User Guide
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IRONPORT ASYNCOS 6.3 FOR WEB USER GUIDE
NOTIFICATION PAGE TYPES
Users accessing the Internet sometimes cannot access the server they want. By default, the
Web Proxy displays a notification page informing users they were blocked and the reason for
the block. This section lists and describes all possible notification pages a user might see
while accessing the Internet.
Possible reasons that cause notification pages to appear include the following:
• IronPort notification pages are enabled and the user accessed the Internet in a way that
violated an Access Policy.
• IronPort notification pages are configured to allow end-users to report misclassified pages
to IronPort and the user reported a misclassified page.
• The end-user acknowledgement page is enabled and the user accessed the Internet for the
first time since the timeout period expired.
• HTTPS scanning is enabled and the appliance is configured to drop HTTPS requests to
servers with invalid certificates.
• The Web Security appliance could not access the server requested due to an external
error, such as DNS failure or an unavailable server.
Most notification pages display a different set of codes that may help administrators or
IronPort Customer Support troubleshoot any potential problem. Some codes are for IronPort
internal use only.
Table 12-5 describes the different possible codes used in each notification page.
Table 12-5 Codes Used in Notification Pages
Notification Code Code Description
<version> The version of the notification message. For IronPort internal use only.
<ACL> The ACL decision tag that indicates how the DVS engine handled the
transaction.
For a list of ACL decision tags, see “ACL Decision Tags” on page 439.
<malware_value> Malware scanning verdict value.
For a list of malware scanning verdict values, see “Malware Scanning
Verdict Values” on page 460.
<ID> Transaction ID. For IronPort internal use only.
<time> The time the error occurred.
<blocking> Blocking code. For IronPort internal use only.
<HTTP_error> HTTP error text returned by the web server.