Integration

I have one linux server with

Oracle application server
Oracle HTMLDB application
OID

I need to relocate the server, i am trying to figure out what installed on the application server i check ias.properties and shows the install type=infrastructure

The steps on changing the infrastructre IP address ,mentioned about middle tier
i dont know what is middle tier .i am trying to figure out what is installed on the server so that i can change the IP address

I have OID installed but i dont have cn=orcladmin password.

i will show you my ias.properties file
=========================================
Apache.LaunchSuccess=true
J2EE.LaunchSuccess=true
WebCache.LaunchSuccess=false
JServ.LaunchSuccess=false
Portal.LaunchSuccess=false
Wireless.LaunchSuccess=false
Discoverer.LaunchSuccess=false
Personalization.LaunchSuccess=false
Forms.LaunchSuccess=false
Reports.LaunchSuccess=false
UnifiedMessaging.LaunchSuccess=false
SSO.LaunchSuccess=false
OID.LaunchSuccess=true
DAS.LaunchSuccess=false
DIP.LaunchSuccess=false
OCA.LaunchSuccess=false
ProcessConnect.LaunchSuccess=false
IntegrationB2B.LaunchSuccess=false
WORKFLOW.LaunchSuccess=false
MODOSSO.LaunchSuccess=false
JAZN.LaunchSuccess=false
IntegrationBAM.LaunchSuccess=false
[InstallData]
Version=10.1.2.0.2
InstallType=Infrastructure
Components=Apache,J2EE,JServ,SSO,OID,DAS,DIP,OCA
IASname=oasrep01.usa-k009.usa.loc
InstanceNamesList=oasrep01.usa-k009.usa.loc
IASpassword=054131b10477be2e1dea50172b4ae319d07ae0f62a1da80224
IASSvcpassword=
UserName=
InfrastructureUse=true
DatabaseManagedClusterSupport=true
OIDhost=usa-k009.usac.loc
OIDport=389
OIDsslport=636
SSLOnly=false
VirtualHostName=usa-k009.usac.loc
InfrastructureInstallOnRAC=false
JRERuntime=/u01/app/oracle/OAS10G/JRE/bin/jre
JRELocation=/u01/app/oracle/OAS10G/JRE
[InfraStructureDatabase]
InfrastructureDBCommonName=oasrep01.usa.loc
[EMConfigData]
IMAdminSupported=true
IMServerLocConfigurable=False
IMReposAdminSupported=True
CentralAdminSupported=True
MRAdminSupported=False
FarmAdminSupported=False