Amazon

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


Tuesday 30 April 2013

Configuring XDMCP on RHEL 6


HOW TO ENABLE XDMCP ON RHEL6

 


Step 1 : Disable the selinux. (#vim  /etc/selinux/config)


Step 2 : Turn of the ip tables. (#iptables –F   #service iptables save)


Step3 : Edit the following configuration file

            #vim /etc/X11/xdm/xdm-config

            # *                                 #any host can get a login 
window(uncomment this line)


Step4 :#vim   /etc/X11/xdm/xdm-config

  #!DisplayManager.requestport:          0 (comment this line )


Step 5: #vim  /etc/gdm/custom.conf (edit the followingconfiguration file)

[daemon]

[security]

DisallowTcp=false

[xdmcp]

Enable=true

[greeter]

[chooser]

[debug]


Step6 : Restart the service. (#init 6)

Configuring XDMCP on RHEL 5


Configuring xdmcp on rhel5




Step1) flush the iptables .

Step2) disable the selinux (vim /etc/sysconfig/selinux disabled)

Step3) run the command gdmsetup. Then it shows the following options.

1) local  :---

     Select the following options


                                 Style    : Themed

                                Theme  : selected only

     Select  the following options in menu bar


                                  1) show  actions menu

                                  2) include configure menu item

                                  3) include hostname chooser(XDMCP) menu item.

     Select the following option in welcome message


                                  1) select  Default “welcome”                                   

 2) remote  :---

    Select the following options


                                     Style  :  plain

    Select the following option in welcome message


                                  1) select  Default : welcome %n

 3) accessibility :---

     Select  the following option


                                  1) Enable access login.

     Select the following option in themes


                                  1) Enable users to change the fonts and colors of plain greeter.

     Select the following option in sounds


1)     select the login screen ready  in sounds





4) security :----

     Select the following options in security


                                 1) Allow local  system administration login

                                 2) Allow remote system administration login

                                 3) Enable debug messages to system log

5) users :----

      Select the following option   


                                1) Select the include  all  users  from /etc/passwd (not for nis)

                                2) Then close it .

step4) run the command  gdm-restart.

Step5) Then it goes to the log in mode.