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What is the difference between public and private ip addresses

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Hi Sravi, I posted this just now on another post but here it is in case you need it.

Private IP addresses
are used either to hide systems from the public Internet or to provide an additional range of addresses to organizations that do not have sufficient public IP addresses to distribute on their network. Organizations can use these numbers to assign internal IP addresses without having to worry about an IP address conflict or having to obtain a new block of IP addresses.
If you connect to the Internet as a home user with a residential router, you will typically benefit from this arrangement. Although you may be paying for only one IP address through your Internet service provider (ISP), you can have unlimited devices connected to the Internet.
For example lets say you live in an apartment complex with only one mailbox. all the apartments have numbers but no matter what all the incoming and outgoing traffic goes to that one mailbox.

I hope this helps.

Posted on Nov 13, 2008

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Stellyx
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SOURCE: what is the difference between public & private addresses

Private IP addresses are used either to hide systems from the public Internet or to provide an additional range of addresses to organizations that do not have sufficient public IP addresses to distribute on their network. Organizations can use these numbers to assign internal IP addresses without having to worry about an IP address conflict or having to obtain a new block of IP addresses.
If you connect to the Internet as a home user with a residential router, you will typically benefit from this arrangement. Although you may be paying for only one IP address through your Internet service provider (ISP), you can have unlimited devices connected to the Internet.
For example lets say you live in an apartment complex with only one mailbox. all the apartments have numbers but no matter what all the incoming and outgoing traffic goes to that one mailbox.

I hope this helps.

Posted on Nov 13, 2008

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Ip location


no. An IP address refers to an address that is attached to your network card (or your router). In most cases you will have what is considered a "Private" address (there is a range of addresses reserved for people to use in their private networks so that they don't get confused for things on the internet). So your computer will have a "private" address if you are behind a firewall, router, or internet service provider. You may be looking for your "public" address which would not allow someone to get to your computer from the internet, unless you had "port forwarding" set up in your router. Public addresses usually do not stick to your cable modem or dsl modem, and may change over time. If you need to figure out what your current Public IP address is you will want to go to google and type "what's my ip address" in the search, and it will show you (as well as some links to other web sites that will tell you what your IP address is). If you need to find your private IP address so that other computers on your private network can communicate with you, open the command prompt and type "ipconfg /all" and hit enter. This will give you a list of different adapters that you have on your computer, and what the IP Address is for each (you may have wireless, hard wired, even vpn adapters). The email address that is transmitted in the headers of your email is the public IP address of your mail server (or googles, or yahoos, or whatever your mail provider is).
Hope this helps.

Feb 04, 2014 | Operating Systems

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VPN in Microsoft Server 2003


The full form of VPN is Virtual Private Network. VPN gives extremely secure connections between private networks linked through the Internet. It allows remote computers to act as though they were on the same secure, local network. Allows you to be at home and access your company's computers in the same way as if you were sitting at work.

Almost impossible for someone to tap or interfere with data in the VPN tunnel. If you have VPN client software on a laptop, you can connect to your company from anywhere in the world. VPN goes between a computer and a network (client-to-server), or a LAN and a network using two routers (server-to-server). Each end of the connection is a VPN "endpoint", the connection between them is a "VPN tunnel".

When one end is a client, it means that computer is running VPN client software. You can use a virtual private network (VPN) to connect components to one network by using another network. VPN do this by "tunneling" through the Internet or another public network. With a VPN, connections across the public network can transfer data by using the routing infrastructure of the Internet, but to the user, the data seems to travel over a dedicated private link.

A VPN gives you the benefit of a dial-up connection to a dial-up server, plus the flexibility of an Internet connection. Using an Internet connection you can connect to resources all over the world. If you have a high-speed Internet connection at your computer and at your office, you can communicate with your office at full Internet speed. This is much faster than any dial-up connection that uses an analog modem.

VPNs use authenticated links to make sure that only authorized users can connect to your network, and they use encryption to make sure that others cannot intercept and cannot use data over the Internet. A Tunneling Protocol is a technology that helps make the transfer of information over the Internet more secure from one computer to another.

VPN technology also permits a corporation to connect to its branch offices or to other companies over a public network, such as the Internet, while helping to maintain secure communications. The VPN connection across the Internet logically operates as a dedicated wide area network (WAN) link.

VPN in Windows 2003 Server: You need a high speed Internet connection to configure and run VPN server. Two individual lan card must be present in a single system where you want to configure a VPN Server. The lan cards should ping each other. Also need a User which's Dial in allow access should be enable. Microsoft 2003 server two tunnelling protocols for a secure VPN connection, one is PPTP (Point-to-Point Tunnelling Protocol) which Provides data encryption using Microsoft Point-to-Point Encryption. The other is L2TP (Layer Two Tunnelling Protocol) which Provides data encryption, authentication, and integrity using IPSec.

Steps to create VPN Server in 2003 Server: At first I go to Start and point to Administrative Tools, then click Routing and Remote Access. Then I click the server icon that matches the local server name in the left panel of the console. If the Routing and Remote Access service was previously turn on, you may want to reconfigure the server.

To reconfigure the server Right-click the server object, and then click Disable Routing and Remote Access. Click yes to continue when you are prompted with an informational message. Then Right-click the server icon and then click configure and Enable Routing and Remote Access to start the Routing and Remote Access Server Setup Wizard. After that click Remote access (dial-up or VPN) to turn on remote computers to dial in or connect to this network through the Internet. Then I have Click to select VPN. In the VPN Connection window I click the network interface (Lan) which is connected to the Internet and go the IP Address Assignment window, then I click Automatically because there was present a DHCP server in network. However, if DHCP is not available, you must specify a range of static addresses.

If you use from a specified range of addresses, open the Address Range Assignment dialog box and Type the first IP address in the range of addresses that you want to use in the Start IP address box. Type the last IP address in the range in the End IP address box. Windows calculates the number of addresses automatically. After that I have accept the default setting of No, use Routing and Remote Access to authenticate connection request and finally Click Finish to turn on the Routing and Remote Access service and to configure the server as a Remote Access server.
For the remote access server to forward traffic properly inside your network, you must configure it as a router with either static routes or routing protocols, so that all of the locations in the intranet are reachable from the remote access server. It also need for security purpose.<SPAN style="LINE-HEIGHT: 115%; FONT-FAMILY: 'Verdana','sans-serif

on Mar 22, 2011 | Microsoft Windows Server 2003 Enterprise...

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Http//192. 168.0. 101 :8080


NetName: PRIVATE-ADDRESS-CBLK-RFC1918-IANA-RESERVED
NetHandle: NET-192-168-0-0-1
Parent: NET192 (NET-192-0-0-0-0)
NetType: IANA Special Use
OriginAS:
Organization: Internet Assigned Numbers Authority (IANA)
RegDate: 1994-03-15
Updated: 2013-08-30
Comment: These addresses are in use by many millions of independently operated networks, which might be as small as a single computer connected to a home gateway, and are automatically configured in hundreds of millions of devices. They are only intended for use within a private context and traffic that needs to cross the Internet will need to use a different, unique address.
Comment:
Comment: These addresses can be used by anyone without any need to coordinate with IANA or an Internet registry. The traffic from these addresses does not come from ICANN or IANA. We are not the source of activity you may see on logs or in e-mail records. Please refer to http://www.iana.org/abuse/answers
Comment:
Comment: These addresses were assigned by the IETF, the organization that develops Internet protocols, in the Best Current Practice document, RFC 1918 which can be found at:
Comment: http://datatracker.ietf.org/doc/rfc1918
Ref: https://whois.arin.net/rest/net/NET-192-168-0-0-1


OrgName: Internet Assigned Numbers Authority
OrgId: IANA
Address: 12025 Waterfront Drive
Address: Suite 300
City: Los Angeles
StateProv: CA
PostalCode: 90292
Country: US
RegDate:
Updated: 2012-08-31
Ref: https://whois.arin.net/rest/org/IANA


OrgAbuseHandle: IANA-IP-ARIN
OrgAbuseName: ICANN
OrgAbusePhone: +1-310-301-5820
OrgAbuseEmail: abuse@iana.org
OrgAbuseRef: https://whois.arin.net/rest/poc/IANA-IP-ARIN

OrgTechHandle: IANA-IP-ARIN
OrgTechName: ICANN
OrgTechPhone: +1-310-301-5820
OrgTechEmail: abuse@iana.org
OrgTechRef: https://whois.arin.net/rest/poc/IANA-IP-ARIN

Dec 06, 2013 | Operating Systems

1 Answer

I cant get to internet


Make sure you have an IP address.
Click the Start menu button on the Windows taskbar. Click 'Run...' on this menu. Type 'cmd' in the text box that appears. A command prompt window launches on the desktop. In this command window, type 'ipconfig /all'. Details are shown for each of the computer's network adapters. Computers installed with VPN software or emulation software will possess one or more virtual adapters. The 'IP Address' field states the current IP address for that network adapter.
You should have a private IP # like 192.168.1.###. If you don't, reboot your modem or network router.

Mar 02, 2011 | Operating Systems

3 Answers

How can i make my ip address not shown


It is not possible to hide your IP address. Your external IP address is needed to allow traffic to the internet to get to and from you.
Within your local network, again the IP is necessary for traffic to get to and from you.
There is a lot more to it than that, but thats the basics.

Jan 23, 2011 | Operating Systems

1 Answer

I have problem setting up my wireless network and redirecting my wireless client to my local webpages before they can access to internet.   see this diagram below :...


you need to replace your modem with a router that is capable of running Network Address Translation. You are trying to route private IP's (192,168.x.x) over the public IP (internet) network.

Jan 31, 2010 | Microsoft Windows 2000 Professional for PC

1 Answer

DNS Name resolution Between private & Public network.


You do not need to configure ISP's PTR records. Instead define their DNS addresses as forwarders in the properties of DNS server under forwarders tab and flush DNS cache.

Mar 24, 2009 | Microsoft Operating Systems

1 Answer

What is the difference between public & private addresses


Private IP addresses are used either to hide systems from the public Internet or to provide an additional range of addresses to organizations that do not have sufficient public IP addresses to distribute on their network. Organizations can use these numbers to assign internal IP addresses without having to worry about an IP address conflict or having to obtain a new block of IP addresses.
If you connect to the Internet as a home user with a residential router, you will typically benefit from this arrangement. Although you may be paying for only one IP address through your Internet service provider (ISP), you can have unlimited devices connected to the Internet.
For example lets say you live in an apartment complex with only one mailbox. all the apartments have numbers but no matter what all the incoming and outgoing traffic goes to that one mailbox.

I hope this helps.

Nov 13, 2008 | Microsoft Windows Server Standard 2003 for...

2 Answers

Linux server


Please refer to Linux Administrator guide. The process is not writable in short space. Pls add more dependencies like hardware etc

Jun 05, 2008 | Operating Systems

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