User guide

Configuring the WebBlocker Service
User Guide 221
4 Next to the WebBlocker Servers box, click Add.
5 In the dialog box that appears, type the IP address of the server in the
Value field. Click OK.
If you want to add additional WebBlocker servers, see “Installing Multiple
WebBlocker Servers” on page 225.
Allowing WebBlocker server bypass
By default, if the WebBlocker server does not respond, HTTP traffic
(Outbound) is denied. To change this such that all outbound HTTP traffic
is allowed if a WebBlocker server is not recognized, on the WebBlocker
Controls tab, select Allow WebBlocker Server Bypass.
The Allow WebBlocker Server Bypass option is global. If you set it in one
HTTP service, it applies to all other HTTP proxy services you might have.
Configuring the WebBlocker message
Use the field marked Message for blocked user to define the text string
displayed in end users’ browsers when they attempt to open a blocked
Web site. The text string must be plain text and cannot contain HTML or
the greater than (>) or less than (<) characters. The following
metacharacters are permitted:
%u
The full URL of the denied request.
%s
Block status, or the reason the request was blocked. The possible
statuses are: host, host/directory, all web access blocked, denied,
database not loaded.
%r
The WebBlocker category or categories causing the denial.
For example, the following entry in the field will display the URL, the
status, and the category:
Request for URL %u denied by WebBlocker: %s blocked
for %r.
With this entry in the Message for blocked user field, the following string
might appear in a user’s browser: