter 7. The Configuration Pages in more detail
commands of SMTP, FTP and RPC services and HTTP file extensions.
For FTP, SMTP and RPC service filters:
If an application filter is configured to allow certain commands, the Broadband Gateway will
allow ONLY those commands.
If an application filter is configured to deny certain commands, the Broadband Gateway will
deny ONLY those commands.
For HTTP application filter:
The application filter can be set only to deny file extensions.
To add a new application filter, choose the Filter type first from the drop down list.
Then choose the Add New option in the drop down list, Enter the Filter name in the
text box; Choose the Protocol from the drop down list. Enter the Port value; Choose the
action as Allow or Deny depending on whether you'd like to allow or deny the
commands. You can also choose to log messages whenever Broadband Gateway drops
or allows a packet based on the filter you've selected. You'd also have to type the
commands in the Command text boxes depending on the type of the filter you're
adding or modifying. Finally click on the Apply button to make the changes effective.
To view the existing or the configured application filters, choose the Filter name in the
drop down list. To delete an existing application filter, choose the Filter name in the
drop down list and click on the Delete Filter button.
Configuration Parameters
• Filter Type: You can select the Filter Type from the drop down list.
• Filter Name: Type the Filter name that you would like to add.
• Protocol: You can select the protocol from the drop down list.
• Port: Type the port number. For example, if you're adding a HTTP filter the port would be 80.
• Log: You can enable or disable logging of messages whenever Broadband Gateway denies
or allows a packet based on the filter that you've set. By clicking on enable you'd enable logging
of such messages.
• Commands: You can refer to the FTP and SMTP commands in Notes.
FTP: You can filter any or all of FTP commands such as PORT, RETR, STOR,
o
PASV etc.
HTTP: You can filter certain file extensions such *.java, *.ocx etc.
o
SMTP: You can filter any or all of SMTP commands such as VRFY
o
RPC: You can filter the specified RPC program numbers
o
Notes
7.4.7.2 FTP Commands
CWD Change working directory
PORT To communicate the port number for active data connection
PASV To initiate passive data connection
RETR Get from FTP server
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Solwise Asus SL6000 ADSL Ethernet Router User's Guide