KeepAlive in infrastructure tier vs midtier

Hello,
Does anyone have examples of the httpd.conf setttings for both the midtier and infrastructure tier for an environment expecting maybe 1000 connections?
Specifically looking for things associated with KeepAlive ... when the database is on a seperate server.
Thanks

Default Keep Alive settings in httpd.conf are
Moddle Tier:
KeepAlive On
MaxKeepAliveRequests 100
KeepAliveTimeout 15
Infrastructure Tier:
KeepAlive Off
MaxKeepAliveRequests 100
KeepAliveTimeout 15
Basically, Keep Alive is used in the middle tier apps (mostly) front ended by WebCache.
Keep Alive is not required on Infrastructure as login sessions are not persistent connection to the server.
HTH,
Raj Mareddi
http://www.freeoraclehelp.com

Similar Messages

Mid-tier, Infrastructure-tier - Same host or not

I used to remember that on version 9i -> 9.0.2, if install the whole version, Oracle recommended to install mid-tier on one machine, and infrastructure tier on another machine. Does Oracle recommend that different hosts for mid tier and infra tier on 9.0.4 or on new release 10.1.2?
It seems there are some advantages of install these two tiers on the same machine. but different Oracle homes.
Please comment.
Thanks,
Joanne

Thank you for you postings - The Member Feedback forum is not monitored by Oracle support or product teams and so Oracle product and technology related questions cannot be answered. However we recommend that you post this thread to the "Database - Installation" forum.
The URL is: Database Installation
Thanks - The OTN team

Cannot start the "Internet Directory" service for the infrastructure tier

Hi, my "Internet Directory" service for the infrastructure tier cannot be started. I'm using 9iAS for Form service. Could anybody help me??
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Hi Brain,
what's version of SQL Server that you have installed and what's your operationg system version info?
If you are running SQL Server 2008, which is not supported on the Windows Server 2008/2008 R2 domain controll (DC), even on Windows Server 2003 DC, there are limitations. Microsoft does not recommend to install SQL Server instances and DC on the same server,
for more information, see Install SQL Server on a Domain Controller (http://msdn.microsoft.com/en-us/library/ms143506.aspx#DC_Support).
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http://social.technet.microsoft.com/Forums/en-US/sqlsetupandupgrade/thread/1a2963ff-90d7-4bba-97ce-fa15f70fb6a8/
http://social.technet.microsoft.com/Forums/en-US/sqlsetupandupgrade/thread/981ef726-d04a-4063-8008-cc7bbad854ab/
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Please remember to click "Mark as Answer" on the post that helps you, and to click "Unmark as Answer" if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.

Can i install Ora9iAS Infrastructure and Ora9iAS Midtier in same machine??

Hello,
I want to clarify whether i can install the Ora9iAS infrastucture and Ora9iAS midtier in the same machine?? Since i try to install but giving error on this
Unable to verify connection to this OID instance. Please verify your Hostname, Port, username and Password or verify that the OID services is running.
I'm not sure whether there is anything wrong?? Please help.
Thanks.

Hi,
Yes you can install Oracle9iAS Infrastructure and Middletier on same m/c. However you need to install both of these in different oracle home and install infrastructure prior to middletier.
Regarding to your problem...
During middletier installation you will be prompted for infrastructure hostname and port number. Ensure that you enter just the 'hostname' and NOT 'http://host'
Also check that 'host' file on the server machine is updated. This file is located at C:\WINNT\system32\drivers\etc. You have to make entry for ip address and hostname in this file.
Another note: Oracle9iAS installation needs 'fully qualified hostname'. i.e. just 'myhost' won't work. try myhost.mycompany.com
Your host file entry will look like
80.81.82.83 myhost.mycompany.com
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Regards,
Rakesh

De-installing 9iAS infrastructure tier

I have a server that has the 9iAS infrastructure installed. None of the 9iAS mid-tier instances require SSO or clustering. The questions I have is:
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Thanks
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However, once you have associated any mid tier with infrastructure, it is not supported to remove the infrastructure except in one case. If you want to use FOrms and Reports without Infrastructure, following the instructions you can find in the white paper available on OTN, you can remove Infrastructure. This means you will not be able to use SSO capabilities with forms and reports.
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Oracle9iAS Product Manager

Patching mid tier and infrastructure tiers.

Greetings!!!
I am having some questions on patches and hope someone can help me here.
We have two Oracle Application Server machines both on Windows 2003 servers 32-bit and both are on 10.1.2.0.2 release.
The first machine is hosting HTTP Server, Forms (OC4J_BI_Forms), Reports, Webcache (Application/Mid tier). Release is 10.1.2.0.2
The second machine is hosting OID+Metadata repository, Single Sign-On, HTTP Server, and OC4J_Security (Infrastructure Tier). Release is 10.1.2.0.2.
I am now applying patches to both the servers.
Here are the steps I have:
1. Apply the Patch 4505133 on the Infrastructure (10.1.0.5 Patch Set)
2. Apply the Patch 5983622 on the Mid-tier. (10.1.3 patch set)
I have already completed step (1). I patched the infrastructure database from 10.1.0.4 to 10.1.0.5.
Am I missing the other step to patch Infrastructure tier components? Should I also patch the HTTP Server and the Oracle Home on infrastructure tier? I am not talking about the infrastructure database here. I am already done with that step.
If I only patch the Mid Tier with #5983622, then won't the mid tier will be on 10.1.3 release and infrastructure components (HTTP Server, SSO) will be on the same old 10.1.2.0.2.
The primary requirement is that I need to upgrade HTTP servers on both the tiers to the same level. Can you suggest me the equivalent of patch 5983622 for infrastructure tier and the way forward? Will appreciate any answers!!! TY.

Hello,
I think u are mixing some things here.
In order to apply 5983622, u have to update database version is 10.1.0.4 to 10.1.0.5. (patch 4505133) That must be done before patching the two homes of Application Server.
Patch 5983622 is for Application Server. U have to apply it on Infrastructure Tier and on Application/Mid tier Home, in order to update Application Server from 10.1.2.2 to 10.1.2.3.
regards,
Pedro

Middle tier and infrastructure location

Hi ,
Does Middle Tier and Infrastructure tier should be on seperate Tier or can they installed on one Tier?
Thanks

They are normally kept separate for security reasons (and sometimes the middle tier is broken out into OHS and OC4J tiers too), though this will mean there are more servers to license.
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Two Middle Tiers - One Infrastructure

I have three windows servers. The first server is the infrastructure tier and the second server is the middle tier with Portal. I have installed a second middle tier with Portal on the third server and attached it to the infrastructure server that the first middle tier is using. However, Portal will not run. All other services are up except for Portal. Is it possible to have two separate middle tiers (one a development area and one a test area) that both connect to the same infrastructure server? If so, what am I doing wrong.
Thank you....Stacy

It was a walk in the park really...
Step 1 is to apply the 10.1.0.5 DB update to your infrastructure DB (that was the longest part). After that, you just run the OUI for 10.1.2.2 on the midtiers, and then the infrastructure before doing the MRUA.
Only kickers -
During 10.1.2.2 application, my midtiers were configured for http on 80 and https on 443 requiring that the .apachectl and webcache were owned by root. As a result, you'll get an error about writing to those files during the patch application. I just renamed the originals and clicked retry and the file was replaced with the new one.
Following that, you'll have to redo the web cache setroot script and reset the ownership on the .apachectl file to root again.
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Problem in starting infrastructure and middletier

on application server 10gAS(10.1.2.0.2) changed listener port number both on infrastructure tier and middletier. now when i run opmnctl startall command on infrastructure tier its taking too long than usual. please tell me whats the reason

I take it, this is the OHS listener port you've changed (if it is both on the mid-tier and infrastructure); if so, there are additional steps such as re-registering the SSO, Portal, WebCache configuration, etc. Please refer to the doscumentation for changing listener port/settings:
http://download.oracle.com/docs/cd/B16045_03/install.1012/install/http_ports.htm
Thanks,
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Changing the port number in 10g Discoverer- Middle Tier & Infrasctructural

Earlier I had insalled 10g discoverer which incudes both Middle Tier & Infrastructural Tier with default port numbers.
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In this case i have one question. Is it required to change all the port numbers that exist in the file "portlist.ini" of both Middle Tier & Infrastructural Tier.
What change still i need to do in Oracle 11i application front.
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Naveen

I did troubleshooting to verify the group, but this just changed the port number back to the default in the listener.ora & tnsnames.ora.
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How to Configure Multiple Portal Middle Tiers with a Load Balancing Router

Hi,
Portal version trying to install 10.1.2 on Windows 2003 boxes.
I am following the guide http://download.oracle.com/docs/cd/B14099_19/portal.1012/b14037/cg_advnc.htm#i1046354. I have InfraStructure installed on a different box and am trying to install 2 Portal Midtiers each on separate boxes and using LBR. The above document is kind of confusing as I am trying to following
5.3.1 Step 1: Install a Single Portal and Wireless Middle Tier (M1)
5.3.2 Step 2: Configure OracleAS Portal on M1 to Be Accessed Through the LBR (AND FOLLOW ARE THE STEPS 1 to 14 in sequence)
if I follow 1 to 14 steps in sequence the information is not consistent what is being listed in the following sections
5.4.1 Create Virtual Hosts
5.4.2 Configure OracleAS Web Cache
5.4.3 Register OracleAS Portal with OracleAS Single Sign-On
i.e.
ptlconfig -dad portal -sso -host www.abc.com -port 7779
ptlconfig -dad portal -sso -host www.xyz.com -port 7779
as in the above steps it says to run
ptlconfig -dad portal -wc -site
and ssoreg command that always fails because I am running it from midtier as it gives error saying invalid username/password
as oppoesed to steps listed in point 8, 9, 10, 11 and 12.
Can someone please privide the steps in sequence I need to follow when installing 2 midtiers with frontend LBR and one infrastructure. I am trying to follow the architecture listed in the above link.
Any help is really appreciated.
Thanks

Hi,
Will appreciate any inputs on the following.
I am planning to install Infrastructure and one Midtier BI Forms Reports Discoverer, Portal on one windows box and the second midtier BI Forms Discoverer, Portal on the second windows box.
Please correct me if I am wrong on installing and configuring the mid-tiers as following are the steps I have compiled going through the document and want to make sure this time I do it right.
As I'll be installing BI Forms Reports Discoverer, Portal so wondering when I install the second midtier do I need to unselect all Portal, Forms, Reports, Discoverer or just the Portal I need to unselect.
Also in the host file of both the windows boxes do I just need to keep the LBR IP Address entry and remove the rest.
LBR:_
Computer Name: bigip5.prd.com
IP Address: *167.123.2.5*
Listen Port: *80*
Invaidation Port: *9401*
Infrastructure:_
Computer Name: portal1.prd.com
IP Address: *167.123.2.6*
Oracle HTTP Server Listening Port: *7777*
Application Server Control port: *1800*
M1 (Portal & BI Forms Reports Discoverer):_
Computer Name: portal1.prd.com
IP Address: *167.123.2.6*
Oracle HTTP Server Listening Port: *7778*
OracleAS Web Cache Listening Port: *80*
OracleAS Web Cache Invalidation Port: *9401*
OracleAS Web Cache Administration Port: *9400*
Web Cache Statistics port: *9402*
Application Server Control port: *1810*
M2 (Portal & BI Forms Reports Discoverer):_
Computer Name: portal2.prd.com
IP Address: *167.123.2.7*
Oracle HTTP Server Listening Port: *7778*
OracleAS Web Cache Listening Port: *80*
OracleAS Web Cache Invalidation Port: *9401*
OracleAS Web Cache Administration Port: *9400*
Web Cache Statistics port: *9402*
Application Server Control port: *1810*
First to create MetadataRepository and then Install Infrastructure and then follow the below steps to install Midtiers
Install and Configure of M1 (Portal and BI Forms Reports Discoverer):-_
*5.3.1 Step 1*: Install a Single Portal and BI Forms Reports Discoverer (M1 i.e. portal1.prd.com)
*5.3.2 Step 2*: Configure OracleAS Portal and BI Forms Reports Discoverer on M1 to Be Accessed Through the LBR
*1.* Configure LBR
*2.* Follow Section 5.4.1.1 to create the Virtual Host for bigip5.prd.com (LBR) and portal1.prd.com (M1)
*3.* Define a site that matches the virtual host entry for bigip5.prd.com (LBR) on Webcache of M1
*4.* Use OracleAS Web Cache Manager on M1, to map the site bigip5.prd.com (LBR) to middle tier portal1.prd.com (M1).
Follow steps 5 and 6 as per the document
*7.* Configure bigip5.prd.com (LBR) to accept invalidation requests from the OracleAS Metadata Repository on a separate port i.e. 9401
*8.* Change iasconfig.xml on M1
*9.* run ptlconfig -encrypt
*10.* Register the URL changes with OracleAS Portal by running ptlconfig -dad portal -wc -site
*11.* No need as it is http only
*12.* Run the follwoing
MID_TIER_ORACLE_HOME_M1\sso\bin\ssoreg.bat
-site_name bigip5.prd.com
-mod_osso_url http://bigip5.prd.com:80
-config_mod_osso TRUE
-oracle_home_path MID_TIER_ORACLE_HOME_M1
-config_file MID_TIER_ORACLE_HOME_M1\Apache\Apache\conf\osso\osso.conf
-admin_info cn=orcladmin
-virtualhost
*13.* Edit targets.xml to enable monitoring of the LBR's front-end host and port settings for OracleAS Portal
+<Property NAME="PortalListeningHostPort" VALUE=http://bigip5.prd.com:80/>+ and then run
MID_TIER_ORACLE_HOME_M1\bin\emctl reload
*14.* Test the setup
Install and Configure of M2 (Portal and BI Forms Reports Discoverer):-_
*5.3.4 Step 4*: Install a Single Portal and BI Forms Reports Discoverer (M2 i.e. portal2.prd.com)
*1.* As I am installing on wiondows so will not set IASCONFIG_LOC environment variable as I can just copy the iasconfig.xml file from M1 to M2
*2.* Run OUI on M2
*3.* Clear the selection for OracleAS Portal but don't know if I need to unselect Forms , Reports, Discoverer also.
*4.* Enable OracleAS Portal
*5.3.5 Step 5:* Configure the New Middle Tier (M2) to Run Your Existing Portal
*1.* Create both virtual hosts as done on M1
*2.* Copy dads.conf, oradav.conf, cache.conf, web.xml from M1 to M2
*3.* Re-register mod_osso on M2. To do this, perform the following steps by copying osso.conf from M1 to M2
*4.* Synchronize the DCM by using the following command
MID_TIER_ORACLE_HOME_M2/Apache/Apache/bin/ssotransfer MID_TIER_ORACLE_HOME_M2/Apache/Apache/conf/osso/osso.conf
*5.* Run dcmctl updateConfig
*6.* add the necessary mod_rewrite and mod_oc4j directives to the httpd.conf and mod_oc4j.conf files respectively
*7.* Restart Oracle HTTP Server on M2
*8.* Access the OracleAS Web Cache Manager on M1 and follow steps 9,10,11,12,13,14,15,16 for Webcache seetings and clustering.
Also will appreciate if can get some info on the following:
*1.*
When I configure the Webcache as per the Document but if I bring down one Midtier Instance the requests are not going to the other Instance that is up and ignores the case whether an instance is down. Any idea how what and where do I need to provide any setting which in case of instance is down routes the requests to the one that is up.
*2.*
What exactly happens when it says To enable monitoring of the LBR's front-end host and port settings for OracleAS Portal edit target.xml. Is this for LBR to find if an Instance is down or not and route the requests appropriately.
Thanks again for all the help.

Multiple Domains with one single Portal

We have installed Oracle Infrastructure and Oracle Midtier on one box. Let's say the domain name is http://www.abc.com. When we query http://www.abc.com, it
goes to the SSO (Infra) and validates the username and password and takes it back to the Mid-Tier Portal Pages. At this junction, everything is working as expected.
Now, we created two more webpages and they correspond to two domains -- let's say http://www.pqr.com and http://www.xyz.com. The two webpages that got created were PUBLIC pages, so anybody can have access to those pages.
Can we implement our requirements using one infrastructure and one midtier (1st)installation? OR do we install two more midtier (2nd, 3rd) to correspond
to each domain name which are www.pqr.com and www.xyz.com and then have the proxy server redirect the request for www.abc.com to 1st-Midtier, www.pqr.com
to 2nd-Midtier and www.xyz.com to 3rd-Midtier?
We have a apache proxy server installed in front of the 9iAS, but we are going to use it just for redirection.
I understand Oracle Infrastructure has only ONE portal Schema and so how would multiple midtier (webpages) will reside? Do I need to create another PORTAL repository and a new DAD, so that www.pqr.com points to the 2nd-Portal Repository and www.xyz.com points to the 3rd-portal?

Through a single mid-tier it is possible to configure Oracle HTTP Server/Web Cache such that they are configured to handle multiple logical site names (e.g. www.pqr.com and www.xyz.com) by using Virtual Hosts.
In terms of a single Portal Repository being accessed by multiple mid-tiers (or logical sites), this is not currently possible since the Portal Repository is configured with only one set of site details.
For further information on configuring Virtual Hosts and Portal see the Advanced Chapter of the 10g Portal configuration guide...
http://download-west.oracle.com/docs/cd/B10464_01/portal.904/b10356/cg_advnc.htm#1040267

Email and Calendar Portlets

I am looking for some prebuilt portlets and associated JSPs that will allow
access to a mail server using Java Mail. I could not find anything on the
developer center and was hoping that someone might have a catalog of off the
shelf portlets somewhere. A calendaring portlet would be pretty useful as
well.

My install was on Redhat 7.3 from the iso disk images available on redhat.com. I considered downgrading my kernel, but I'm not that strong with Linux so worked with what I had. The only linux change I made was to install a ksh rpm which is mandatory. I had changed kernel parameters but don't think that it really matters for installation purposes.
The install that I have running at the moment was the simplest I could think of and only has an infrastructure tier and a middle tier, and I installed in the midtier install, portal, wireless and calendar. For both installs I change genclntsh as has been referenced in other notes in this forum. After my infrastructure install I made modifications to the listener, http, https and ldap components of the install. I also rebooted between midtier and infrastructure installs, and then started infrastructure components manually. I also deleted /etc/emtab file so that Enterprise Manager will be installed for the midtier. None of this seems to be documented very well in any of the Install guides/release notes etc, and I only got there with some help from other people who have access to MetaLink. Further there is nothing documented about how to stop/start/verify an OCS installation. Anyway, once the required infrastructure components are started, the midtier install seems to run fine, although for some reason I sometimes have to copy extproc from the infrastructure bin directory to the midtier bin directory.
Anyway, I got it running eventually and the calendar server seems to be doing what I want but it was a lot of effort for not much value above the plain infrastructure if you ask me. I'm confused why there needs to be three tiers anyway, as the infra and midtiers especially seem to install the same things. Couldn't they two tiers have been consolidated in some way?
I would be interested in what other people percieve as the value of collaboration suite and how they are planning on using it.
regards,
Anthony.

What order to patch up my application server?

Hi,
I'm looking for advice on the pathways by which to patch up my oracle application server. it consists of the following components:
10.1.0.5 Infrastructure database
10.1.4.0.1 Identity Management
10.1.2.0.2 Middle Tier
I would like to be able to perform the critical patches on these components however for all except the database I believe that the versions are too low and may need some intermediate patching first. Can anyone give me the upgrade path - order and patch versions - to apply to these components to bring them all to the level where I can perform the critical patches for April 09?
Thanks
Adam

Adam J Sawyer wrote:
Hi,
Our infra/identity management was installed along with the metadata repository as part of the 10.1.2.0.2 mid tier installation - is it still necessary to patch it individually or can infra/metadata be patched together as one product?
Thanks
Adam
Edited by: Adam J Sawyer on Jun 9, 2009 8:25 PMYour case is called a CoLocated infrastructure architecture with both IdMgmt and MetRep sitting on the same instance.
1. As an instance, they can be patched together. But that means the software upgrade of the instance which holds both of them can be patched together in one shot.
2. However, it does not mean that the Metadata Repository is also upgraded that way. Metadata Repository is upgraded once all instances (all infrastructures and all midtiers both - even if you have multiple ones for them) are already upgraded.
3. And I insist, the Order of application of various steps in this Patch Set is important. (See my previous message and compare with the documentation).
The Software Upgrades have to be applied first on all instances, and Metadata Repository Upgrade must be applied later.
Read the documentation referred to about Patch Set 3 carefully about it.
hope that helps!
AMN

Configuring a Apache Reverse Proxy for OracleAS Portal and OracleAS Single

I'm trying to implement my Oracle Portal 10g Release 2 with a reverse proxy (Apache 2.2) as described in this link: http://download.oracle.com/docs/cd/B14099_19/core.1012/b13998/variants.htm#BEIFECEH without success. I have Oracle Portal, Oracle SSO,OID in the same domain and Apache Reverse Proxy in another domain. Has anyone had success using OracleAS Portal with a reverse proxy?

First of all i'm trying to configure a reverse proxy only for Ora SSO (infra tier). Here is what i already do:
APACHE REVERSE PROXY (Apache 2.2)
http:/proxy.mycompany.com:80
ProxyRequests off
ProxyPassInterpolateEnv On
ProxyPass / http:/portal.tech.everett.it:7777/
ProxyPassReverse / http:/portal.tech.everett.it:7777/
ProxyPreserveHost On
ORACLE SSO
http:/portal.mycompany.com:7777
Here are the steps i already do:
1- CONFIG OID
create an ldif file called setdasurl.ldif and insert as follow:
dn:cn=OperationURLs,cn=DAS,cn=Products,cn=OracleContext
changetype: modify
replace: orcldasurlbase
orcldasurlbase: http:/proxy.mycompany.com/
then do ldapmodify as follow:
ldapmodify -x -h portal.mycompany.com -p 3060 -D "cn=orcladmin" -w password1 -v -f setdasurl.ldif
2- CONFIG ORA SSO (as gentjan user)
export ORACLE_HOME=/home/gentjan/product/10.1.2/OracleAS/infra/
2.1-config Apache config of ORA SSO
vi $ORACLE_HOME/Apache/Apache/conf/httpd.conf
change from:
ServerName portal.mycompany.com
Port 7777
KeepAlive On
to:
ServerName proxy.mycompany.com
Port 80
KeepAlive Off
and add at the end of httpd.conf
RewriteEngine On
RewriteOptions inherit
2.2- update DCM Repository (as root)
*$ORACLE_HOME/dcm/bin/dcmctl updateconfig -ct HTTP_Server -v -d*
2.3- modify SSO Server Home URL to reverse proxy hostname and port (as root)
*$ORACLE_HOME/sso/bin/ssocfg.sh http proxy.mycompany.com 80*
2.4- Updating the targets.xml File
Open the ORACLE_HOME/sysman/emd/targets.xml file and locate the target type oracle_sso_server.
vi $ORACLE_HOME/sysman/emd/targets.xml
Update the HTTPMachine and HTTPPort attributes with the proxy server host and port attributes that were passed to ssocfg. For example:
Property NAME="HTTPMachine" VALUE="proxy.mycompany.com"
Property NAME="HTTPPort" VALUE="80"
Property NAME="HTTPProtocol" VALUE="http"
Save and close the file.
Reload the Application Server Control Console by issuing this command (as gentjan):
*$ORACLE_HOME/bin/emctl reload*
2.5- Re-register mod_osso on SSO Middle-tier with reverse proxy hostname and port
some needed permissions
chmod -R 775 /home/gentjan/product/10.1.2/OracleAS/infra/dcm/
Re-register mod_osso (as gentjan)
*$ORACLE_HOME/sso/bin/ssoreg.sh -oracle_home_path /home/gentjan/product/10.1.2/OracleAS/infra -site_name infra.proxy.mycompany.com -config_mod_osso TRUE -mod_osso_url http:/proxy.mycompany.com:80 -update_mode MODIFY*
2.6- update DCM Repository (as root)
*$ORACLE_HOME/dcm/bin/dcmctl updateconfig -ct HTTP_Server -v -d*
2.7- Restart OC4J_Security and Oracle HTTP Server at Infrastructure tier
*$ORACLE_HOME/opmn/bin/opmnctl restartproc process-type=HTTP_Server*
*$ORACLE_HOME/opmn/bin/opmnctl restartproc process-type=OC4J_SECURITY*
After this modifications my reverse proxy is ok.
I can access to http:/proxy.mycompany.com:80 and this redirect me to Oracle Application Server Welcome page.
If i try http:/proxy.mycompany.com/pls/orasso/orasso.home, i can view the SSO Server Home page.
The problem that i find is when i click to Login page for Oracle SSO.
I have the following error:
Forbidden You don't have permission to access /pls/orasso/ORASSO.wwsec_app_priv.login on this server.
So, in other words i can't do the login/logout under reverse proxy. Anyone can help?
Gentjan

KeepAlive in infrastructure tier vs midtier

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