Application Control Lite - Revision history

Græmer: /* Signatures */

2022-05-03T18:32:35Z

Signatures

← Older revision		Revision as of 18:32, 3 May 2022
Line 65:		Line 65:

	'''WARNING:'''		'''WARNING:'''
	In previous and older versions of ~~Untangle~~ NG Firewall, there was a default signature set. However, enabling block on some of the default signatures caused false positives and blocked legitimate network traffic. Despite big warnings in the user interface and help documentation, we found users often misconfigured Application Control Lite anyway and experienced network problems as a result. To avoid this issue there are now no default signatures. If you have read this warning and understand that misconfiguring Application Control Lite '''will cause major network connectivity issues,''' then you can download the original list of signatures [[Media:Application_Control_Lite_Bad_Signatures.json \| here]] and import them into Signatures.		In previous and older versions of NG Firewall, there was a default signature set. However, enabling block on some of the default signatures caused false positives and blocked legitimate network traffic. Despite big warnings in the user interface and help documentation, we found users often misconfigured Application Control Lite anyway and experienced network problems as a result. To avoid this issue there are now no default signatures. If you have read this warning and understand that misconfiguring Application Control Lite '''will cause major network connectivity issues,''' then you can download the original list of signatures [[Media:Application_Control_Lite_Bad_Signatures.json \| here]] and import them into Signatures.

Hpaunet: /* Signatures */

2019-12-02T21:50:40Z

Signatures

← Older revision		Revision as of 21:50, 2 December 2019
Line 47:		Line 47:
	=== Signatures ===		=== Signatures ===

	The '''Signatures''' tab shows the the list of current signatures. Signatures are [http://en.wikipedia.org/wiki/Regular_expression regular expressions] that are written to match ~~know~~ protocols as accurately as possible. New custom signatures can be designed to match certain applications or sessions, or signatures can often be found for many existing protocols [http://l7-filter.sourceforge.net/protocols here].		The '''Signatures''' tab shows the the list of current signatures. Signatures are [http://en.wikipedia.org/wiki/Regular_expression regular expressions] that are written to match known protocols as accurately as possible. New custom signatures can be designed to match certain applications or sessions, or signatures can often be found for many existing protocols [http://l7-filter.sourceforge.net/protocols here].

	As the early data in each session goes from the server to the client and the client to the server, it is stored in a buffer. As each chunk of data arrives the data is evaluated against any enabled signatures. If the signature is checked "log" then the session will be tagged and logged as having matched the specified signature. If the signature is checked "block" it will be logged and the session will immediately be closed.		As the early data in each session goes from the server to the client and the client to the server, it is stored in a buffer. As each chunk of data arrives, the data is evaluated against any enabled signatures. If the signature is checked "log" then the session will be tagged and logged as having matched the specified signature. If the signature is checked "block" it will be logged and the session will immediately be closed.

	Writing custom signatures can be dangerous and difficult. Usually one of several outcomes will happen when writing a block signature:		Writing custom signatures can be dangerous and difficult. Usually one of several outcomes will happen when writing a block signature:
Line 65:		Line 65:

	'''WARNING:'''		'''WARNING:'''
	In previous and ~~old~~ versions of Untangle there was a default signature set. However, enabling block on some of the default signatures caused false positives and blocked legitimate network traffic. Despite big warnings in the user interface and help documentation, we found users often misconfigured Application Control Lite anyway and experienced network problems as a result. To avoid this issue there are now no default signatures. If you have read this warning and understand that misconfiguring Application Control Lite '''will cause major network connectivity issues,''' then you can download the original list of signatures [[Media:Application_Control_Lite_Bad_Signatures.json \| here]] and import them into Signatures.		In previous and older versions of Untangle NG Firewall, there was a default signature set. However, enabling block on some of the default signatures caused false positives and blocked legitimate network traffic. Despite big warnings in the user interface and help documentation, we found users often misconfigured Application Control Lite anyway and experienced network problems as a result. To avoid this issue there are now no default signatures. If you have read this warning and understand that misconfiguring Application Control Lite '''will cause major network connectivity issues,''' then you can download the original list of signatures [[Media:Application_Control_Lite_Bad_Signatures.json \| here]] and import them into Signatures.


	{{AppScreenshot\|application-control-lite\|signatures}}		{{AppScreenshot\|application-control-lite\|signatures}}


	== Reports ==		== Reports ==

Dmorris at 18:13, 20 June 2018

2018-06-20T18:13:51Z

← Older revision		Revision as of 18:13, 20 June 2018
Line 7:		Line 7:
	{\| width='100%'		{\| width='100%'
	\|-		\|-
	\| align="center" \| [[Image:~~ApplicationControlLite_128x128~~.png]]     '''Application Control Lite'''		\| align="center" \| [[Image:ApplicationControlLite.png\|128px]]     '''Application Control Lite'''
	\| align="center" \|		\| align="center" \|
	{\|		{\|

Dmorris at 21:32, 14 June 2017

2017-06-14T21:32:20Z

← Older revision		Revision as of 21:32, 14 June 2017
Line 15:		Line 15:
	\|[http://www.untangle.com/store/application-control-lite.html Application Control Lite Description Page]		\|[http://www.untangle.com/store/application-control-lite.html Application Control Lite Description Page]
	\|-		\|-
	\|[http://~~www~~.untangle.com/~~store~~/application-control-lite~~.html~~ Application Control Lite ~~Screenshots~~]		\|[http://demo.untangle.com/admin/index.do#apps/1/application-control-lite Application Control Lite Demo]
	\|-		\|-
	\|[http://forums.untangle.com/application-control-lite/ Application Control Lite Forums]		\|[http://forums.untangle.com/application-control-lite/ Application Control Lite Forums]

Dmorris at 16:38, 12 June 2017

2017-06-12T16:38:19Z

← Older revision		Revision as of 16:38, 12 June 2017
Line 66:		Line 66:
	'''WARNING:'''		'''WARNING:'''
	In previous and old versions of Untangle there was a default signature set. However, enabling block on some of the default signatures caused false positives and blocked legitimate network traffic. Despite big warnings in the user interface and help documentation, we found users often misconfigured Application Control Lite anyway and experienced network problems as a result. To avoid this issue there are now no default signatures. If you have read this warning and understand that misconfiguring Application Control Lite '''will cause major network connectivity issues,''' then you can download the original list of signatures [[Media:Application_Control_Lite_Bad_Signatures.json \| here]] and import them into Signatures.		In previous and old versions of Untangle there was a default signature set. However, enabling block on some of the default signatures caused false positives and blocked legitimate network traffic. Despite big warnings in the user interface and help documentation, we found users often misconfigured Application Control Lite anyway and experienced network problems as a result. To avoid this issue there are now no default signatures. If you have read this warning and understand that misconfiguring Application Control Lite '''will cause major network connectivity issues,''' then you can download the original list of signatures [[Media:Application_Control_Lite_Bad_Signatures.json \| here]] and import them into Signatures.

			{{AppScreenshot\|application-control-lite\|signatures}}

Dmorris at 16:26, 12 June 2017

2017-06-12T16:26:27Z

New page

[[Category:Applications]]
Application_Control_Lite
Application_Control_Lite#Status
Application_Control_Lite#Signatures
Application_Control_Lite#Event_Log

{| width='100%'
|-
| align="center" | [[Image:ApplicationControlLite_128x128.png]]     '''Application Control Lite'''
| align="center" |
{|
|-
| Other Links:
|-
|[http://www.untangle.com/store/application-control-lite.html Application Control Lite Description Page]
|-
|[http://www.untangle.com/store/application-control-lite.html Application Control Lite Screenshots]
|-
|[http://forums.untangle.com/application-control-lite/ Application Control Lite Forums]
|-
|[[Application Control Lite Reports]]
|-
|[[Application Control Lite FAQs]]
|}
|}
 
----

== About Application Control Lite ==

Application Control Lite scans sessions for the specified signatures and will log and/or block sessions based on their content. Many applications can be hard to block based on port as modern applications will find and use open ports automatically. Application Control Lite provides a basic functionality to block sessions based on the content (data) in the session.

== Settings ==

This section reviews the different settings and configuration options available for Application Control Lite.

=== Status ===

The '''Status''' tab will show you current information on signatures Available, Logged and Blocked.

{{AppScreenshot|application-control-lite|status}}

=== Signatures ===

The '''Signatures''' tab shows the the list of current signatures. Signatures are [http://en.wikipedia.org/wiki/Regular_expression regular expressions] that are written to match know protocols as accurately as possible. New custom signatures can be designed to match certain applications or sessions, or signatures can often be found for many existing protocols [http://l7-filter.sourceforge.net/protocols here].

As the early data in each session goes from the server to the client and the client to the server, it is stored in a buffer. As each chunk of data arrives the data is evaluated against any enabled signatures. If the signature is checked "log" then the session will be tagged and logged as having matched the specified signature. If the signature is checked "block" it will be logged and the session will immediately be closed.

Writing custom signatures can be dangerous and difficult. Usually one of several outcomes will happen when writing a block signature:

* It will not match anything. In this case, the signature needs to be fixed.
* It will block the desired protocol/application and nothing else. This is ideal.
* It will only partially block the protocol. Many multi-session protocols only have some sessions identified. This can have varying effects depending on the application.
* It will block the protocol and block other things too (false positives). This can cause major problems with the network.
* It will block the protocol and the application will adapt and use an alternative protocol to communicate. Many applications will try alternative techniques to avoid blocking.

As such great care and expertise is involved in writing signatures to achieve the desired effect.

'''NOTE:'''
Application Control Lite, while powerful, can be difficult, time consuming, and dangerous to configure correctly. [[Application Control]] is recommended for most users as it comes preloaded with hundreds of maintained and current behavioral signatures and a commercial third-party application identification engine.

'''WARNING:'''
In previous and old versions of Untangle there was a default signature set. However, enabling block on some of the default signatures caused false positives and blocked legitimate network traffic. Despite big warnings in the user interface and help documentation, we found users often misconfigured Application Control Lite anyway and experienced network problems as a result. To avoid this issue there are now no default signatures. If you have read this warning and understand that misconfiguring Application Control Lite '''will cause major network connectivity issues,''' then you can download the original list of signatures [[Media:Application_Control_Lite_Bad_Signatures.json | here]] and import them into Signatures.

== Reports ==

{{:Application Control Lite Reports}}

== Related Topics ==

[[Application Control]]

== Application Control Lite FAQs ==

{{:Application Control Lite FAQs}}