Cisco Cisco Web Security Appliance S360 Fehlerbehebungsanleitung

Question:

How to redirect users to a search engine when they have a DNS failure?

Environment: WSA

Symptoms: When users type in a non−existent URL (not DNS resolvable) by default WSA will return a
notification page similar to the following:

This Page Cannot Be Displayed

−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−

The host name resolution (DNS lookup) for this host name ( temple.edu ) has failed. The Internet address may
be misspelled or obsolete, the host ( temple.edu ) may be temporarily unavailable, or the DNS server may be
unresponsive.

Please check the spelling of the Internet address entered. If it is correct, try this request later.

If you have questions, or if this condition persists, please contact your corporate network administrator and
provide the codes shown below.

Notification codes: (1, DNS_FAIL, temple.edu)

Some customers would like to be able to redirect users to a search engine instead. This is similar to what is
performed by Windows Live Search.

Its possible to redirect users request to non−existent URL by changing the default notification page to
something similar to:

For Windows Live Search:

<html>
<head>
<title> Notification Page </title>
<meta name="author" content="Cisco systems">
<meta name="description" content="Notification Page">
<meta http−equiv="refresh" content="0;url=http://search.live.com/results.aspx?FORM=DNSAS&q=%H">
</head>
<body>
<p>
</body>
</html>

For Google:

<html>
<head>
<title> Notification Page </title>
<meta name="author" content="Cisco systems">
<meta name="description" content="Notification Page">