NBAR Web-based Custom
Protocols
The NBAR Web-based
Custom Protocols feature provides the mechanism to define custom protocols to
match based on HTTP URL and/or host name.
Finding Feature
Information
Your software release
may not support all the features documented in this module. For the latest
caveats and feature information, see
Bug Search Tool and the
release notes for your platform and software release. To find information about
the features documented in this module, and to see a list of the releases in
which each feature is supported, see the feature information table.
Use Cisco Feature
Navigator to find information about platform support and Cisco software image
support. To access Cisco Feature Navigator, go to
www.cisco.com/go/cfn.
An account on Cisco.com is not required.
Restrictions for NBAR
Web-based Custom Protocols
The HTTP URL and the
Host name defined for custom protocol match should be unique. The length of the
protocol name should be at least 4 characters long and the prefix of the
protocol name should be different from the prefixes of any other protocol name.
Information About NBAR
Web-based Custom Protocols
Overview of NBAR Web-based
Custom Protocols
The NBAR Web-based
Custom Protocols feature provides the mechanism to define custom protocols to
match the traffic based on HTTP URL and/or host name.
All 120 custom
protocols can be defined to match based on HTTP URL and/or host name. While
matching web-based custom protocols, the custom protocol that has both HTTP URL
and the host name defined has the highest priority, followed by HTTP URL as the
second priority, and then followed by Host name as the last priority. Matching
a web-based sub-protocol has higher priority than matching any type of
web-based custom protocol, for example the
match protocol
http url http-url
command has a higher priority than a custom priority with the
same URL configuration.
How to Define NBAR Web-based Custom Protocols Match
Defining a Web-based Custom
Protocol Match
SUMMARY STEPS1.
enable
2.
configure
terminal
3.
ip nbar
custom
custom-protocol-name
http
{host
host-name |
url
http-url [
host
host-name]} [id
selector-id]
4.
end
DETAILED STEPS| | Command or Action | Purpose |
|---|
| Step 1 |
enable
Example:
|
Enables
privileged EXEC mode.
|
| Step 2 |
configure
terminal
Example:
Router# configure terminal
|
Enters global
configuration mode.
|
| Step 3 |
ip nbar
custom
custom-protocol-name
http
{host
host-name |
url
http-url [
host
host-name]} [id
selector-id]
Example:
Router(config)# ip nbar custom app_sales1 http url www.example.com
|
Defines
web-based custom protocol match.
| Note
|
To add a custom protocol, use the
ip nbar custom command. To enable the
protolcol, use the
match protocol command or
ip nbar protocol discovery
command.
|
|
| Step 4 |
end
Example:
|
(Optional)
Exits global configuration mode.
|
Configuration Examples for NBAR Web-based Custom Protocols
Examples: Defining
Web-based Custom Protocol Match
The following
example displays how to match a custom protocol based on http url:
Router> enable
Router# configure terminal
Router(config)# ip nbar custom app_sales1 http url www.example.com
The following
example displays how to match a custom protocol that contains the string
'example' as a part of host name:
Router> enable
Router# configure terminal
Router(config)# ip nbar custom app_sales1 http host *example*
Additional References for
NBAR Web-based Custom Protocols
Technical
Assistance
|
Description
|
Link
|
|---|
|
The
Cisco Support and Documentation website provides online resources to download
documentation, software, and tools. Use these resources to install and
configure the software and to troubleshoot and resolve technical issues with
Cisco products and technologies. Access to most tools on the Cisco Support and
Documentation website requires a Cisco.com user ID and password.
|
http://www.cisco.com/cisco/web/support/index.html
|
Feature Information for
NBAR Web-based Custom Protocols
The following table provides release information about the feature or features described in this module. This table lists only the software release that introduced support for a given feature in a given software release train. Unless noted otherwise, subsequent releases of that software release train also support that feature.
Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to www.cisco.com/go/cfn. An account on Cisco.com is not required.
Table 1 Feature Information for
NBAR Web-based Custom Protocols |
Feature Name
|
Releases
|
Feature
Information
|
|---|
|
NBAR
Web-based Custom Protocols Scalability
|
Cisco IOS XE
Release 3.13S
|
The NBAR
Web-based Custom Protocols Scalability feature enables defining custom
protocols match based on http host name and/or url.
The
following command was introduced or modified:
ip nbar
custom.
|
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