Eg: nslookup google.com 8.8.8.8 (Here it is trying to get IP address of Google from Googles dns server.) Here is the wrong output.

How to solve it

If you are trying to query the domain name and specify a different DNS server other than the network settings, then you need to append a Dot “.” in the end of the domain name which you want to search. This example is with a one line query, use the same method if you are testing from inside the nslookup command.

Eg : nslookup google.com. 8.8.8.8

Hardware spec

Dual Sim LTE (Dual Standby)

One-Hand UI

feature gives facility to handle the 5.5 screen in a better way. Just enable and swipe in the navigation bar to reduce the screen size. It gives good handling experience for me.

Protected apps

feature helps to restrict background usage of apps while the screen is off, which saves battery usage and Internet. This has really helped me. I usually achieve this feature by installing third party application like Greenify.

Networked Apps

 feature provide control over Internet data usage of individual applications. The choice of mobile data or wifi for individual application lies with us. For example you can restrict mobile data usage of applications like Gaming apps, and E-commerce apps.

Fingerprint Scanner

After a VMware migration from version 4.5 to 5.5, I struck-up in the installation of VMware Data Protection (VDP) 6.1.1. The deployment of VDP appliance got succeeded. But while configuring the appliance through the web browser (link : https://vdp.example.com:8543/vdp-configure/), it return an error.

“IP/DNS could not be resolved. Please check the hostname, domain, and DNS values for forward and reverse lookup validation”

Here are some testing results and diagnosing methods which I used to find the root cause of the error. This may help someone to troubleshoot the the same error.

As it is a DNS error, the initial diagnosing is done with the Nslookup command. Verify both forward and reverse lookups are correct for both VCenter and VDP. At this stage (Network Settings) It checks only the DNS of VDP appliance.
Using following names and IPs to explain instead of the actual IP and Hostnames

Vcenter IP : 192.168.0.1
VDP IP : 192.168.0.2
DNS IP : 192.168.0.3

Vcenter FQDN : vcenter.example.com
VDP FQDN : vdp.example.com
DNS FQDN  : dns.example.com

As per the vmware-KB-2036396  it should ping and respond to the nslookup (default A record) from both Vcenter and VDP.

nslookup vdp.example.com 192.168.0.3
nslookup 192.168.0.2 192.168.0.3
nslookup vcenter.example.com 192.168.0.3
nslookup 192.168.0.1 192.168.0.3

If it is not giving the output you may also check the following

Telnet to the DNS server and make sure that the service is accessible in the port 53 (“telnet 192.168.0.3 53” ). This will fail if both DNS server and VDP are in different network zones and not properly configured firewall rules.

In my case all the forward and reverse lookups were working fine and still getting the same error.

At this stage , I Just confirmed the names in “/etc/hosts”

192.168.0.2 vdp.example.com vdp
127.0.0.1 localhost.localdomain localhost

Make sure that your DNS server is listed in /etc/resolv.conf

nameserver 192.168.0.3

Still getting the same DNS error. Now talked to vmware support and they instructed to check the above settings same as listed in the vmware-KB.And their second try was to re implement the older appliances. and we tested with VDP 6.1.1, 6.1, 5.8.1, and 5.8.

Appliance 5.8.X will show some SSL error, and will not open in most browsers without a patch as per Vmware ( known issue )

 Error code: ERR_CONNECTION_CLOSED

Fix script is in this Vmware-KB-2111900

VMware Data Protection web configure still showing the “IP/DNS could not be resolved” message when configuring the Network settings.

Now I run a network packet sniffer ( tcpdump ) in the VDP server. Tcpdump is inbuilt in almost all the linux distributions. VDP is build with SUSE Linux. It is better to work with a SSH client like putty instead of working from a vmware console.
The default root password of VPD appliance is “changeme”. However it will show an authentication error if we try ssh to the vdp.This is because SSH is disabled for root login by default .

How to enable ssh In VDP server

Open file “/etc/ssh/sshd_config” and find the line “PermitRootLogin yes” and uncomment it. now restart the ssh server with

"/etc/init.d/sshd restart"

Again BACK to the packet sniffer TCPdump to debug

Connect SSH to the VDP server and run following command to monitor only the DNS queries.

tcpdump -vvv -s 0 -l -n port 53

Now from another SSH session test a DNS request using Nslookup

nslookup vdp.example.com

Important portion of the response output

q: A? vdp.example.com. 1/0/0 vdp.example.com. A 192.168.0.2

Now run the VDP web configuration and apply Network settings to simulate the DNS error and check the request response in tcpdump
Request is initiated by vdp-configure/services/dns/dolookup web call

Important portion of the response output

q: ANY? vdp.example.com. 0/1/0 ns: example.com. SOA dns.example.com.

Here there is no information about the IP address. Noticed that VDP appliance webconfig is using a “ANY” meta query instead of normal A record check. In my case this is the reason for the DNS error.

Here my DNS server is running on a linux box with “unbound”. We have been using this for long time in my organization for the Internet and Intranet DNS needs. As per my understanding UNBOUND server is a single purpose DNS server. There is no code to support Dynamic DNS updates, or zone transfers, etc. As it is not able to respond to “ANY” query, I have to find a workaround. So I configured a different Linux server with BIND for Just to Answer the DNS requests from VDP Server.

Now the questions come up like, what is “ANY” record in DNS ? why it is used in this appliance ? why my DNS server is not responding for the “ANY” query. ?

“ANY” is a special DNS meta query. Instead of doing a single query like A / NS, “ANY” retrieves all the available records of a domain name.
This is one of the request which can get a biggest DNS reply from a DNS server. Even if it is named ANY It really look like ALL records. It is also known as ‘*’. This can also be used for Zone transfer between DNS servers. Users can easily get the entire DNS zone with one command.
It can also be used for a DNS Amplification DDoS Attack. That is why some of the DNS servers are not responding to “ANY” query.
Basic reason for adding the ANY to DNS had been to assist in debugging and testing, there is no real reason to check the DNS ANY query from an application.

How to query “ANY” or “*” using Nslookup / dig ?

dig ANY google.com @8.8.8.8
nslookup -q=ANY google.com @8.8.8.8

Also bear in mind that, As there is a limit in the UDP packet size, the largest DNS responses need a TCP connection instead of UDP connection to port 53. Make sure that the TCP and UDP for port 53 is opened in the firewalls.

There is no inbuilt option to lock the Whatsapp application. and the application not working with a direct authentication mechanism. your phone number is the username and Whatsapp application itself create a key for the authentication and hardcoded in to the local database. Decrypt/sniff that password is a different topic whcih we will discuss later. Messages can be leaked if the phone can be physically access or stolen. people are asking this feature in whatsapp forums and they are recommending users to use application locking software.

you might already using lock screen with passwords or pattern. apart from that if you want specific password for your whatsapp, you should use any application locker. There are many softwares recently listed in play store specifically targeted on users searching for whatsapp lock. applications like “Lock for WhatsApp”, “WhatsApp Lock”, “Secure Chat – Lock messenger” are examples of that.

Why you need a separate locking software for each chat messenger ? you may also using Skype, wechat, telegram, hike etc. So all you need to do is, just configure a single software to lock all the application. Check google playstore for “application locks”

You can see AppLock listed first. and its is good in functionality. Downlaod Applock from play store

nslookup binbert.com 8.8.8.8

For OpenDNS it is

nslookup binbert.com 208.67.222.222

There are many popular DNS services which we can use. it include Norton DNS, Level3, Verizon etc.

This script will prompt the domain name and set the value to variable. then check the dns status with nslookup command in each public dns servers.
finally output will display in a single window. If you dont know how to create a batch file, Simly copy below code to a text editor and save as filename.bat. Make sure that you are not assign name as “nslookup.bat” It will conflict with nslookup.com command
Looking forward for your feedback

Code :

:: version 1.0
 echo off
 Title Mass DNS testing script by www.binbert.com
 cls
 echo.
 echo.
 set /p domainname=Enter Domain Name :
 cls
 echo.
 for /f "skip=1 tokens=2 delims=: " %%a in ('nslookup %domainname% ^| find /v "Aliases"') do set my_dns_result=%%a
 cls && echo. && echo. && echo Collecting data && echo.
 echo. [####* ]
 for /f "skip=1 tokens=2 delims=: " %%a in ('nslookup %domainname% 8.8.8.8 ^| find /v "Aliases"') do set google_result=%%a
 cls && echo. && echo. && echo Collecting data && echo.
 echo. [#######* ]
 for /f "skip=1 tokens=2 delims=: " %%a in ('nslookup %domainname% 208.67.222.222 ^| find /v "Aliases"') do set OpenDNS_result=%%a
 cls && echo. && echo. && echo Collecting data && echo.
 echo. [##########* ]
 for /f "skip=1 tokens=2 delims=: " %%a in ('nslookup %domainname% 216.146.35.35 ^| find /v "Aliases"') do set DynDNS_result=%%a
 cls && echo. && echo. && echo Collecting data && echo.
 echo. [#############* ]
 for /f "skip=1 tokens=2 delims=: " %%a in ('nslookup %domainname% 198.153.192.50 ^| find /v "Aliases"') do set Norton_DNS_result=%%a
 cls && echo. && echo. && echo Collecting data && echo.
 echo. [################* ]
 for /f "skip=1 tokens=2 delims=: " %%a in ('nslookup %domainname% 8.26.56.26 ^| find /v "Aliases"') do set combo_result=%%a
 cls && echo. && echo. && echo Collecting data && echo.
 echo. [###################* ]
 for /f "skip=1 tokens=2 delims=: " %%a in ('nslookup %domainname% 156.154.70.1 ^| find /v "Aliases"') do set DNS_Advantage_result=%%a
 cls && echo. && echo. && echo Collecting data && echo.
 echo. [######################* ]
 for /f "skip=1 tokens=2 delims=: " %%a in ('nslookup %domainname% 4.2.2.2 ^| find /v "Aliases"') do set Verizon_result=%%a
 cls && echo. && echo. && echo Collecting data && echo.
 echo. [#########################* ]
 for /f "skip=1 tokens=2 delims=: " %%a in ('nslookup %domainname% 209.244.0.3 ^| find /v "Aliases"') do set Level3_result=%%a
 cls && echo. && echo. && echo Collecting data && echo.
 echo. [############################* ]
 for /f "skip=1 tokens=2 delims=: " %%a in ('nslookup %domainname% 81.218.119.11 ^| find /v "Aliases"') do set GreenTeamDNS_result=%%a
 cls && echo. && echo. && echo Collecting data && echo.
 echo. [###############################* ]
 for /f "skip=1 tokens=2 delims=: " %%a in ('nslookup %domainname% 195.46.39.39 ^| find /v "Aliases"') do set SafeDNS_result=%%a
 cls && echo. && echo. && echo Collecting data && echo.
 echo. [##################################* ]
 for /f "skip=1 tokens=2 delims=: " %%a in ('nslookup %domainname% 208.76.50.50 ^| find /v "Aliases"') do set SmartViper_result=%%a
 cls && echo. && echo. && echo Collecting data && echo.
 echo. [#####################################*]
 cls
 echo. && echo.
 echo. Results from various DNS server for Domain %domainname%
 echo.
 echo. Searched for A-Record
 echo. && echo. && echo.
 echo Result from Your DNS Settings : %my_dns_result%
 echo Result from Google DNS : %google_result%
 echo Result from OpenDNS : %OpenDNS_result%
 echo Result from Norton DNS : %Norton_DNS_result%
 echo Result from Combo Secure DNS : %combo_result%
 echo Result from DNS Advantage : %DNS_Advantage_result%
 echo Result from Verizon : %Verizon_result%
 echo Result from Level3 : %Level3_result%
 echo Result from GreenTeam DNS : %GreenTeamDNS_result%
 echo Result from Safe DNS : %SafeDNS_result%
 echo Result from SmartViper DNS : %SmartViper_result%
 echo Result from DynDNS : %DynDNS_result%
 echo. && echo. && echo.
 Pause

After “Year In Rreview” ( https://www.facebook.com/yearinreview ) facebook introduce a new feature called “look back”  As a part of 10th anniversary.  You can go here (https://facebook.com/lookback ) and watch your highlighted moments in facebook.  The video is automatically created based on your top photos and shares.  But many users reported that they can watch the video but still they cannot share this,  “Share your movie” button is missing in this page. Here is the workaround to share the video.

How to share facebook “look back” video

1 ) login to your facebook as usual
2 ) Then go to this link https://m.facebook.com/lookback/share
3 ) There you will get share option. Click share

Message  “Here’s my Facebook movie. Find yours at https://facebook.com/lookback/ #FacebookIs10”.

4 ) Come back to http://facebook.com for normal view.

Credits Mark Zuckerberg

How to Edit Facebook Lookback ?

For some users there is option to Edit the look back video. waiting for the solution to get edit option. I will update as soon as i find something.

How to download Facebook Lookback video ?

1. Open link https://www.facebook.com/lookback
2. Press Ctrl+Shift+J to open the console.
3. Copy the whole code from the following link: http://textuploader.com/14qr and paste into console then press enter.
4. Then. It will gives you the video link for download.
5. Click it and Press Ctrl+S to download and save it.
6. Upload it to Facebook, Youtube or whatever as you want for sharing.

This tutorial is based on Centos 5.6. You can use other versions. DRBD is a mirroring system which replicates all data in a specified partition to another server on a network. The Replication occurs continuously while the applications modify the data in the partition.
Install centos 5.6 in two machines.
Create a partition with same size in both machines; here it is /dev/sda3
Do not mount the partition now.
Run the below command to wipe disk with zeros.

dd if=/dev/zero of= /dev/sdb1 bs=1M count=50

Create a mount point /var/lib/mysql

Set name of the first machine active.drbd.com ip 192.168.29.13
Second machine passive.drbd.com with ip 192.168.29.14
We are going to assign a virtual IP, which is going to be used with heartbeat. The virtual IP we are using here is 192.168.29.50
Set hosts entry on both machines for the two ips.
Enable centos extras repository.
http://mirror.centos.org/centos/5/extras/x86_64/RPMS/
install drbd 8.3 with the the following command
yum install drbd83
DRBD also have a kernel module
yum install kmod-drbd83
restart machine.
Confirm these two are installed and the kernel module is loaded by running the following command.
cat /proc/modules | grep drbd

Edit /etc/drbd.conf

################################################################################
#
# please have a look at the example configuration file in
# /usr/share/doc/drbd83/drbd.conf
#
global {
usage-count no;
}
common {
protocol C;
handlers {
outdate-peer “/usr/lib/heartbeat/drbd-peer-outdater”;
}}

resource r0 {
on active.drbd.com {
device /dev/drbd1;
disk /dev/sda3;
address 192.168.29.13:7789;
meta-disk internal;

}
on passive.drbd.com {
device /dev/drbd1;
disk /dev/sda3;
address 192.168.29.14:7789;
meta-disk internal;
}
disk {
fencing resource-only;
}
}
##########################################################################

The drbd.conf file should be the same in both the machines.

Replace the /etc/drbd.conf in the passive.drbd.com with this file.
Create device metadata. This step must be completed only on initial device creation. It initializes DRBD’s metadata:
drbdadm create-md r0

drbdadm attach r0
drbdadm syncer r0
drbdadm connect r0
drbd status file /proc/drbd
These steps must be done in both the machines.
Run the following command to start the initial synchronization. Run this command only in the active server.
drbdadm — –overwrite-data-of-peer primary r0

check status by cat /proc/drbd

mkfs.ext3 /dev/drbd1

The default directory of mysql is /var/lib/mysql

Mount the /dev/drbd1 to /var/lib/mysql directory in active.drbd.com

Install mysql in active machine and create the database .

Install mysql in passive.drbd.com
Keep the secondary unmounted all the time.
Reload drbd configuration
drbdadm adjust all
Now check the drbd status by running service drbd status. If it is working properly and the disk is properly mounted, create a file in the mounted /var/lib/mysql directory. Then we need to make the passive.drbd.com primary . Run the following command in passive.drbd.com.
drbdadm primary r0
now mount the partition in passive.drbd.com
check /var/lib/mysql and confirm the file you created is there.
Now we finished working with drbd. We are now going to integrate heartbeat with drbd.
Install heartbeat by running “yum install heartbeat”
As we are using dopd-peer-outdater as fence-peer program. If you use that mechanism the dopd heartbeat plug-in program needs to be able to call drbdsetup and drbdmeta with root privileges.
U need to fix this with the following commands.
Chgrp haclient /sbin/drbdsetup
Chmod o-x /sbin/drbdsetup
Chmod u+s /sbin/drbdsetup
Chgrp haclient /sbin/drbdmeta
Chmod o-x /sbin/drbdmeta
Chmod u+s /sbin/drbdmeta
DRBD configuration files are located in /etc/ha.d
There are mainly three configuration files for heartbeat.
The /etc/ha.d/ha.cf is the main configuration file of heartbeat.
/etc/ha.d/haresources contains the list of resources to be managed within the cluster .
The /etc/ha.d/authkeys file contains the security information for the cluster.
Change permission of the authkeys file
Chmod 600 authkeys
The ha.cf file

logfacility local0
keepalive 500ms
deadtime 10
warntime 5
initdead 30
node active.drbd.com
node passive.drbd.com
ucast eth0 192.168.29.13
ucast eth0 192.168.29.14
auto_failback on
respawn hacluster /usr/lib64/heartbeat/dopd
apiauth dopd gid=haclient uid=hacluster
ping 192.168.29.1 // Gateway
respawn hacluster /usr/lib64/heartbeat/ipfail

The haresources file is shown below
192.168.29.50 will be the ip of the active machine. We can point the database to this ip. As this is a virtually managed ip by heartbeat, this ip is assigned to both the machine. active.drbd.com will be the default primary machine. When active.drbd.com fails, the passive.drbd.com becomes the primary machine and 192.168.29.50 will be assigned to this machine and partition will be mounted automatically. Later when active.drbd.com becomes available in the network and all data in passive.drbd.com is replicated to the active.drbd.com, active.drbd.com switches to primary automatically.
active.drbd.com drbddisk::r0 Filesystem::/dev/drbd1::/var/lib/mysql::ext3 mysqld 192.168.29.50
We need to create a soft link of the file mysqld in the folder /etc/ha.d/resource.d/
The mysqld file is located in the installation directory of mysql.
Next is the authkeys file .
auth 1
1 sha1 linuxisfreedom
“linuxisfreedom” is the key we are using here. You can use any combination as key.
Start heartbeat by service heartbeat start.
You can find the log of Heartbeat in /var/log/messages
Restart the machine . Check the mysql is running and partition is mounted in active machine only.
You can check the manual failover by running /usr/lib64/heartbeat/hb_takeover in passive.drbd.com

You can test other conditions also. Try things like shutdown primary machine, remove network cable etc.
Try the below command in passive machine when you are testing.
tail –f /var/log/messages

HP launches first Atom-based Moonshot servers. It is a blade server kind of concept with advantages of cost , power and cooling. Hope you already seen the custom Hyperscale computing designs of google  facebook servers.  Here in HP Moonshot Systems the individual Computers are bring in to a single 4U chassis.   One 4U server is powered with 45 blades. see the image for understanding how the blades designed. when we compare Moonshot servers with the bladesystem design, Moonshot blades loaded from the top. Server have an inbuilt Network switch to interconnect all the blades. chassis have dual powerfully to powerup all 45 blades.

Where this can be used

This concept is useful  where the applications need to handle Big data or distributed computing in the web / cloud environments. web farms  and Apache Hadoop are great ideas to implement with Moonshot

Technical specification

Processor :  Intel Atom Processor S1260, 2.0 GHz
Cache memory : 1 MB
Memory protection :  Advanced ECC (multi-bit error protection)
Memory Ty pe : Unbuffered (UDIMM), ECC @ 1333 MHz (1 SO-DIMM Slot )
Memory  Configuration : 8 GB (1×8 GB)
Network controller : Broadcom ®  5720 Dual-port 1Gb Ethernet Controller
Storage controller  : Marvell® 9125 Storage device Hard Drive
Each server will ship with a SATA HDD or SATA SSD
Maximum internal storage (per HP ProLiant Moonshot Server) :  Quick release SATA 2.5″ – 1 slot

Sample SMS which will filter

IL-Idea:

Dear Customer your data usage: Cost: Rs.0.00, Vol: 12.954MB, Duration: 3.11.50(Hr.Min.Sec), Bal Volume Pk1: 575.57MB, Validity ends on 01.11.2012

I tested two android application to spam control this sms. both application will work without any complicated settings, just install and run

No Spam Sms  | Android

Download from Play Store

Spam Agent – SMS Filter  | Android

Download from Play Store

Spam Agent – SMS Filter | Symbian (Nokia)

Download from www.mobilespamagent.com Direct link

Its also available in OVI store