CSS 11503 Stickyness session based
Need assistance comming up with a soulution for session based Stickyness.
1.can this be based on the J-Session ID?
2.Can the CSS send a cookie and the clients stick to the same servers until the session expires and the cookie os removed?
3. Also can we set a timeout value for the cookie?
If servers are setting the cookies then you need something like this
Service webserver1
ip address 10.10.10.1
string server1 <-- server cookie value
active
Service webserver2
ip address 10.10.10.2
string server2 <-- server cookie value
active
Service webserver3
ip address 10.10.10.3
string server3 <-- server cookie value
active
content mycontent
vip address 12.12.12.12
add service webserver1
add service webserver2
add service webserver3
string prefix "JSESSIONID="
protocol tcp
port 80
url "/*"
advanced-balance cookies
sticky-inact-timeout 60 <-- Inactivity timeout value for cookie
active
The string prefix (that goes on the Content Rule) would need to match be the name of the
cookie string prefix "JSessionID="
Then the string on the services would need to match the value that is inserted on each
server:
Example:
Service webserver1
ip address 10.10.10.1
string server1
active
Then the cookies injected from server1 would need to look like this:
JSessionID=service1
That is how the CSS would then identify which server the cookie belongs to and how to send
it to it. If the JDSessionID values are random, then the CSS would not be able to match the values to a service.
Similar Messages
-
CSS 11503 stickyness weightedrr problem
Hello,
i have a small problem with three web servers balanced by CSS.
The servers are weighted and source ip stickyness is enabled. But as soon as i activate "balance weigtedrr" in the content rule, i recieve no awnsers from the CSS, although the servers are alive.
When i switch back to "no balance" in the content rule, everthing works fine.
I am not sure, if i really need the "balance weigtedrr" command
to activate the weigted round robin, because i have no equipment to test it.
config:
service www1
ip address 10.160.1.176
port 9090
keepalive type http
weight 2
active
service www2
ip address 10.160.1.186
port 9090
keepalive type http
weight 4
active
service www3
ip address 10.160.1.182
port 9090
keepalive type http
weight 4
active
content WWW
vip address 10.160.1.121
add service www1
add service www2
add service www3
advanced-balance sticky-srcip
sticky-inact-timeout 1440
balance weightedrr
port 80
protocol tcp
active
Software version is sg0750103
thank you
juergenHi Juergen,
If using the balance weightedrr, you actually need to specify the weight when adding the services to the content rule itself.
So in your case, when in config mode on the "content WWW" you would then type in "add service www1 weight 4" instead of using it in the service itself. You would remove it from the service.
The reason it is done this way is because you can then use that same service in a different content rule and actually specify a different weight, or no weight at all. There is more flexibility with this option.
Regards
Pete.. -
CISCO CSS 11503: Adaptive Session Redundancy + Resets
Hi
we have release 7.10.206a configured with SourceGroup and ASR. I made a sniffer trace and experienced that the CSS sends a lot of RST. As well I saw that it use only 1984 source ports for the connections to the server. How can I increase the number of source Ports? .In the attachments you will find the sniffer trace with the incorrect behaviour and the configuration.
Any suggestion, idea ?the problem of the RST seems to be the frequent reuse of the same source port.
The destination of this connection seems to be confused and ACK the new SYN with the ack number of the previous connection. This ack number is out of range from the syn sequence number so the result if a RST.
ie:
Flow1 - Syn -> packet 1
Flow1 - Last ACK -> packet 33
Flow 2 - syn -> packet 34
Flow 2 - ack (instead of syn/ack) with acknumber same is packet 33.
This triggers a RESET -> packet 36
Flow 3 - syn -> packet 55
Flow 3 - same as flow 2 issue, ack with old ack number. This triggers a RST (packet 57).
Now the 2nd issue, the CSS (I believe tpkg0x.post.ch is the CSS) sends packet for flow 2 but the end station believes flow 2 was killed with the RESET of flow 3 and the host sends a RST to the CSS (packet 59) because its connection does not exist anymore.
So the all issue is the fact that ports are being reused to quickly.
You will need to involve more people to find a workaround to the 1984 ports available [and be aware they are available but not all usable].
Work with Marco K., your sale support.
Regards,
Gilles. -
CSS 11503 Load Balancing Verification
Alright, so I have toiled long and hard to get this right. I think I have the config down but I am unsure on how to verify how this load balancing is working.
Here is the Content Config that I am speaking of:
content cad-rule
add service wls1-e0
add service wls1-e1
add service wls2-e0
add service wls2-e1
add service wls3-e0
add service wls3-e1
add service wls4-e0
add service wls4-e1
add service wls5-e0
add service wls5-e1
add service wls6-e0
add service wls6-e1
arrowpoint-cookie expiration 00:00:15:00
advanced-balance arrowpoint-cookie
redundant-index 2
vip address 172.30.194.195 range 2
arrowpoint-cookie name TOQ
protocol tcp
port 8001
url "/*"
active
Each service in the rule above is configured as follows:
service wls1-e1
port 8001
protocol tcp
strin ags001-e1
ip address 172.30.193.81
keepalive type http
keepalive uri "/cad/index.html"
redundant-index 12
keepalive frequency 20
keepalive maxfailure 10
keepalive retryperiod 2
active
I am using the advanced arrowpoint cookies because I need some stickiness here. Straight round-robin would not have done what I needed it to do.
Now, when I go to my show summary, this is what I see for this rule:
cad-rule Master wls1-e0 84274
wls1-e1 13144
wls2-e0 96884
wls2-e1 26374
wls3-e0 71145
wls3-e1 16592
wls4-e0 76403
wls4-e1 8657
wls5-e0 118623
wls5-e1 22760
wls6-e0 30836
wls6-e1 20464
The far right column indicates the services hits. I originally had the E1's suspended and activated them later on. So if this was true round robin, all the E0's should have the same number of service hits and all the E1's should have the same number of service hits. But as you can see, the wls5 server is getting hit the most while the wls6 server is sitting there twiddling its thumbs.
Now understanding how the arrowpoint cookies do their load balancing (inserting a cooking into the flow and then timing out after 15 mins as configured above) I would not expect a 1:1 ratio of load balancing between servers. But the distribution above seems rather extreme.
Does anyone have any suggestions on how to both A) verify that this is the right config and B) suggest to my boss that this is working the way it should be working?
Thanks!
JamesHi James,
There are several reasons of the uneven load balancing that you are seeing (based on the show summary). First
of all, the CSS is configured to do stickiness (advance-balance).
With arrowpoint-cookies (for HTTP only) method for stickiness, only the requests coming with the same cookie
are going to get stuck to the same server, since the cookie is
lost when the browser is closed (or based on the expiration), then the stickiness is going to be session
based and if the same client open a new session is going to be load balanced.
Is important to understand that when using stickiness, no real even load balancing is
going to happen since we are sticking new flows to the same server; even when layer 5 stickiness would
permit more even balancing than layer 3 stickiness (source IP based).
Also consider that the "show summary" is a command to see the hits (requests) being balanced to an specific
server, this is a good command to see the load balancing, anyway since the CSS balance
connections (flows), a persistent connection could have a lot of requests, so all those requests are
always going to the same server (incrementing the amount of hits in the counter) while a non-persistent
connection would be just one request (refer to HTTP persistence).
Also keep in mind that if a service is take out for maintenance, or is added to the load balancing later
than another, or if goes down for a period of time, then the CSS will be balancing among the remaining alive
servers. When you add the server again, the another servers are going to have connections
already established, so since the CSS is doing round robin, the server last added will
never have the same amount of connections (nor hits) that the other ones, because while one could
have 55 for example, the new one will have it first connection, and when the first one
gets the 56, the another will get the second, and so on.
Please let me know if this makes any sense.
Diego M -
I currently have a CSS 11503 LB that I am using to balance 443 and 80 traffic and I have it working but my question is if a users are coming from a proxy should I continue to use Layer 3 LB technique? Also is it possible to see the real IP address instead of the IP of the proxy server?
the problem with proxy is if you use some form of stickyness like sticky src ip.
Since the src ip is always the proxy, you end up with all your traffic going to a single server.
If you are doing sticky src ip, I would suggest to use arrowpoint-cookie instead.
To see the real-ip you need your proxy to insert in the http header a 'x-forwarded-for' line with the client ip.
Your servers can then extract this value to determine the client ip.
On the CSS you won't be able to see the client-ip.
Gilles. -
Global Cerificate on CSS 11503
Hi
I am planning to enable https for few web servers behind a CSS 11503. I have tested the functionality with the trial cert every thing works as desired.
Now I need to buy a certificate from Verisign to make it work in production.
At verisign they offer two different certs (Secure Site --40 bits encryption) and (Secure Site Pro -- 128 bit encryption).
1. Is this 128 bit cert a "global cert"? and I need to concatenate the "intermediate cert" and "server cert" to make it work?
2. If all my users are in USA then does it make sense to buy this 128 bit certificate?
3. Verisign website also asks for "server Platform" and cisco is not mentioned as an option (I can see other LB as F5 in the list). What should I select for the server Platform when I am requesting it for CSS 11503 (I have generated the CSR on CSS 11503).
Thanks in advance
Glenn1.The guy who picked the phone at verisign had no clue.Verisign website says the following
Secure Site Certificate (40bit minimum)- SSL Certificates without SGC
To install your SSL Certificate, go to the instructions below for your server software. If your server is not listed or you need additional information, refer to your server documentation or contact your server vendor
Secure Site Pro Certificate(128bit minimum) - SSL Certificates with SGC
If you are installing an SSL Certificate with SGC, you need to copy an Intermediate CA Certificate before proceeding to the installation instructions for your server software.
2.My understanding was that 40 bit is minimum encryption level and only old browsers (exported ones) will us 40/56 bit ciphers. Other wise even with 40 bit certificate the new browsers will establish a 128 bit session.
Verisign says about their 40 bit certificate
"40-Bit to 256-Bit SSL Encryption Non-SGC SSL Certificates provide a minimum of 40-bit and up to 256-bit SSL encryption. Site visitors using certain older browsers and many Windows 2000 users will only receive 40- or 56-bit encryption unless they’re connecting to an SGC-enabled SSL Certificate"
I found a document on net in favor of buying 40 bit certs.
http://www.whichssl.com/myths_about_sgc.html
Gilles I am a bit confused here.Need HELP :) -
Remove Health Care (keepalives) CSS 11503
Hi,
We normally distribute the load between two servers by checking if the server its active (using TCP 80), yesterday, we want to remove the Health Care (keepalives) due to a maintenance test, to sent the traffic direct to the server, but the service stop working.
We think we didn’t remove the health care properly, could anybody please help me to know hoe to remove it?
We are using CSS 11503, I’m adding the config.
ThanksCSS11503-2(config)# service Linux2
CSS11503-2(config-service[Linux2])# ip add 192.168.20.41
CSS11503-2(config-service[Linux2])# active
CSS11503-2(config-service[Linux2])# show service Linux2
Name: Linux2 Index: 33
Type: Local State: Alive
Rule ( 192.168.20.41 ANY ANY )
Session Redundancy: Disabled
Redirect Domain:
Redirect String:
Keepalive: (ICMP 5 3 5 )
Keepalive Encryption: Disabled
Last Clearing of Stats Counters: 08/12/2009 05:29:24
Mtu: 1500 State Transitions: 0
Total Local Connections: 0 Total Backup Connections: 0
Current Local Connections: 0 Current Backup Connections: 0
Total Connections: 0 Max Connections: 65534
Total Reused Conns: 0
Weight: 1 Load: 2
Weight Reporting: None
CSS11503-2(config-service[Linux2])# keepalive type none
CSS11503-2(config-service[Linux2])# show service Linux2
Name: Linux2 Index: 33
Type: Local State: Alive
Rule ( 192.168.20.41 ANY ANY )
Session Redundancy: Disabled
Redirect Domain:
Redirect String:
Keepalive: (NONE 5 3 5 )
Keepalive Encryption: Disabled
Last Clearing of Stats Counters: 08/12/2009 05:29:24
Mtu: 1500 State Transitions: 1
Total Local Connections: 0 Total Backup Connections: 0
Current Local Connections: 0 Current Backup Connections: 0
Total Connections: 0 Max Connections: 65534
Total Reused Conns: 0
Weight: 1 Load: 2
Weight Reporting: None
CSS11503-2(config-service[Linux2])#
Same if the service is down before disabling the keepalive.
CSS11503-2(config-service[Linux2])# keepalive type icmp
CSS11503-2(config-service[Linux2])# show service Linux2
Name: Linux2 Index: 33
Type: Local State: Down
Rule ( 192.168.20.41 ANY ANY )
Session Redundancy: Disabled
Redirect Domain:
Redirect String:
Keepalive: (ICMP 5 3 5 )
Keepalive Encryption: Disabled
Last Clearing of Stats Counters: 08/12/2009 05:31:42
Mtu: 1500 State Transitions: 4
Total Local Connections: 0 Total Backup Connections: 0
Current Local Connections: 0 Current Backup Connections: 0
Total Connections: 0 Max Connections: 65534
Total Reused Conns: 0
Weight: 1 Load: 255
Weight Reporting: None
CSS11503-2(config-service[Linux2])# keepalive type none
CSS11503-2(config-service[Linux2])# show service Linux2
Name: Linux2 Index: 33
Type: Local State: Alive
Rule ( 192.168.20.41 ANY ANY )
Session Redundancy: Disabled
Redirect Domain:
Redirect String:
Keepalive: (NONE 5 3 5 )
Keepalive Encryption: Disabled
Last Clearing of Stats Counters: 08/12/2009 05:36:08
Mtu: 1500 State Transitions: 5
Total Local Connections: 0 Total Backup Connections: 0
Current Local Connections: 0 Current Backup Connections: 0
Total Connections: 0 Max Connections: 65534
Total Reused Conns: 0
Weight: 1 Load: 2
Weight Reporting: None
Gilles. -
The senerio contains a PIX 515 E firewall,4507R Chassis switch and a CSS 11503. The servers in inside zone of the PIX is load balanced using a vip with default route specified in the CSS is the inside zone interface IP of the PIX
Now I would like to load balance the servers in the DMZ zone of the PIX with a separate vip(from DMZ zone) in the same CSS. Since the default route in CSS is towards the inside zone of the PIX, I am unable to see the load blanced pages from dmz. Is there any solution to load balance the servers of the 2 zones with 2 different vip's using a single css ?The default behavior is to use the calling device's CSS for the redirected calls. In your case it sounds like you want to use the redirecting device's CSS. I haven't tried this myself but I believe you will need to change the following registry entry on your PGs. You will want to use option 2 (ROUTEADDRESS_SEARCH_SPACE).
HKEY_LOCAL_MACHINE\SOFTWARE\Cisco
Systems,Inc.\ICM\IPCCL\PG1B\PG\CurrentVersion\JGWS\jgw1\JGWData\Dynamic
"UseRouteAddressSearchSpace"=dword:00000000
- Used to control behavior on CTI Route Points for Route Selects.
UseRouteAddressSearchSpace can be to set 0, 1, or 2 where :
DEFAULT_SEARCH_SPACE = 0
CALLINGADDRESS_SEARCH_SPACE = 1
ROUTEADDRESS_SEARCH_SPACE = 2 -
Access to a logged-in user's information via a session based object
I am in the process of putting together a design for the security layer of a given
application I am working on. The requirements for authentication demand that
the framework take advantage of digital certificates and username/password verification.
The digital certificate end is relatively straightforward in terms of configuration
within WebLogic 6.1. I am planning on implementing a RDBMS security realm for
the username/password verification piece and again, from the documentation I have
seen, it seems relatively straightforward in setting that up as well.
The question I do have is in regards to once the user has successfuly logged in
to the application. Is there anyway to manage and have access to a set of user
info or credentials once they successfuly log in - aka some sort of session based
object that WebLogic Server facilitates? Or is this something that will have
to be explicitly built from our end if requirements do arise that necessitate
user information to be readily available as such?
Any feedback would be helpful....thanks!!Use the cfquery tag to query the database. If you don't know
how to write sql, I have heard good things about the book, Teach
Yourself SQL in 10 Minutes by Ben Forta. -
How to invalidate a session based on the session id
How to invalidate a session based on the session id
You have to write your own support for this.
It used to be in the API, but was deprecated as a security hole.
The best way to do it is implement a session listener (javax.servlet.http.HttpSessionListener) which notifies you when sessions are created/destroyed.
You can then keep a map of sessions in your own code, indexed by session Id, and access any/all of them to invalidate as you choose. -
Trace session based on CLIENT_IDENTIFIER
Hello all,
i am on 11.2.0.1....we have a sap application and trying to trace a session from DB end....and seems like the job that the end user runs jumps from one session to another....in this senerio...how would i trace a session ??? i read article about dbms_monitor package to trace it...but as i mention, sap keep chaning the session from one to another.....
i read the below article...
http://ocsurabaya.wordpress.com/2007/07/18/tracing-sql-in-oracle-database-10g/
in which it suggest to set the service name and module name....but the problem is its hard to get the module name as its doing quite a few things....it jumps from one module to another....is there anyway to trace a session based on its CLIENT_IDENTIFIER (from v$session)....as this looks like the domian user account for that user who is running the job....
as i mentioned during that time(when job is ran)...the sid changes, modeule changes...the only thing consistent is the CLIENT_IDENTIFIER ( which seems to be the domian user name )...
so how can i trace a session based on CLIENT_IDENTIFIER ??user8363520 wrote:
Hello all,
i am on 11.2.0.1....we have a sap application and trying to trace a session from DB end....and seems like the job that the end user runs jumps from one session to another....in this senerio...how would i trace a session ??? i read article about dbms_monitor package to trace it...but as i mention, sap keep chaning the session from one to another.....
i read the below article...
http://ocsurabaya.wordpress.com/2007/07/18/tracing-sql-in-oracle-database-10g/
in which it suggest to set the service name and module name....but the problem is its hard to get the module name as its doing quite a few things....it jumps from one module to another....is there anyway to trace a session based on its CLIENT_IDENTIFIER (from v$session)....as this looks like the domian user account for that user who is running the job....
as i mentioned during that time(when job is ran)...the sid changes, modeule changes...the only thing consistent is the CLIENT_IDENTIFIER ( which seems to be the domian user name )...
so how can i trace a session based on CLIENT_IDENTIFIER ??is application 3-tier?
does application utilize connection pooling? -
CSS 11503 load-balancing with MS Print Servers
We are trying to load-balance print server connections between 2 MS print servers. When we try to connect to the print servers name, (\\PS01) or even the VIP address, we get a Path not found error. However, if we direct the path to the actual name or ip address of the print servers (not the VIP), we can view all the queues and connect/print to them. Is this possible to do on the CSS 11503? Thanks.
Pete- Here is our config. See any problems?
configure
!*************************** GLOBAL ***************************
ip route 0.0.0.0 0.0.0.0 1.100.100.100 1
!************************* INTERFACE *************************
interface 1/2
bridge vlan 2
!************************** CIRCUIT **************************
circuit VLAN1
ip address 1.100.101.110 255.0.0.0
circuit VLAN2
ip address 10.100.249.1 255.255.255.0
!************************** SERVICE **************************
service ps01
ip address 10.100.249.5
active
service ps02
ip address 10.100.249.6
active
!*************************** OWNER ***************************
owner printserver
content L3_Basic
add service ps01
add service ps02
vip address 1.100.100.35 -
CSS 11503 - question on version
We're about to do an annual OS update to our CSS 11503, and I noticed that there are two current versions of WebNS, both released in the same month: 8.10.4.01 and 8.20.2.01. Could anyone outline for me the differences between the two (or point me to the right release notes)? I usually upgrade to the latest release, but having two at the same time is awfully confusing.
Thank you!They are essentially the same.
We always port all fix to both of them.
Release notes are here :
http://www.cisco.com/en/US/docs/app_ntwk_services/data_center_app_services/css11500series/v8.10/release/note/RN810_X.html
http://www.cisco.com/en/US/docs/app_ntwk_services/data_center_app_services/css11500series/v8.20/release/note/RN820_X.html
Gilles. -
CSS 11503 in Active Active mode
Can we configure CSS 11503 in Active/Active mode, means can multiple context would be configured?
Thanks & Regards,
Shahzad.Here you go
Assumptions:
VIP 10.10.10.100 is Master on the CSS 2 and backup on the CSS1
VIP 10.10.10.101 is Master on the CSS1 and backup on the CSS1
Vlan 10 is the Server Vlan (Redundant Interfaces here)
Vlan 20 is the Client vlan (Redundant Vips here)
Services for VIP 10.10.10.100 (real server) have default gateway pointing to redundant interface 172.20.40.253
Services for VIP 10.10.10.101 (real server) have default gateway pointing to redundant interface 172.20.40.254
CSS #1
circuit VLAN10
ip address 172.20.40.1 255.255.255.0
ip virtual-router 1 priority 101 preempt
ip virtual-router 2
ip-redundant-interface 1 172.20.40.253
ip-redundant-interface 2 172.20.40.254
Circuit VLAN20
ip address 10.10.10.1 255.255.255.0
ip virtual-router 3 priority 101 preempt
ip virtual-router 4
ip redundant-vip 3 10.10.10.101
ip redundant-vip 4 10.10.10.100
CSS #2
circuit VLAN10
ip address 172.20.40.2 255.255.255.0
ip virtual-router 1
ip virtual-router 2 priority 101 preempt
ip-redundant-interface 1 172.20.40.253
ip-redundant-interface 2 172.20.40.254
Circuit VLAN20
ip address 10.10.10.2 255.255.255.0
ip virtual-router 3
ip virtual-router 4 priority 101 preempt
ip redundant-vip 3 10.10.10.101
ip redundant-vip 4 10.10.10.100
More details at
http://www.cisco.com/en/US/docs/app_ntwk_services/data_center_app_services/css11500series/v8.20_v8.10/configuration/redundancy/guide/VIPRedun.html#wp1112245
Syed Iftekhar Ahmed -
WS2012R2 - Session Based Printing Issues
So several months ago (four?) my organization moved and we upgraded all of our servers to 2012. We are a medical organization that uses terminal services aka RDS to rdp into a session based server to access our main clinical app. From this session,
the users need to print out various documents from that application. For printing, we have a print server that has all of the printers installed on it. Both users that use the remote session and users who do not access the printers through the
print server. The printers are deployed to each user via several GPOs so that they only get the printers that need access to. We do this mainly so people do not get confused with which printer to print to and so they do not send print jobs to our
other locations (connected through a WAN.) The main trouble we are having is with users on terminal server sessions. When I right click on a printer in the control panel of someone who is in a session, there are multiple copies of the same printer that
show up. It appears that our PDF application will not show these printers when this occurs.
I guess my main question is: in my organization's setup, what is the best way to set up the printers on the session server?
I was also wondering about the "Easy Print" driver? Is that something I need to enable/disable?
Lat me know of any clarifications I may need to make.
Thanks in advance.Hi,
Thank you for posting in Windows Server Forum.
Here providing you basic understanding to use Easy print driver.
RD Easy Print is a proxy for every print action that simply redirects all printing-related work to the user's local machine without the need to install any print drivers on the TS server. This system provides several benefits, such as being able to redirect
any printer from the user's client machine without having to reconfigure the server while still allowing the user to configure the print job as though he were printing on his client machine.
For your environment, you can use Easy print driver option also by which you don’t have to install printer driver on server.
For more information, you can refer beneath articles for detail.
Using Remote Desktop Easy Print in Windows 7 and Windows Server 2008 R2
http://blogs.msdn.com/b/rds/archive/2009/09/28/using-remote-desktop-easy-print-in-windows-7-and-windows-server-2008-r2.aspx
How to configure Microsoft RDS Universal Printing
http://www.virtualizationadmin.com/articles-tutorials/vdi-articles/microsoft-hyper-v/how-configure-microsoft-rds-universal-printing.html
Hope it helps!
Thanks.
Dharmesh Solanki
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