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Wednesday 12 June 2013

Secure Email (Outlook Express) with Digital Certificate

Part I: Export of Digital Certificate and Private Key


Login as administrator onto Certificate Server (Windows server 2003 with IP xxx.xxx.xxx.xxx) 

 Step-I.  Active Directory User Creation


            Start à Programs à Administrative Tools à Active directory users & computers à right click testcert.digitalcert.com à new à user à create user by giving required details.

Right click on newly created user à properties à Enter e-mail id for the user under       E-mail field à apply à OK

 Step-II. Digital Certificate Creation


            Open Internet Explorer with URL             http://xxx.xxx.xxx.xxx/certsrv  login with newly created username and password.

            Request a certificate à Advanced certificate request à Create and submit a request to this CA à Change following settings in the Advanced certificate request window, change to user in certificate template, enter friendly name as user name, click submit à yes (do you want to request a certificate now) à Install this certificate à yes (Do you want to add this certificate now) à close Internet Explorer after Certificate Installed message displays.

Step-III. Digital Certificate Export


Start à Programs à Administrative Tools à Certification Authority à testcertrootca (Under Certification Authority Console) à Issued certificates à Newly created certificate for the user will be shown in bottom, double click it à Details tab à copy to file à (Export wizard window will be displayed) next à Select Cryptographic message syntax standard PKCS#7 certificate and tick Include all certificates in the certification path if possible, click next à Enter file name, select file type as PKCS#7 (*.p7b) à Finish à OK à OK (Closes certificate window) à close Certification Authority console.

 Step-IV. Private Key Export

             Start à Run à In open box type certmgr.msc, click OK à  (Certificate manager console will be displayed) Personal à certificates à right click on newly created user certificate à all tasks à export à (Certificate Export wizard will be displayed) next à yes export the private key à next à enter password (give user name) à Enter file name, select file type as *.pfx à next à Finish à OK à Close certificate manager console 


Part-II.  Steps for Import and Configure of Digital Certificate into Outlook Express of a PC

  
Copy Digital certificates and Private Key from Certificate server to PC

Step-I. Import Private Key to Certificate Store


Open Internet Explorer à tools à internet options à content à certificate à advanced à tick all in certificate purpose à OK à Import à (Certificate Import wizard window will be displayed) next à Enter file name, *.pfx à enter password (give user name), click next à next à finish à OK (Import Successful) à close à OK (Closes Internet Options) à Close Internet Explorer.

Step-II. Import Digital Certificate to Certificate Store


Open Internet Explorer à tools à internet options à content à certificate à Import à (Certificate Import wizard window will be displayed) next à Enter file name, *.p7b à next à finish à yes (Do you want to add the following certificate to the root store) à OK (Import Successful) à close à OK (Closes Internet Options) à Close Internet Explorer.

Step-III. Configuring Digital Certificate into Outlook Express

            Open Outlook Express à tools à accounts à mail à select default mail à properties à security à under Signing Certificate, click select à Select newly issued certificate, click OK à under Encryption Preferences, click select à Select newly issued certificate, click OK à apply à OK à close (account properties window).

Step-IV. Adding Other email user Digital Certificate to Address Book



Open Outlook Express à tools à address book à check for entry of other user e-mail id, if not found, create a new contact by giving name and e-mail address à select and right click on user e-mail id à properties à digital id’s à import à enter file name, file type *.p7b à OK à close address book.


Tuesday 11 June 2013

Installation of Oracle 10g On RHEL5

Installation of Oracle 10g On RHEL5

Step 1:-- Disable the selinux.
Step 2:-- Turn of the iptables.
STEP 3:-- Create a hostname and domain name in the /etc/hosts file
Step 4:-- Set the kernel parameters

#vim  /etc/sysctl.conf
Kernel.shmall  =  2097152
kernel.shmmax  =  2147483648
kernel.shmmni  =  4096
kernel.sem   =  250  32000 100  128
Fs.file-max = 65536
net.ipv4.ip_local_port_range = 1024 65000
net.core.rmem_default  = 262144
net.core.rmem_max  =  262144
net.core.wmem_default   =  262144
net.core.wmem_max   =  262144

step 5 :-- Run the following command to change the current kernel parameters
#/sbin/sysctl  -p

Step 6 :-- Add  the following line into the /etc/pam.d/login

#vim  /etc/pam.d/login
session        required             pam_limits.so

step 7:-- Install  the  binary packages required. 

binutils-2.17.50.0.6-14.el5.x86_64.rpm
Compat-db-4.2.52-5.1.i386.rpm
Compat-db-4.2.52-5.1.x86_64.rpm
Compat-gcc-34-3.4.6-4.x86_64.rpm
Compat-gcc-34-c++-3.4.6-4.x86_64.rpm
Compat-libstdc++-33-3.2.3-61.i386.rpm
Compat-libstdc++-33-3.2.3-61.x86_64.rpm
Cpp-4.1.2-48.el5.x86_64.rpm
Elfutils-libelf-0.137-3.el5.i386.rpm
Elfutils-libelf-0.137-3.el5.x86_64.rpm
Gcc-4.1.2-48.el5.x86_64.rpm
gcc-c++-4.1.2-48.el5.x86_64.rpm
glibc-2.5-49.i686.rpm
glibc-2.5-49.x86_64.rpm
glibc-devel-2.5-49.i386.rpm
glibc-devel-2.5-49.x86_64.rpm
glibc-headers-2.5-49.x86_64.rpm
kernel-headers-2.6.18-194.el5.x86_64.rpm
ksh-20100202-1.el5.x86_64.rpm
libaio-0.3.106-5.i386.rpm
libaio-0.3.106-5.x86_64.rpm
libaio-devel-0.3.106-5.i386.rpm
libaio-devel-0.3.106-5.x86_64.rpm
libgomp-4.4.0-6.el5.x86_64.rpm
libstdc++-4.1.2-48.el5.i386.rpm
listed++-4.1.2-48.el5.x86_64.rpm
libstdc++-devel-4.1.2-48.el5.x86_64.rpm
libXmu-1.0.2-5.i386.rpm
libXp-1.0.0-8.1.el5.i386.rpm
libXp-1.0.0-8.1.el5.x86_64.rpm
make-3.81-3.el5.x86_64.rpm
openmotif-2.3.1-2.el5_4.1.i386.rpm
openmotif-2.3.1-2.el5_4.1.x86_64.rpm
setarch-2.0-1.1.x86_64.rpm

step8 :-- create a users and groups

#groupadd  oinstall
#groupadd dba
#useradd  -g dba  -G  oinstall  oracle

Step9 :-- create a directories in which oracle software installed.

#mkdir  -p  /oracle/product/10.2.0/db_1

Step10 :-- change the owner and primary group of a oracle installation  directory.

#chown –R    oracle:dba /oracle

Step 11:-- Run the command following command hostname being added to access control list

#xhost  ora10g.xyz.com

Step 12:-- Login as the oracle user and add the following lines at the end of the .bash_profile

#vim  .bash_profile

TMP=/tmp;  export TMP
TMPDIR=$TMP;  export  TMPDIR
ORACLE_BASE=/ora10g/oracle; export  ORACLE_BASE
ORACLE_HOME=$ORACLE_BASE/product/10.2.0/db_1; export  ORACLE_HOME
ORACLE_SID=orcl; export  ORACLE_SID
ORACLE_TERM=xterm; export  ORACLE_TERM
PATH=/usr/sbin:$PATH; export PATH
PATH=$ORACLE_HOME/bin:$PATH; export PATH
LD_LIBRARY_PATH=$ORACLE_HOME/lib:/lib:/usr/lib;  export  LD_LIBRARY_PATH
CLASSPATH=$ORACLE_HOME/JRE:$ORACLE_HOME/jlib:$ORACLE_HOME/rdbms/jlib; export CLASSPATH

NOTE :please enter carefully above directory path, while installation we have to mention the same path.

Step 13:-- Save the .bash_profile and execute the following command to load new environment.

#.   .bash_profile

Step14  :login as the oracle user. If you are using X emulation then display the variable.
DISPLAY=ora10g.xyz.com:0.0;  export DISPLAY

Step 15:-- uncheck the file into temporary directory.

#gunzip  10201_database_linux_x86_64.cpio.gz
#cpio   -idmv  <  10201_database_linux_x86_64.cpio

Step 16:--  Change  the redhat release version from 5 to 4

#vim  /etc/redhat-release
 Red Hat Enterprise Linux Server release 4.0

Step 17 :-- start the oracle universal installer by issuing the following command in the  database directory

./runinstaller
Select the following options while installing
Installation type : standard edition
Unix dba group oinstall
Global database name orcl
Database password : ********

POST-INSTALLATION TASK

Step 1:--#vim  /etc/oratab
Login as root and modify /etc/oratab file and change file and change the last character to Y for appropriate database.

Step 2:-- As root user create a new file “oracle” (init script start and shutdown the database) in /etc/init.d/directory with following content

#vim  /etc/init.d/oracle
#!/bin/bash
#
#oracle Init file for starting and stopping
#oracle Database. Script is valid for 10g and 11g versions.
#
#chkconfig: 35 80 30
# description: Oracle Database startup script
#Source function library.
./etc/rc.d/init.d/functions
ORACLE_OWNER="oracle"
ORACLE_HOME="/ora10g/oracle/product/10.2.0/db_1"
case "$1" in
Start)
echo -n $"Starting Oracle DB:"
su - $ORACLE_OWNER -c "$ORACLE_HOME/bin/dbstart $ORACLE_HOME"
echo "ok"
;;      
stop)  
echo -n $"Stopping Oracle DB"
su - $ORACLE_OWNER -c "$ORACLE_HOME/bin/dbshut $ORACLE_HOME"
echo "ok"
;;
*)
echo $"Usage: $0 {start|stop}"
esac
step 3:-- add the oracle to the run levels
#chkconfig   --add oracle
Step 4:-- permanently on the oracle to the run levels
#chkconfig –oracle on