The virtual private network old many VPN protocols, PacketiX VPN provides a full layer 2 (Ethernet) take-off for VPN data transfer. In other words, with old layer 3 VPN solutions, encapsulated IP packets flowed through the tunnel, but with PacketiX VPN, these are Ethernet packets in place of.
Since VPN came to wider use around 1998, variouse VPN protocols have started to become popular, among them:
* PPTP (GRE)
* L2TP / IPSec
* vtun
* OpenVPN
* Port transmission by SSH
Although, older version of VPN solutions have limitations as Mentioned under, which makes them Tough to use under various Situation.
Difficulties to pass network gateway devices:
Internet we can use from company LANs and small localy at home networks is normaly managed by a gateway device, be it a small hardware router or a Linux server, which serves as firewall, proxy server and router with IP masquerading (NAT). While such a gateway provides necessary functions for the management and security of the network, it can be a barrier for older VPN solutions.
Since old VPN protocols do not ship received Protocol packets, they are ofttimes obstructed by firewalls and routers which don't know how to hold specific protocols equivalent GRE or IPSec. If the IP is not decent masqueraded by the router, VPN computer and computer are unable to ground a unification. Thusly, experienced VPNs compel either bespoken devices, or primary firewall and router settings, which affirm time to set up, may not be feasible in every design and effort lessen mesh guarantee. If the router cannot palm the specific rule hired by the VPN or the VPN rule cannot grip masqueraded IPs, a global IP is required for both consumer and server.
In all types satuation, PacketiX VPN is able to instaled a connection out of the box and without any reconfigurations, special hardware or global IPs. This saves money and reduces administration effort.
Network protocols other than TCP/IP can't be transferred:
Acording to rule and regulation VPN protocols can only Simulation a network up to OSI layer 3, the network layer (IP), unlike PacketiX VPN, which takes the technology one step further by emulating Layer 2, the data link layer (Ethernet).
Although, previously a dedicated line was necessary to transfer legacy network protocols such as IPX/SPX and NetBEUI, which are still required by some devices, over a VPN. PacketiX VPN makes it possible to transfer them over the Internet with a software VPN solution.
Tuesday, June 30, 2009
Monday, June 29, 2009
Advantages of an extranet-based VPN
The Intranet virtual private network provide secure internal users access to branch office networks;and also extra net vertual private network provide secure another user they access to selected shared resources. For example, extranet virtual private network can be used to share parts inventory and purchase orders with suppliers. They can be used to supply product information and pricing to customers. They can be used to make collaborative project files accessible to business partners, consultants, and others with a need to know.
Without an extranet, our company might have doubt to run susceptive internal and partner databases on the same server. With an extranet, we can Apply Fine access permissions to share partner data without fear internal data on the same server.
Without an extranet, our company may be install a private access link to support a colleague project. With an extranet, we can use existing network resources and the Internet to share project data, although hampering eavesdropping or updation in transit.
If we Without an extranet, our company may be wait days or weeks for parts to be ordered and shipped. With an extranet, our suppliers can remotely monitor Schedule levels and automatically ship replacement parts when already define minimums are reached.
These are just a few of the many ways in which company can benefit from an extranet VPN. In general, the big the company, the more complex the company's business processes and relationships with other office, creating more happening to heave an extranet VPN's shared infrastructure.
Source: http://searchenterprisewan.techtarget.com/tip/0,289483,sid200_gci1349295,00.html
Without an extranet, our company might have doubt to run susceptive internal and partner databases on the same server. With an extranet, we can Apply Fine access permissions to share partner data without fear internal data on the same server.
Without an extranet, our company may be install a private access link to support a colleague project. With an extranet, we can use existing network resources and the Internet to share project data, although hampering eavesdropping or updation in transit.
If we Without an extranet, our company may be wait days or weeks for parts to be ordered and shipped. With an extranet, our suppliers can remotely monitor Schedule levels and automatically ship replacement parts when already define minimums are reached.
These are just a few of the many ways in which company can benefit from an extranet VPN. In general, the big the company, the more complex the company's business processes and relationships with other office, creating more happening to heave an extranet VPN's shared infrastructure.
Source: http://searchenterprisewan.techtarget.com/tip/0,289483,sid200_gci1349295,00.html
Friday, June 26, 2009
VPN server Authentication
The Vertual private network server we can be configured to use either Windows or (RADIUS) as an authentication provider. If Windows is selected as the authentication provider, the user credentials sent by users trying VPN connections are authenticated using typical Windows authenticity instrument, and the connection try is authorized using the VPN client’s user account properties and local remote access policies.
If Remote Authentication Dial-In User Service is selected and configuration the Reality provider on the VPN server, user credentials and parameters of the connection request are sent as Remote Authentication Dial-In User Service request messages to a Remote Authentication Dial-In User Service server.
The Remote Authentication Dial-In User Service server accept a user-connection request from the VPN server and authenticates and authorizes the connection attempt. In addition to a yes or no response to an authentication request, Remote Authentication Dial-In User Service can report the VPN server of other applicable connection criteria for this user although maximum session time, static IP address assignment etc.
The Virtual private network server we can be configured to use any one Windows or Remote Authentication Dial-In User Service as an administrator. If Windows is selected as the administrator, the administrator information deposit on the VPN server for later analysis. Logging options can be specified from the properties of the Local File or SQL Server objects in the Remote Access Logging folder in the Routing and Remote Access snap-in. If RADIUS is selected, RADIUS accounting messages are sent to the RADIUS server for accumulation and later analysis.
Mainly RADIUS server's we can be configured to place authentication request records into an modify file. lot of third parties have written billing and audit packages that read RADIUS accounting records and built various useful reports.
The Virtual private network server we can be managed using industry-standard network management protocols. The computer work as the VPN server can go in a Simple Network Management Protocol society as an agent if the Windows Server 2003 SNMP service is installed. The VPN server records management information in many object identify oneself with of the Internet Management Information Base II, which is installed with the Windows Server 2003 SNMP service.
Authentication Protocols:
PAP
Password Authentication Protocol is a clear-text authentication scheme. PAP provides no protection against replay attacks or remote client impersonation once the user's password is compromised.
SPAP
The Shiva Password Authentication Protocol (SPAP) is a reversible encryption mechanism employed by Shiva Corporation. Currently, this form of authentication is more secure than plain text .
CHAP
Challenge Handshake Authentication Protocol (CHAP) is an encrypted authentication mechanism that prevents transmission of the actual password on the connection. The remote client must use the MD5 one-way hashing algorithm to return the user name and a hash of the challenge, session ID, and the client’s password. The user name is sent as plain text.
MS-CHAP
Microsoft Challenge Handshake Authentication Protocol (MS-CHAP) is an encrypted authentication mechanism very similar to CHAP. MS-CHAP also provides additional error codes, including a password-expired code, and additional encrypted client-server messages that permit users to change their passwords during the authentication process. In MS-CHAP, both the client and the NAS independently generate a common initial encryption key for subsequent data encryption by MPPE.
MS-CHAP v2
MS-CHAP version 2 (MS-CHAP v2) is an updated encrypted authentication mechanism that provides stronger security for the exchange of user name and password credentials and determination of encryption keys. With MS-CHAP v2, the NAS sends a challenge to the client that consists of a session identifier and an arbitrary challenge string. The NAS checks the response from the client and sends back a response containing an indication of the success or failure of the connection attempt and an authenticated response based on the sent challenge string, the peer challenge string, the encrypted response of the client, and the user's password. The remote access client verifies the authentication response and, if correct, uses the connection. If the authentication response is not correct, the remote access client terminates the connection.
Source: http://technet.microsoft.com/en-us/library/cc779919(WS.10).aspx#w2k3tr_vpn_how_xokw
If Remote Authentication Dial-In User Service is selected and configuration the Reality provider on the VPN server, user credentials and parameters of the connection request are sent as Remote Authentication Dial-In User Service request messages to a Remote Authentication Dial-In User Service server.
The Remote Authentication Dial-In User Service server accept a user-connection request from the VPN server and authenticates and authorizes the connection attempt. In addition to a yes or no response to an authentication request, Remote Authentication Dial-In User Service can report the VPN server of other applicable connection criteria for this user although maximum session time, static IP address assignment etc.
The Virtual private network server we can be configured to use any one Windows or Remote Authentication Dial-In User Service as an administrator. If Windows is selected as the administrator, the administrator information deposit on the VPN server for later analysis. Logging options can be specified from the properties of the Local File or SQL Server objects in the Remote Access Logging folder in the Routing and Remote Access snap-in. If RADIUS is selected, RADIUS accounting messages are sent to the RADIUS server for accumulation and later analysis.
Mainly RADIUS server's we can be configured to place authentication request records into an modify file. lot of third parties have written billing and audit packages that read RADIUS accounting records and built various useful reports.
The Virtual private network server we can be managed using industry-standard network management protocols. The computer work as the VPN server can go in a Simple Network Management Protocol society as an agent if the Windows Server 2003 SNMP service is installed. The VPN server records management information in many object identify oneself with of the Internet Management Information Base II, which is installed with the Windows Server 2003 SNMP service.
Authentication Protocols:
PAP
Password Authentication Protocol is a clear-text authentication scheme. PAP provides no protection against replay attacks or remote client impersonation once the user's password is compromised.
SPAP
The Shiva Password Authentication Protocol (SPAP) is a reversible encryption mechanism employed by Shiva Corporation. Currently, this form of authentication is more secure than plain text .
CHAP
Challenge Handshake Authentication Protocol (CHAP) is an encrypted authentication mechanism that prevents transmission of the actual password on the connection. The remote client must use the MD5 one-way hashing algorithm to return the user name and a hash of the challenge, session ID, and the client’s password. The user name is sent as plain text.
MS-CHAP
Microsoft Challenge Handshake Authentication Protocol (MS-CHAP) is an encrypted authentication mechanism very similar to CHAP. MS-CHAP also provides additional error codes, including a password-expired code, and additional encrypted client-server messages that permit users to change their passwords during the authentication process. In MS-CHAP, both the client and the NAS independently generate a common initial encryption key for subsequent data encryption by MPPE.
MS-CHAP v2
MS-CHAP version 2 (MS-CHAP v2) is an updated encrypted authentication mechanism that provides stronger security for the exchange of user name and password credentials and determination of encryption keys. With MS-CHAP v2, the NAS sends a challenge to the client that consists of a session identifier and an arbitrary challenge string. The NAS checks the response from the client and sends back a response containing an indication of the success or failure of the connection attempt and an authenticated response based on the sent challenge string, the peer challenge string, the encrypted response of the client, and the user's password. The remote access client verifies the authentication response and, if correct, uses the connection. If the authentication response is not correct, the remote access client terminates the connection.
Source: http://technet.microsoft.com/en-us/library/cc779919(WS.10).aspx#w2k3tr_vpn_how_xokw
Thursday, June 25, 2009
How Virtual Private Networks Work
The world has been changed a lot in the last lot of old year's. in place of simply proceeding with local or localy thinking, various businesses now have to think about Universal markets and logistics. and lot of companies have facilities broadness out across the country or around the world level, and there is one thing that all of them need. A path to maintain quickly, secure and reliable communications wherever their offices are.
Until and unless a great deal recently, this has purpose the use of leased lines to maintain a wide area network . Leased lines, with from ISDN (integrated services digital network, 128 Kbps) to OC3 (Optical Carrier-3, 155 Mbps) fiber, provided a company with a way to expand its private network Out of its quickly geographic area. A WAN had declared benefits over a public network like the Internet when it came to reliability, performance and security. But maintaining a WAN, particularly when using leased lines, can become quite expensive and often rises in cost as the distance between the offices increases.
As the highlight of the Internet in public, businesses turned to it as a means of extending their self networks. First came intranets, which are password-protected sites designed for use only by company employees. Now, many companies are creating their self virtual private network to adapt the needs of remote employees and long distance offices.
The vpn's Mostly, a VPN is a private network that mostly uses a public network mostly on the internet to connect remote sites or users together. in place of using a Loyal, real-world connection such as leased line, a VPN uses "virtual" connections routed through the Internet from the company's private network to the remote site or user's. In this article, we will gain a fundamental understanding of VPNs, and learn about basic VPN components, technologies, tunneling and security.
Source: http://computer.howstuffworks.com/vpn.htm
Until and unless a great deal recently, this has purpose the use of leased lines to maintain a wide area network . Leased lines, with from ISDN (integrated services digital network, 128 Kbps) to OC3 (Optical Carrier-3, 155 Mbps) fiber, provided a company with a way to expand its private network Out of its quickly geographic area. A WAN had declared benefits over a public network like the Internet when it came to reliability, performance and security. But maintaining a WAN, particularly when using leased lines, can become quite expensive and often rises in cost as the distance between the offices increases.
As the highlight of the Internet in public, businesses turned to it as a means of extending their self networks. First came intranets, which are password-protected sites designed for use only by company employees. Now, many companies are creating their self virtual private network to adapt the needs of remote employees and long distance offices.
The vpn's Mostly, a VPN is a private network that mostly uses a public network mostly on the internet to connect remote sites or users together. in place of using a Loyal, real-world connection such as leased line, a VPN uses "virtual" connections routed through the Internet from the company's private network to the remote site or user's. In this article, we will gain a fundamental understanding of VPNs, and learn about basic VPN components, technologies, tunneling and security.
Source: http://computer.howstuffworks.com/vpn.htm
Wednesday, June 24, 2009
What Are the Key VPN Security Technologies
Virtual private networks are mostly think to have very high security for data communications. secure VPN provide both network authentication and encryption. Secure VPN are most commonly implemented using IPsec or SSL. because ipsec is provide very high power full security. ipsec encrypt data in algorithm . when user communicate source to destination.
IPsec has been the traditional choice for implementing VPN security on corporate networks. because unauthorized person can't enter if we are configured ipsec service. Enterprise-class network appliances from companies like Cisco and Juniper implement the essential VPN server functions in hardware. Corresponding VPN client software is then used to log on to the network. IPsec operates at the Network layer.
Virtual private networks SSL are an Optional to IPsec that reliable on a Web browser in place of tradition of VPN clients to log on to the private network. By utilizing the SSL network protocols built into standard Web browsers and Web servers, SSL VPNs are idea to be cheaper to set up and maintain than IPsec VPNs. Furthermore, SSL operates at a higher level than IPsec, giving administrators more options to control access to network resources. However, configuring SSL VPNs to interface with resources not normally accessed from a Web browser can be difficult.
Some organizations use an IPsec and some time ssl VPN to protect a Wi-Fi local area network. In reality, Wi-Fi security protocols like WPA2 and WPA-AES are As according to the line to support the necessary authentication and encryption without the need for any VPN support.
Source: http://compnetworking.about.com/od/vpn/f/vpn-security.htm
IPsec has been the traditional choice for implementing VPN security on corporate networks. because unauthorized person can't enter if we are configured ipsec service. Enterprise-class network appliances from companies like Cisco and Juniper implement the essential VPN server functions in hardware. Corresponding VPN client software is then used to log on to the network. IPsec operates at the Network layer.
Virtual private networks SSL are an Optional to IPsec that reliable on a Web browser in place of tradition of VPN clients to log on to the private network. By utilizing the SSL network protocols built into standard Web browsers and Web servers, SSL VPNs are idea to be cheaper to set up and maintain than IPsec VPNs. Furthermore, SSL operates at a higher level than IPsec, giving administrators more options to control access to network resources. However, configuring SSL VPNs to interface with resources not normally accessed from a Web browser can be difficult.
Some organizations use an IPsec and some time ssl VPN to protect a Wi-Fi local area network. In reality, Wi-Fi security protocols like WPA2 and WPA-AES are As according to the line to support the necessary authentication and encryption without the need for any VPN support.
Source: http://compnetworking.about.com/od/vpn/f/vpn-security.htm
Tuesday, June 23, 2009
VPN Authentication Secure Remote Access with eToken
Virtual Private Networks have been changed the path people do business. Employees and business partners can now access secret business resources through the internet any time, any where. because when we connect our network another location through vpn that time some protocol and services work. encrypt our data in another code. hacker can't connect our network and read our data.
But how can organizations be confirm that the users gaining access are real who they claim to be. VPNs identify and confirm privacy by providing a private tunnel through the Internet for remote access to the network. For full security, our VPN must be improved with a reliable user authentication mechanism, securing the end points of the VPN.
Virtual Private Networks User name and password authentication it is not only enough this method is slight and highly highly-strung to hacking, cracking, key loggers, and other attacks. It only takes one compromised password for our organization to lose control over who gains network access. Strong user authentication with a VPN provides true secure remote access for today's world.
1. Strong user VPN authentication using varied methods, including certificates and one-time passwords
2. Secure access from any platform, including unparalleled support for certificate-based access on Windows, Linux, and Mac OS platforms
3. Rapid and easy deployment with Aladdin's Token Management System (TMS): a single system managing the entire solution.
The e Token VPN authentication solution provide us the mind free that users gaining access to the network are authorized to do so.
eToken operates seamlessly with all leading VPN products
Source: http://www.aladdin.com/etoken/solutions/secure-vpn-access.aspx
But how can organizations be confirm that the users gaining access are real who they claim to be. VPNs identify and confirm privacy by providing a private tunnel through the Internet for remote access to the network. For full security, our VPN must be improved with a reliable user authentication mechanism, securing the end points of the VPN.
Virtual Private Networks User name and password authentication it is not only enough this method is slight and highly highly-strung to hacking, cracking, key loggers, and other attacks. It only takes one compromised password for our organization to lose control over who gains network access. Strong user authentication with a VPN provides true secure remote access for today's world.
1. Strong user VPN authentication using varied methods, including certificates and one-time passwords
2. Secure access from any platform, including unparalleled support for certificate-based access on Windows, Linux, and Mac OS platforms
3. Rapid and easy deployment with Aladdin's Token Management System (TMS): a single system managing the entire solution.
The e Token VPN authentication solution provide us the mind free that users gaining access to the network are authorized to do so.
eToken operates seamlessly with all leading VPN products
Source: http://www.aladdin.com/etoken/solutions/secure-vpn-access.aspx
Monday, June 22, 2009
VPN performance is an increasingly important issue
Nowaday's Vertul private network security and diffrence, with performance a lower prevalence and rightly so. Vertul private network is mostly set up with security as one of the primary target, and in many cases, VPNs to be able to interoperate between different vendors, so diffrence is also a key factor. although, performance is becoming more important as VPNs become more prevalent corporate networks.
If our VPN seems slow, or we just want to know how skilful it really is, we have a number of options for improving its performance. Let's look at some of the steps involve.
Mostly generaly, there are two types of VPNs remote client VPNs and site-to-site VPNs. A remote client is Mostly a single PC that uses VPN software to connect to the his domain network on demand, while a site-to-site VPN is Mostly use permanent connection between two sites using dedicated networking equipment. A remote client VPN typically supports telecommuters, while the site-to-site various usually connects office networks.
The Vertul private network built-in Remote Access Services. On the client side, we are running a Windows XP Professional workstation over a 1-Mbps DSL connection. This connection uses Point-to-Point Tunnelling Protocol (PPTP) to connect to the central server.
The Vertul private network While more mostly support than Layer 2 Tunnelling Protocol, PPTP is giving way to L2TP as the tunneling protocol of choice because of L2TP's allready increased security features. although, establishing an L2TP VPN is more complex than setting up a PPTP connection. PPTP-based VPNs may also operate some faster because there is less processing involved in encrypting and encapsulating the packets. Under PPTP, the point-to-point protocol (PPP) payload packet is encapsulated inside a generic routing encapsulation packet, which is then encapsulated inside an IP packet to which the data link header is attached. The packet is then sent across the tunnel.
The topology of our VPN can also have a important efect on its performance and can very widely between the remote devices. If we aresupporting a site-to-site VPN that connects two different remote offices, it's likely that both ends use straight-out equipment configured for a permanent VPN tunnel. If our VPN performance seems slow, we may need to increase the size of the tunnel by adding bandwidth at both ends. we might also be able to change configuration options to increase performance.
Source: http://news.zdnet.co.uk/hardware/0,1000000091,2132230,00.htm
If our VPN seems slow, or we just want to know how skilful it really is, we have a number of options for improving its performance. Let's look at some of the steps involve.
Mostly generaly, there are two types of VPNs remote client VPNs and site-to-site VPNs. A remote client is Mostly a single PC that uses VPN software to connect to the his domain network on demand, while a site-to-site VPN is Mostly use permanent connection between two sites using dedicated networking equipment. A remote client VPN typically supports telecommuters, while the site-to-site various usually connects office networks.
The Vertul private network built-in Remote Access Services. On the client side, we are running a Windows XP Professional workstation over a 1-Mbps DSL connection. This connection uses Point-to-Point Tunnelling Protocol (PPTP) to connect to the central server.
The Vertul private network While more mostly support than Layer 2 Tunnelling Protocol, PPTP is giving way to L2TP as the tunneling protocol of choice because of L2TP's allready increased security features. although, establishing an L2TP VPN is more complex than setting up a PPTP connection. PPTP-based VPNs may also operate some faster because there is less processing involved in encrypting and encapsulating the packets. Under PPTP, the point-to-point protocol (PPP) payload packet is encapsulated inside a generic routing encapsulation packet, which is then encapsulated inside an IP packet to which the data link header is attached. The packet is then sent across the tunnel.
The topology of our VPN can also have a important efect on its performance and can very widely between the remote devices. If we aresupporting a site-to-site VPN that connects two different remote offices, it's likely that both ends use straight-out equipment configured for a permanent VPN tunnel. If our VPN performance seems slow, we may need to increase the size of the tunnel by adding bandwidth at both ends. we might also be able to change configuration options to increase performance.
Source: http://news.zdnet.co.uk/hardware/0,1000000091,2132230,00.htm
Subscribe to:
Posts (Atom)
