CSS cookieurl: case sensitive?

Question

Hello,
As far as I understand, the HTTP header cookie field, and the embedded cookie (in a URL) are case-sensitive. Is this correct?
The settings look like this:
content stickyCookie
advanced-balance cookieurl
string prefix "SESSION_ID="
On the HTTP header the cookie field looks like this:
Set Cookie: SESSION_ID=ABCDEF
But if instead of this, the request comes from a client with the cookie embedded in the url, it looks like this:
http://localhost/Info/index;session_id=ABCDEF?page=home.
Is this field case-sensitive for the CSS? I know it is for the ACE, as I have done this and there is the "cookie secondary" command where you can specify how the url-embedded cookie looks like.
So I am afraid there is no way of making this work on a CSS?
Any help will be much appreciated!

Answer 1

Hi Javier,
The Cisco CSS is case-sensitive when searching for this string.
When configuring the CSS 11000 and 11500, determine first if you need a server cookie string. If the string operation under the content rule is match-service-cookie, which is the default setting, this parameter must be configured. In this case the service cookie string is matched against the cookie contained in the HTTP header for load balancing decision.
If the string operation under the content rule is set to the hash method, this parameter is not needed. In order to select one of the available servers, the cookie contained in the HTTP header is mathematically processed using a hashing algorithm. If available, the hash algorithm assigna the connection carrying a certain cookie to the same server. This example focuses on the match-service-cookie case.
Note: Cookies are case sensitive.
Configuring the Service
training4(config># service server_g
training4(config-service[server_g])# string LV2KJK (the server cookie text)
training4(config># service server_h
training4(config-service[server_h])# string AARIKA
Configuring the Content Rule
Note: Cookies require a Layer 5 rule.
You can create a Layer 5 rule by adding a URL.
For example, .
A Layer 4 rule can be promoted to a Layer 5 rule by issuing the advanced-balance cookies command.
Choose the advanced-balance method.
training4(config-owner-content[cookie-layer5])# advanced-balance cookies
Configure the string operation.
training4(config-owner-content[cookie-layer5])# string operation ?
match-service-cookie (DEFAULT)
hash-crc32
hash-xor
hash-a
Define the starting/ending bytes.
training4(config-owner-content[cookie-layer5])# string range 1 to 200
Start byte position of cookie/url after header (Range:1-600)
Specify the prefix located in the string range.
training4(config-owner-content[cookie-layer5])# string prefix "ASPSESSION"
"Quoted textual information"(Len: 0-32)
Indicate how many bytes to skip after the starting prefix.
training4(config-owner-content[cookie-layer5])# string skip-length 9
"Quoted textual information"(Len: 0-32)
Indicate how many bytes after the prefix/skip-length make-up the string.
training4(config-owner-content[cookie-layer5])# string process-length 6
Integer value(Range: 0-64)
If no string process length is configured, search after end of string character.
training4(config-owner-content[cookie-layer5])# string eos-char "&"
"Quoted textual information"(Len: 0-5)
Specify the failover in the event that a server goes down or is suspended.
training4(config-owner-content[cookie-layer5])# sticky-serverdown-failoversticky-srcip
sticky-srcip-dstport
sticky-srcip
balance (Default)
redirect
reject
Below is an example of a cookie string, and how some of the parameters work.
ASPSESSIONJJKKJJKK=LV2KJK44444444
!--- The string prefix = ASPSESSION.
!--- The string skip-length = 9. Skip
!--- nine characters after the prefix.
!--- The string process-length = 6, which would make
!--- the string LV2KJK matching service server_g.
ASPSESSIONSQPMMJHK=AARIKAMDESLD
!--- Matches service server_h.
Below is a sample configuration for the cookie strings.
!************************** SERVICE **************************
service server_g
ip address 172.17.63.240
string LV2KJK
active
service server_h
ip address 172.17.63.241
string AARIKA
active
!*************************** OWNER ***************************
owner braden
content server-cookie
protocol tcp
vip address 172.17.63.199
port 80
advanced-balance cookies
string range 1 to 200
string prefix "ASPSESSION"
string skip-length 9
string process-length 6
add service server_g
add service server_h
active
Kindly tell if this information is of any use to you.
Sachin garg