JMD Infotech: Systems Software

Showing posts with label Systems Software. Show all posts

How To Trace An Email

What is an email header?

Each email you receive comes with headers. The headers contain information about the routing of the email and the originating IP of the email. Not all emails you receive can be traced back to the originating point and depending on how you send emails determines whether or not they can trace the email back to you. The headers don't contain any personal information. At most, you can get the originating IP and the computer name that sent the email. The originating IP can be looked up to determine from where the email was sent. IP address location information DOES NOT contain your street address or phone number. It will most likely determine the city and the ISP the sender used.

How do I get the email header?

Each email program will vary as to how you get to the email options. I'll cover the basics...the rest is up to you.

Outlook

Right click the email while it's in the inbox and choose Message Options. A window will open with the headers in the bottom of the window.

Windows Live Mail

Right click the email while it's in the inbox, choose Properties, then click the Details tab.

GMail

Open the email. In the upper right corner of the email you'll see the word Reply with a little down arrow to the right. Click the down arrow and choose Show Original.

Hotmail

Right click the email in the inbox and choose View Message Source.

Yahoo!

Right click the email in the inbox and choose View Full Headers.

You can see that no matter the email program, the headers are usually just a right click away.

I've got the header, now what?

Usually the first IP listed is where the email originated. There are exceptions to this. You'll have to look at the information logically to deduce the originating IP.

Can any email be traced?

Yes and No. For example, someone who sends an email to your hotmail account shows in the X-Originating IP section of the headers. However, someone who sends you an email from GMail can ONLY be traced back to the GMail servers.

- JMD COMPUTER INDIA

Source: http://www.whatismyip.com/faq/how-to-trace-an-email.asp

Router Support

8:40 PM | Computer Networking , computer tricks , DNS , Domain , Hosting , Internet , IP , JMD Infotech India , Linux , SEO , Software , Systems Software , Web Developing , windows

A lot of users in the What Is My IP Forum will ask us for help with their router. Unless it's one we specifically own, our help will be limited. The links below are to provide users a way to find their users manual on their Routers Manufacturer's site. If you've still got questions, you can ask them in the Router Configuration Forum.

Belkin
Buffalo
D-Link
Linksys
NetGear

- JMD COMPUTER INDIA

Source: http://www.whatismyip.com/faq/router-support.asp

What Is MAC Cloning?

8:38 PM | Computer Networking , computer tricks , DNS , Domain , Hosting , Internet , IP , JMD Infotech India , Linux , SEO , Software , Systems Software , Web Developing , windows

MAC cloning can only be done at your router providing it has those capabilities. Most ISPs assign their IPs based on the MAC address in your equipment. If the MAC address of your router is 00-11-22-33-44-55 and you connect to your ISP, the DHCP server records your MAC and assigns an IP. If you disconnect from the ISP, you lose your IP address. The next time you connect, the DHCP server sees your MAC, looks to see if it has assigned an IP address to you before. If it has and the lease time has not expired, it will most likely give you the same IP address you had before disconnecting. Why clone a MAC address? New MAC address most likely equals new IP. How to clone your MAC and if your router has this feature is dependent on the router itself. You’ll need to find the instructions on the manufacturer’s website. Check out our Router Support page to get started.

- JMD COMPUTER INDIA

Source: http://www.whatismyip.com/faq/what-is-mac-cloning.asp

What is a MAC address?

12:06 AM | Computer Networking , computer tricks , DNS , Domain , Hosting , Internet , IP , JMD Infotech India , Linux , SEO , Software , Systems Software , Web Developing , windows

A MAC address is a physical hardware address assigned to each device that has the capability of connecting to a network. The internet is nothing more than a large network. The MAC address is something that is assigned in the chip on the device and is not something the user can change.

- JMD COMPUTER INDIA

Source:http://www.whatismyip.com/faq/what-is-a-mac-address.asp

UNIX IP Commands

12:02 AM | Computer Information , Computer Networking , computer tricks , DNS , Domain , Hosting , Internet , IP , Linux , SEO , Software , Systems Software , Web Developing , windows

Display Current Config for all NIC's: ifconfig

Display Current Config for dc0: ifconfig dc0

Assign multiple IP's: ifconfig dc0:0 192.168.1.2

Assign second IP: ifconfig dc0:1 192.168.1.3

Disable network card: ifconfig dc0 down

Enable network card: ifconfig dc0 up

Assign IP/Subnet: ifconfig dc0 inet 192.168.1.2 netmask 255.255.255.0

Assign Gateway: route delete default && route add default 192.168.1.1

You MUST be at the ROOT user to make/save any changes. You will need to save your changes in the /etc/rc.conf file. Network cards are referred to as dc0, dc1, dc2, etc based on their position on the PCI bus.

Special thanks to Romanov Sergey Vladimirovich from Moscow for the UNIX command.

- JMD COMPUTER INDIA

Source: http://www.whatismyip.com/faq/unix-ip-commands.asp

Linux IP Commands

12:00 AM | Computer Information , Computer Networking , computer tricks , DNS , Domain , Driver , Hosting , Internet , IP , laptop , Linux , SEO , Software , Systems Software , Web Developing

Display Current Config for all NIC's: ifconfig

Display Current Config for eth0: ifconfig eth0

Assign IP: ifconfig eth0 192.168.1.2

Ping: ping -c 3 192.168.1.1

Assign multiple IP's: ifconfig eth0:0 192.168.1.2

Assign second IP: ifconfig eth0:1 192.168.1.3

Disable network card: ifconfig eth0 down

Enable network card: ifconfig eth0 up

View current routing table: route "or" route -n

View arp cache: arp "or" arp -n

Assign IP/Subnet: ifconfig eth0 192.168.1.2 netmask 255.255.255.0

Assign Default Gateway: route add default gw 192.168.1.1

Trace Route: traceroute www.whatismyip.com

Trace Path: tracepath www.whatismyip.com

DNS Test: host www.whatismyip.com

Advanced DNS Test: dig www.whatismyip.com

Reverse Lookup: host 66.11.119.69

Advanced Reverse Lookup: dig -x 66.11.119.69

You MUST be at the ROOT user to make/save any changes. Linux users, your distribution will determine the location of your network config file which will need to be updated and saved in order for the changes to remain in effect after rebooting. Network cards are referred to as eth0, eth1, eth2, etc based on their position on the PCI bus.

Special thanks to Gergely for the Linux commands!

- JMD COMPUTER INDIA

Source: http://www.whatismyip.com/faq/linux-ip-commands.asp

DOS / Windows IP Commands

11:58 PM | Computer Information , Computer Networking , computer tricks , DNS , Domain , Hosting , Internet , IP , Software , Systems Software , Web Developing , windows

Display Connection Configuration: ipconfig /all

Display DNS Cache Info: ipconfig /displaydns

Clear DNS Cache: ipconfig /flushdns

Release All IP Address Connections: ipconfig /release

Renew All IP Address Connections: ipconfig /renew

Re-Register the DNS connections: ipconfig /registerdns

Change/Modify DHCP Class ID: ipconfig /setclassid

Network Connections: control netconnections

Network Setup Wizard: netsetup.cpl

Test Connectivity: ping www.whatismyip.com

Trace IP address Route: tracert

Displays the TCP/IP protocol sessions: netstat

Display Local Route: route

Display Resolved MAC Addresses: arp

Display Name of Computer Currently on: hostname

Display DHCP Class Information: ipconfig /showclassid

- JMD COMPUTER INDIA

Source: http://www.whatismyip.com/faq/dos-windows-ip-commands.asp

What is Multibooting?

10:00 PM | Computer Information , computer tricks , Linux , Systems Software , windows

Multibooting is the ability to install and use more than one Operating System in the same computer.

Generally most of us use just one operating system in our computers such as Windows or Linux. But there are people who install and use more than one operating systems in their computers. Some of the people who do this are:

Computer students
Computer teachers
Programmers and developers who would like to test, how their application will behave in different operating systems
Testers

Such users who have installed more than one operating systems in their computers will see a menu with a list of operating systems that they have installed. They can choose the operating system with which they want to boot from the list. Likewise they have switch between different OS by rebooting and selecting the OS. This is called multibooting.

How to install more than one Operating Systems in one computer?

1. Disk Partitioning

If your computer has two hard disks and they are not partitioned then you can two different Operating Systems on each of this hard disks. If you have only one hard disk and it is partitioned then you can install different OS on each of these partitions. Each OS needs to have a separate partition.

You can use FDISK to partition the harddisk in windows. This is not an easy tool to use. While partitioning, the data in the harddisk will be lost. Therefore you need to backup the data before partitioning.

If you are not so sure about using this command, there are other more user friendly applications available for partitioning. 'Nortan Partition Magic' is one such tool. You can get this tool, This is not a free tool. 'Ranish partition manager' is a free tool but it is a bit difficult to use.

If you like to use windows and linux in your computer, then install Windows first and partition your hard disk and then install Linux in the other partition.

2. Virtual Machine (VM)

Those who want to use multiple OS in their computers can use Virtual Machines. VM is now very popular. By the use of software, VM creates a Virtual environment for different OS. You have installed many applications in your computer. VM is another application. To switch between one OS to another, run the VM application first and then switch to the other OS. Then the VM will generate a virtual environment for the other OS. The other OS will then think that it is using the computer entirely by itself.

Using the Multibooting method only one OS can be run at a time. The selection is done while booting.

Using VM, more than one OS can run simultaneously. Each OS will run without knowing the existence of the other OS. But this will reduce the computer speed and performance. Some of the popular VM are Microsoft Virtual PC (www.microsoft.com) and VMware Workstation (www.vmware.com)

3. Emulators

Sometimes you may not need the full fledged OS. But you may want to use a specific feature of an OS. For instance you may not want the full 'Linux' OS but you want the base shell of Linux to run linux based applications on your computer.

In Windows, you may want to see the look and feel of 'Linux' and you want to run 'Linux' commands on the windows OS. For this there are emulators available for different OS.

For example, you can use Cygwin which is a free tool to emulate the Unix OS under windows. You can download this tool from (www.cygwin.com).

Source: - http://www.allpctips.com/software/whatis-multibooting.htm

Tutorial to Hide visited websites from others

9:48 PM | Computer Information , computer tricks , Internet , laptop , Software , Systems Software , windows

We search for lots of information on the internet. But it is not necessary that others know about this. Whenever you visit any website this information is captured and stored in your computer in the form of 'cache', 'cookie', 'history', and 'windows registry'. There is a danger due to this. Whoever uses the same computer after you have used can find out which websites you have been visiting. If you have a personal computer that no one else will ever use, then you don't have to worry much about this. But if your home or office computer is shared then you better clear this history. In this tutorial let us see how to completely remove the recently visited websites from your computer.

Cache Folder

Every time you visit a website, every browser has the functionality to store the images, websites, urls etc in your hard disk somewhere in the temporary folders. This is useful to save bandwidth. When you visit the same website again, instead of downloading all the images again, the browser will retrieve them from the temporary folders from your hard disks and therefore increasing the speed and saving internet bandwidth. So when you finish browsing you can clear these temporary folders. This temporary folder is usually referred to as Cache. The exact location of this folder will differ based on the browser you are using. For instance if you use Internet explorer then this cache is located in the 'Temporary Internet Files' folder under your c:\Windows folder.
You can either delete from this folder or you can delete it from your browser. Goto Tools-> Internet Options. Under the General tab click 'Delete Files' button.
History

All the browsers also store the urls of every website you visit. This is used to show the address of the site on the 'Address Bar' when you start typing the first few letters of the websited address, the browser will take from the history and prompt you for the full address. This makes your job easier so that you need not type the full address every time. But if you want to hide the sites you visit then you have to remove this history also. Internet explorer stores this history in a folder called 'History' under c:\Windows folder.

Or you can delete history from your browser. Goto Tools-> Internet OPtions. Select the 'General' tab and click on 'Clear History' button. In the confirmation dialog box select 'OK'. This will clear your history.
Cookies

Whenever you visit websites, some information about you and some information about that website is stored in your computer's hard disk. When you visit the same site again, the information stored in this cookie file will be read to identify you. This is especially useful for sites that can personlize the site for you and displays messages such as 'welcome your_name' etc. But this cookie also stores the name of the site you visit so you should also delete these cookies if you want to hide the sites you visited.

To delete cookies, goto Tools->Internet Options. And click on 'Delete Cookies' button. Or you can choose the security tab and click on 'Custom Level' button to disable or enable cookies.
Registry

Another place in which the websites you visited are stored is the windows registry. It is not advisible to modify registries if you are not sure how to use them. Only those who are confident and willing to take risk should touch the registry. Click on 'Start->Run' and type 'regedit' and press enter. The windows registry will open. Now click on 'Edit->find' and type 'URL History'. In the right hand side you can see a list of website addresses that you visited. You can select them one by one and delete them. programs, viruses and hackers.

Source: - http://www.allpctips.com/internet/hide-history-of-websites-you-visited.htm

Compaq Presario C772TU Notebook PC Driver

11:22 PM | Driver , laptop , Software , Systems Software , windows

Compatible software and drivers

The following software and drivers are compatible with your product and the operating system Microsoft Windows Vista (64-bit)

Driver – Audio

Conexant High-Definition Audio Driver

Released: 2008-09-10

Version: 4.42.0.0 A