i need the basic theory and configuration of vpn (virtual private network)?
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It create a secure channel so that the other end of th server knows how it is transmission is sometbody it can trust rather than somebody. just PGP key works\n\nthat what it does, but in data text i have no clue.\n\nwe have to use to get remoting to your school.
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if you have no public IP adresses you can make connectin between computer with VPN and u need VPN server
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Try this website, it should be helpful:\n\nhttp://www.ralphb.net/IPSubnet/
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With a virtual private network, you can connect network components through another network, such as the Internet. You can make your Windows Server 2003-based computer a remote-access server so that other users can connect to it by using VPN, and then they can log on to the network and access shared resources. VPNs do this by "tunneling" through the Internet or through another public network in a manner that provides the same security and features as a private network. Data is sent across the public network by using its routing infrastructure, but to the user, it appears as if the data is sent over a dedicated private link.
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Once you VPN in you can have people use your windows shared drives just like they would. You can use your computer name for the link or you IP address of the VPN connections. They can connect like so:\n&#92;&#92;computername&#92;sharename\nor\n&#92;&#92;xxx.xxx.xxx.xxx&#92;sharename\n\nVPN is using the lower layers of the OSI model so to the windows OS on your machine and the distant end machine the fact you are on VPN doesn't matter unless they do some weird stuff with your VPN connections
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site-to-site VPN is definately the way to go, and if you know your stuff, not that hard to set up.  And it gives you scalability, which is always a good thing.\n\nVPN in general has two parts.  There is the 'well protected' internal network and a less trustworthy external network.\n\nThe internal network is your Intranet.  The external network is usually the internet.\n\nA firewall usually divides the internal and external networks.\n\nFor your setup, there would be 3 firewalls, one at each site.  They would all be configured as part of the same VPN. \n\nhere's an example.  Say your internal 'secure' network are islands in the ocean.  the water is the internet. boats are packets/traffic.  A leased line is like building a bridge between the islands.  It's still visible to other boats and is expensive to make (distance fees).\n\nA VPN is like a submarine, undetectable by any boat or other submarine.  Plus, it's easy to add more and more submarines to your 'fleet'.\n\nSo basically, a VPN establishes an authenticated connection over the internt.  Only the firewalls will be able to de-encrypt the information because they're all 'in the know'.
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www.protocols.com is a good site for this kind of info. They are a little light on what happens to the ppp packet in pppoe, but the rest is there.
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For remote desktop you need to have ports forwarded on your router and have xp pro installed on the computer you want to connect to.\n\nIf you use a program called Hamachi, and UltraVNC you can connect to them remotely and securely.\n\nHamachi will establish a vpn connection between the two computers, secure and safe.  One click setup is the best part, that and free.\n\nUltraVNC will allow you to gain remote control of the computer.  \n\nIn combination you will need no ports forwarded and it will be secure.
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Hi Voltron !!!\n\nI found a good article that best suits your needs.  It is a PDF doc "Understanding BitTorrent: An Experimental Perspective" - Technical Report. >> http://hal.inria.fr/docs/00/04/31/40/PDF/bt_experiments_techRepINRIA-00000156_VERSION3_9NOVEMBER2005.pdf\n\n>>> Naveen Kumar
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You need a router that can act as a VPN 'endpoint.' Your router doesn't do that. See the link below for a list of Linksys routers that can be endpoints (and other related information).\n\nHowever, yif you are running Windows XP you should be able to have one PC connect to the company VPN and have all the other use that connection. They would connect through the PC that is running the VPN. Use Internet Connection Sharing to do this. See the second link below. \n\nSource(s):\nhttp://linksys.custhelp.com/cgi-bin/link...\n\nhttp://support.microsoft.com/kb/314066/e...
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UPgrade to XP Pro.\n\nOr here is a freeware VPN server you can use:\n\nhttp://freeware.filehungry.com/english/product/windows_software/network_&_internet/server_tools/ipig_secure_access_vpn_server
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Look here:\nhttp://www.vcn.com/knowledgebase/article.php?id=422\nGood Luck!
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The problem is that on DSL, you do not get a public IP address on your computer. Your router gets one and then your it gives your computer a private IP address. This is called NAT (Network Address Translation). \n\nIn order to use a VPN on a DSL connection, you need to either route a public IP to your computer, which will probably require you to purchase one from your ISP and will require them to help you set it up, or you will need to set up some port forwarding in the router to forward the ports that the VPN program communicates on.\n\nRight now, when you connect to a remote computer, it sees that traffic as coming from the IP address of your router, since your computer IP is private. When it tries to send information back, the router says "Hey! I don't know what this is!" and drops the packets. Port forwarding tells the packets which local IP address they should go to and having a public IP on your computer makes that step unnecessary.\n\nYou will definitely need to call your ISP on this, but I hope my explaination helps to clarify.
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To make a secure LAN u have to install a firewall in each system and configure it such to enable the essential required services like accesing Internet, yahoo messenger, msn etc. and acces to other systems.\n\nThe gateway should be configured to configured for acess to internet and all the other services should be blocked and all the other activites should be logged.
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Launch the VPN client.  Click the entry for the connection.  Click modify.  In the connection properties, click the Transport tab.  Click the Allow Local LAN Access tickbox.  Click Save.\n\nThe next time that you connect, you should have LAN access as well as VPN access.  This assumes that the admin of the endpoint (PIX or concentrator) allows this.  Some do not, for security reasons.  In that case, you'll need to contact the admin and ask if they'll change the settings to allow split tunnelling.\n\nThe risk with split tunnelling is that if someone should hack into your system they will now have access to the network at the distant end of the tunnel.  For obvious reasons, some admins don't want to take that risk.
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You can use VPN, Virtual Private Network, to make a secure and unfiltered gateway/path from your pc to a VPN server outside Iran, and than you can surf free. You don't have to worry about you connection being monitored, all the other side will see is just encrypted traffic that they can't encode and filter. The decoding happens only at your computer, not at the ISP's server.\n\nAnother solution is SSH.\n\n\n At https://www.relakks.com/?cid=gb they offer such a service, but you have to pay to get a VPN account.
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Try these:\n\nhttp://www.sockets.com/a_e.htm\nhttp://zoo.cs.yale.edu/classes/cs433/lecture/network_programming.ppt