D-Link DFL-1500 [202/271] Smtp filters

Part VI

Content Filters

D-Link 194

22.4 Steps

22.4.1 SMTP Filters

Step 1 – Enable SMTP Filters

Check the Enable SMTP Proxy checkbox and

click Apply.

While enabling the SMTP filter feature. All the

configured firewall rules (LAN Æ WAN SMTP) will

be disabled immediately. Subsequently the LAN

user to access internet mail will take over by the

“SMTP filter”.

ADVANCED SETTINGS > Content Filters > Mail Filters > SMTP

FIELD DESCRIPTION Range / Format EXAMPLE

Enable SMTP Proxy Enable SMTP Proxy feature of DFL-1500 text string Enabled

Append “.bin” to E-mail

attachments whose

¾ filename extension

When the filename extension of attachment file matches

“Filename extension”, add the “.bin” extension to the

attachment file.

¾ exact filename

When the whole filename of attachment file matches “Exact

filename”, add the “.bin” extension to the attachment file.

Filename

extension / exact

filename

Filename extension

Table 22-1 Enable SMTP feature

Step 2 – Add a SMTP Filter

Select filename extension, enter vbs, and

click Add to add a rule. This rule will apply to all

LAN-to-DMZ/WAN SMTP connections. All such

SMTP traffic will be examined to change the

filename extension from vbs to vbs.bin.

Note that the filename to block cannot contain the

marks such as “ /, \, *, ?, “, <, >, | ”.

ADVANCED SETTINGS > Content Filters > Mail Filters > SMTP