jpudasaini

A Network Administrator command  which help diagnosis DNS related issue. However to understand this,  you should better to know how DNS works. How to troubleshoot DNS related issue. 1. NSLOOKUP example display "A Record" (IP Adress) of the domain C:\Users\jpudasaini>nslookup jpudasaini.com.np 8.8.8.8 Server:  google-public-dns-a.google.com Address:  8.8.8.8 Non-authoritative answer: Name:    jpudasaini.com.np Address:  216.239.32.21 A Non-Authoritative Answer is a response from Cache. A DNS server is authoritative for zones actually holds it. The above output shows "A Records" (IP Adress) of the domain " jpudasaini.com.np ". Which is actually query to the public Google DNS. If you don't put DNS after the domain, it will used your default DNS, in my case I have used public DNS. 2. MX Record using -query=mx MX (Mail Exchange) record maps for the specific domain name to verify mail exchaing servers on that domain.

On your outlook express while sending the emails and you get following error. Cannot send the message. Verify the e-mail address in your account properties. The server responded: 550 Access denied - Invalid HELO name (See RFC2821 4.1.1.1) Follow below procedure to solved the issue.  1. Click Tools>Account 2. Select"View or change existing e-mail accounts" and click next 3. Select desire email account and click change 4. Click on "More Settings" at bottom of the page 5. Select on "Outgoing server" tab 6. Check "My outgoing server (SMTP) requires Authentication" 7. Select "use same settings as my incoming email server" 8. Click "Ok" 9. Press Next and Finished 

We all wants our home network protect form adult contain. YouTube also contain full of adult materials. So here I'm going to discuss about protecting our home from adult contain material. For this I'm going to use k9 web protection tool. Lets began the protection. Step 1. Free Download K9 web protection From here Step 2.  Choose "Get K9 Free for your Home" with your email address for free license. Step 3.  Install K9 web protection software. At the end it will ask for reboot, do it. Step 4.  After reboot open the "Blue coat K9 Web protection Admin" Step 5. Click Setup, it will ask for admin password, choose your admin password. (don't forget it, need it for future) Step 6. In my case I choose "Default" setting. This will block YouTube also. You can choose what you desire. These days YouTube also contain full of adult material, if you want to block YouTube leave default setting as is it or want to block social site

How to send email through Telnet. You can use it for troubleshoot purpose when sometime outgoing issue from the mail server. 1. First open the Command prompt. ctrl+r, now type "cmd". before that you have to enable telnet service from control panel>program and feautre>Turn windows features on or off> now choose telnet client 2. Now, connect with telnet command just type telnet mail.yourdomain.com 25 3. From the picture, you already enter into the server now use following command helo mail.yourdomain.com 4. type mail from username, see on screenshots mail from: username@yourdomain.com 5. Type receiver ID here, see screenshot. rcpt to: yourfriend@hotmail.com, yourfriend@yahoo.com 6. To add message just use " data " command and type " subject " command. At the end don't forget to add "." to end the message and press enter. data subject: this is test email hello, This is jpudasai

This tutorial helps you to determine the mail server for any email address. This is helpful to identified SMTP mail sever to use or configure Outlook. In day to day work I need to troubleshoot email ID with mail hosting server, so this syntax is very useful for me, if you don't kown the mail server just use following syntax to identify the mail server mail.domainname.com or smtp.domainname.com, it those doesn't work then you need to follow below steps. (change "domainname" with your desire domain.) 1. Open a DOS Command Prompt 2. Type "nslookup" 3. Your computer's DNS server name and IP address will be displayed. 4. Now just type "set type=mx" - this will force NSLOOKUP to shows Mail eXchange records from the DNS servers. 5. You can try using gmail.com or use your own domain name. 6. you can see below output.

Suddenly I encounter a weird problem with VMware 9 version. I install different OS for my education and testing purposed. Like MAC os, Ubuntu, CentOS, BT, WinXP, Win-server 2003. When I tried to run one of this OS a error message appear. unable to open kernel device "\\.Global\vmx86": The system cannot find the file specified. Did you reboot after installing VMware Workstation? Failed to initialize monitor device. Click ok you can see this window After googling I found one solution in developer forum but thread starter never use that method. So I tried it and here is my finding. Go to the directory of vmware installed  (In my case I run it as Administrator) C:\Program Files (x86)\VMware\VMware Workstation>   ( I've 32-bit apps on 64-bit OS, your may be different) Run this command vnetlib -- uninstall vmx86  reboot Go to the same directory and check net start command - this time it should say "service name  is invalid&quo

In my day to day office work. I need to check actual throughput of the local link, that should be wire or wireless. For that process I use iperf tool which is perfect tool for the purpose. Here I write tutorial how to use that tool. I'm using this tool for window, so download iperf for window and place it in Desktop or as your choice. Now go to that folder using cd [FolderName], in my case I place it on desktop. C:\Users\jpudasaini\Desktop\iperf>dir 03/13/2013  08:07 AM    <DIR>          . 03/13/2013  08:07 AM    <DIR>          .. 08/15/2010  01:54 AM            46,094 cyggcc_s-1.dll 08/15/2010  01:54 AM           791,566 cygstdc++-6.dll 08/31/2010  09:00 AM         2,648,181 cygwin1.dll 06/22/2011  03:56 PM    <DIR>          doc 03/13/2013  07:09 AM         1,268,927 iperf-2.0.5-2-win32.zip 02/02/2011  02:00 PM            95,125 iperf.exe 03/13/2013  08:07 AM               298 test.txt                6 File(s)      4,850,191 bytes      

I encounter a problem installing WinPcap in windows 8 when I try to install GNS3. So I search and found the resolution for that.  Make sure You download WinPcap. Go the folder and right click the WinPcap_x.x.exe file then go the properties, on properties window click on Capabilities tab, now check on "run this program in compatibility mode for:" choose windows 7 from drop down menu. See the picture below. click on red circle to install the WinPcap. While installing WinPcap if error message occurred  " Error: "An error occurred while installing the Microsoft Network Monitor Driver  (NetMon) (0x800F0203). You will be able to use WinPcap on standard network adapters, but not on Dialup connections and VPNs. Please contact  the WinPcap team."   download Microsoft Network Monitor tools, from Microsoft site and install. Now you can easily install the and run the tool.

This command saved my time. Its a life saver sometime. Boot with Windows 7 DVD/USB. When you see the Install Now , Look at the bottom of the page, you can see  REPAIR YOUR COMPUTER , just click it. Windows will try to repair it self, That would be START RECOVERY OPTION. That couldn't fixed it. It would show you other option like SYSTEM IMAGE RECOVERY, just cancel it. Then you can see SYSTEM RECOVERY OPTION, just select COMMAND PROPMT on just enter this command. bootrec.exe /FixMbr >>>This will show you successful Message, you would Please to see that. If that couldn't fixed the problem. There is another command.  bootrec.exe /FixBoot >>> Reboot your PC >> Now you are happy to see your old DESKTOP, Do you ever wounder why hiberfile.sys file exist?  If so then don't be, hiberfile is exist when you hibernate your PC to boot fast. This is a snap shot of your current running apps, and write that all information into your hard disk.