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Searching the Help

To search for information in the Help, type a word or phrase in the Search box. When you enter a group of words, OR is inferred. You can use Boolean operators to refine your search.

Results returned are case insensitive. However, results ranking takes case into account and assigns higher scores to case matches. Therefore, a search for "cats" followed by a search for "Cats" would return the same number of Help topics, but the order in which the topics are listed would be different.

Words and Phrases

Search for Example Results

A single word cat Topics that contain the word "cat". You will also find its grammatical variations, such as "cats".

Search for	Example	Results
A single word	`cat`	Topics that contain the word "cat". You will also find its grammatical variations, such as "cats".
A phrase. You can specify that the search results contain a specific phrase.	`"cat food"` (quotation marks)	Topics that contain the literal phrase "cat food" and all its grammatical variations. Without the quotation marks, the query is equivalent to specifying an OR operator, which finds topics with one of the individual words instead of the phrase.

A phrase.

You can specify that the search results contain a specific phrase.

"cat food" (quotation marks)

Topics that contain the literal phrase "cat food" and all its grammatical variations.

Without the quotation marks, the query is equivalent to specifying an OR operator, which finds topics with one of the individual words instead of the phrase.

Using Boolean Operators

Search for	Operator	Example
Two or more words in the same topic	`AND` `and` `+` (plus symbol) `&` (ampersand)	`cat AND dog` `"cat food"+milk` `"cat food"&"dog food"`
Either word in a topic	`OR` `or` `\|` (pipe)	`cat OR dog` `cat \| dog`
Topics that do not contain a specific word or phrase	`NOT` `not` `!` (exclamation point)	`NOT cat` `! dog`
Topics that contain one string and do not contain another	`^` (caret)	`cat ^ mouse`
A combination of search types	`( )` parentheses	`cat + (dog \| mouse)` `cat \| dog + (! mouse)`

Universal CMDB11.0

Using a Reverse Proxy

Use > Hardening > Using a Reverse Proxy > Distributed Denial of Service Attack Protection

Distributed Denial of Service Attack Protection

A few DDoS attacks such as Slowloris/Slow read may be mitigated by implementing third-party protections such as the following:

Apache HTTP Server as Revers Proxy. For this use mod_reqtimeout and mod_qos
F5 Big IP LTM iRule: applicable if using F5 hardware load balancer in front of UCMDB server

Note: Due to the nature of these types of attacks, it is not possible to implement application-specific fixes or enhancements to prevent these types of attacks.

For more information, refer to the following:

https://en.wikipedia.org/wiki/Denial-of-service_attack
http://ha.ckers.org/slowloris/
http://opensource.adnovum.ch/mod_qos/
https://httpd.apache.org/docs/trunk/mod/mod_reqtimeout.html
https://bz.apache.org/bugzilla/show_bug.cgi?id=54263
https://f5.com/resources/white-papers/mitigating-ddos-attacks-with-f5-technology
https://www.howtoforge.com/how-to-defend-slowloris-ddos-with-mod_qos-apache2-on-debian-lenny

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