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    Alpha Computer Group’s Cisco consultant team excels at setting up Cisco routers, PIX or ASA firewalls, concentrators, and other networking appliances for businesses of all sizes. We are industry certified consultants and technicians which provides our clients the advantage of exclusive benefits and knowledge of various technology, software, & products. We have formed additional strategic relationships to other industry leaders and partners to complement our offerings to directly support your needs. Network Security is as much about your bottom line as it is about deterring threats.
A security plan that addresses your critical business concerns – customer confidence, data integrity, increased productivity, and cost savings – will give you the business advantage by thoroughly targeting security vulnerabilities at their source: people and their processes.

    A Virtual Private Network enables users access to secured network of remote a organization. It can be contrasted with an expensive system of owned or leased lines that can only be used by one organization. The goal of a VPN is to provide the organization with the same capabilities, but at a much lower cost. We at Alpha Computers can assist businesses to use the shared public infrastructure (Public WAN) while maintaining privacy through security procedures and tunneling protocols. These protocols work by encrypting and decrypting the data sent through a tunnel. The data is sent only when they are properly encrypted so as to avoid any kind of security issues. For additional level of security, the experts at Alpha Computer Group combs through the encryption not only at the data side but also to the originating and receiving network addresses. Our expert consultants will work with you to find your business a best-fit VPN Provider.

    Alpha Computer Group VPN Solutions:

    Enables centralized and/or outsourced IT services

    Saves on expenses related to network breakdown or poor network performance

    Help in saving administrative costs of managing incongruent networks

    Enables cost-saving and productivity enhancing capabilities such as Enterprise VoIP

    Services of VPN Solutions at Alpha Computers:

    VPN’s are typically utilized by organizations that are operating out of multiple office locations that require a secure, flexible and cost effective means for their employees to communicate and share information across a central computer network and to do it in a safe and secure manner. This is the reason we at Alpha Computer Group have formed a proper and channelized network with a strong foundation for a number of business critical applications including:


    VoIP phone service
    Remote application
    Centralized merchant transactions
    Access (Citrix OR 2X)
    Remote user access
    Software applications
    File transfer/sharing
    Video delivery
    Secure access to internal
    Compliance requirements
    Central data storage & backup
    Outsourced network management

    A virtual private network (VPN) extends a private network across a public network, such as the Internet. It enables a computer to send and receive data across shared or public networks as if it is directly connected to the private network, while benefiting from the functionality, security and management policies of the private network. A VPN is created by establishing a virtual point-to-point connection through the use of dedicated connections, virtual tunneling protocols, or traffic encryption. A virtual private network connection across the Internet is similar to a wide area network (WAN) link between sites. From a user perspective, the extended network resources are accessed in the same way as resources available within the private network. VPNs allow employees to securely access their company’s intranet while traveling outside the office, even on they’re mobile phones. Similarly, VPNs securely connect geographically disparate offices of an organization, creating one cohesive network. VPN technology is also used by Internet users to connect to proxy servers for the purpose of protecting personal identity and location.

    We help our clients with various VPN support like:


    Secure VPN network
    Information Collection
    Vendor Research
    Implementation Planning

    Early data networks allowed VPN-style remote connectivity through dial-up modems or through leased line connections utilizing Frame Relay and Asynchronous Transfer Mode (ATM) virtual circuits, provisioned through a network owned and operated by telecommunication carriers. These networks are not considered true VPNs because they passively secure the data being transmitted by the creation of logical data streams. They have given way to VPNs based on IP and IP/Multiprotocol Label Switching (MPLS) Networks, due to significant cost-reductions and increased bandwidth provided by new technologies such as Digital Subscriber Line (DSL)and fiber-optic networks.

    VPNs can be either remote-access (connecting an individual computer to a network) or site-to-site (connecting two networks together). In a corporate setting, remote-access VPNs allow employees to access their company’s intranet from home or while traveling outside the office, and site-to-site VPNs allow employees in geographically disparate offices to share one cohesive virtual network. A VPN can also be used to interconnect two similar networks over a dissimilar middle network; for example, two IPv6 networks over an IPv4 network.

    VPN systems may be classified by:

    the protocols used to tunnel the traffic.
    the tunnel’s termination point location, e.g., on the customer edge or network-provider edge.
    whether they offer site-to-site or remote-access connectivity.
    the levels of security provided.
    the OSI layer they present to the connecting network, such as Layer 2 circuits or Layer 3 network connectivity.

    Some Different Types of VPN Technology:


    Opportunistic encryption
    Split tunneling
    Mediated VPN
    Tinc (protocol)
    DMVPN (Dynamic Multipoint VPN)
    Virtual Private LAN Service over MPLS
    Ethernet Virtual Private LAN (EVP-LAN or E-LAN) defined by MEF
    SoftEther VPN, another open-source VPN program which supports SSL-VPN, IPsec, L2TP, OpenVPN, EtherIP and SSTP protocols listed in the Security mechanisms section

    VPN Security mechanisms

    To prevent disclosure of private information, VPNs typically allow only authenticated remote access and make use of encryption techniques.

    VPNs provide security by the use of tunneling protocols and through security procedures such as encryption. The VPN security model provides:

    confidentiality such that even if the network traffic is sniffed at the packet level (see network sniffer and Deep packet inspection), an attacker would only see encrypted data.

    sender authentication to prevent unauthorized users from accessing the VPN.

    message integrity to detect any instances of tampering with transmitted messages

    Secure VPN protocols include the following:

    Internet Protocol Security (IPsec) as initially developed by the Internet Engineering Task Force (IETF) for IPv6, which was required in all standards-compliant implementations of IPv6 before RFC 6434 made it only a recommendation. This standards-based security protocol is also widely used with IPv4 and the Layer 2 Tunneling Protocol. Its design meets most security goals: authentication, integrity, and confidentiality. IPsec uses encryption, encapsulating an IP packet inside an IPsec packet. De-encapsulation happens at the end of the tunnel, where the original IP packet is decrypted and forwarded to its intended destination.

    Transport Layer Security (SSL/TLS) can tunnel an entire network’s traffic (as it does in the OpenVPN project and SoftEther VPN project) or secure an individual connection. A number of vendors provide remote-access VPN capabilities through SSL. An SSL VPN can connect from locations where IPsec runs into trouble with Network Address Translation and firewall rules.

    Datagram Transport Layer Security (DTLS) – used in Cisco AnyConnect VPN and in OpenConnect VPN to solve the issues SSL/TLS has with tunneling over UDP.

    Microsoft Point-to-Point Encryption (MPPE) works with the Point-to-Point Tunneling Protocol and in several compatible implementations on other platforms.

    Microsoft Secure Socket Tunneling Protocol (SSTP) tunnels Point-to-Point Protocol (PPP) or Layer 2 Tunneling Protocol traffic through an SSL 3.0 channel. (SSTP was introduced in Windows Server 2008 and in Windows Vista Service Pack 1.)

    Multi Path Virtual Private Network (MPVPN). Ragula Systems Development Company owns the registered trademark “MPVPN”.

    Secure Shell (SSH) VPN – OpenSSH offers VPN tunneling (distinct from port forwarding) to secure remote connections to a network or to inter-network links. OpenSSH server provides a limited number of concurrent tunnels. The VPN feature itself does not support personal authentication.


    Tunnel endpoints must be authenticated before secure VPN tunnels can be established. User-created remote-access VPNs may use passwords, biometrics, two-factor authentication or other cryptographic methods. Network-to-network tunnels often use passwords or digital certificates. They permanently store the key to allow the tunnel to establish automatically, without intervention from the user.



    Provider-provisioned VPN building-blocks
    Tunneling protocols
    Point-to-point network topology
    Layer 2 L2
    layer 3 L3
    Multiprotocol label switching (MPLS)
    Customer Devices
    Customer Edge Devices
    Provider Edge Devices
    Provider Device
    PPVPN services

    OSI Layer 2 services

    Virtual Lan (VLan)
    Virtual Private LAN Service (VPLS)
    Local Area Network (LAN)
    WIDE Area Network (WAN)
    Pseudo Wire (PW)
    Ethernet over IP Tunneling
    SoftEther VPN
    IP-only LAN-like service (IPLS)

    OSI Layer 3 PPVPN architectures


    Virtual router PPVPN
    Unencrypted tunnels

    Trusted delivery networks

    Multi-Protocol Label Switching (MPLS)
    Layer 2 Tunneling Protocol (L2TP)
    Cisco’s Layer 2 Forwarding (L2F)

    Trusted VPN Manufacturers


    Cisco Networks
    Juniper Networks

    If you need any VPN router or firewall assistance call Alpha Computer Group today @ (877) 608 – 8647

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    Alpha Computer Group
    220A Franklin Avenue, Franklin Square, New York, 11010
    Phone: 1-877-608-8647 |

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