WatchGuard Technologies FireboxTM System 4.6 manual Setting up proxy services, Click Yes

Setting up proxy services

2On the toolbar, click the Delete Service icon (it appears as an “X”).

You can also select Edit => Delete. A verification alert appears.

3Click Yes.

Policy Manager removes the service from the Services Arena.

4Click File => Save => To Firebox to save your changes to the Firebox. Specify the location and name of the new configuration file.

Setting up proxy services

The WatchGuard Firebox System uses a technology called “transparent proxies.” Transparent proxies can be employed without any special third-party or proxy-aware software, and are transparent to client programs. WatchGuard has application- specific proxies for SMTP, FTP, and HTTP.

When performing incoming, static NAT, internal hosts must point to the internal IP address of the server, not the Firebox or public IP address. Users should have their WINS, host file, or internal DNS set to resolve to the internal IP of the server in question. For more information, see “Configuring a service for incoming static NAT” on page 66.

Configuring an SMTP proxy service

The SMTP proxy limits several potentially harmful aspects of e-mail. The proxy scans the content type and content disposition headers and matches them against a user- definable list of known hostile signatures. E-mail containing suspect attachments is blocked and replaced with messages indicating that this action has been taken.

The list of disallowed signatures can be modified from the Content Types tab in the SMTP Proxy dialog box. You do not have to reboot the Firebox when you make these SMTP configuration changes.

The proxy also automatically disables nonstandard commands such as Debug, and can limit message size and number of recipients. If the message exceeds preset limits, the Firebox refuses the mail.

The Policy Manager uses separate dialog boxes for incoming and outgoing SMTP rules. Because incoming messages pose a greater threat to your network than outgoing ones, the dialog box for incoming SMTP has more controls and configurable properties.

Configuring the incoming SMTP proxy

Use the Incoming SMTP Proxy dialog box to set the incoming parameters of the SMTP proxy. You must already have an SMTP Proxy service icon in the Services Arena. From the Services Arena:

1Double-click the SMTP Proxy icon to open the SMTP Proxy Properties dialog box.

2Click the Properties tab.

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