In the server configuration, each peer (a client) will be able to send packets to the network interface with a source IP matching his corresponding list of allowed IPs. For example, when a packet is received by the server from peer gN65BkIK..., after being decrypted and authenticated, if its source IP is 10.10.10.230, then it's allowed onto the interface; otherwise it's dropped.
Samsung Remote Server Client Concepts
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In the server configuration, when the network interface wants to send a packet to a peer (a client), it looks at that packet's destination IP and compares it to each peer's list of allowed IPs to see which peer to send it to. For example, if the network interface is asked to send a packet with a destination IP of 10.10.10.230, it will encrypt it using the public key of peer gN65BkIK..., and then send it to that peer's most recent Internet endpoint.
In the client configuration, its single peer (the server) will be able to send packets to the network interface with any source IP (since 0.0.0.0/0 is a wildcard). For example, when a packet is received from peer HIgo9xNz..., if it decrypts and authenticates correctly, with any source IP, then it's allowed onto the interface; otherwise it's dropped.
In the client configuration, when the network interface wants to send a packet to its single peer (the server), it will encrypt packets for the single peer with any destination IP address (since 0.0.0.0/0 is a wildcard). For example, if the network interface is asked to send a packet with any destination IP, it will encrypt it using the public key of the single peer HIgo9xNz..., and then send it to the single peer's most recent Internet endpoint.
The client configuration contains an initial endpoint of its single peer (the server), so that it knows where to send encrypted data before it has received encrypted data. The server configuration doesn't have any initial endpoints of its peers (the clients). This is because the server discovers the endpoint of its peers by examining from where correctly authenticated data originates. If the server itself changes its own endpoint, and sends data to the clients, the clients will discover the new server endpoint and update the configuration just the same. Both client and server send encrypted data to the most recent IP endpoint for which they authentically decrypted data. Thus, there is full IP roaming on both ends.
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Now, as the cost of hardware (and network bandwidth) continues to fall, there is increasing interest in centralizing computational work on server back-ends, and using thin clients of varying capabilities depending on the workload involved.
A line of hardware clients designed to connect over local and wide-area networks, with a variety of configurations (e.g., both single and dual display connectors). The remote host can be Windows, Linux or Solaris OS, as Oracle ships support for all three operating systems.
The Citrix family of remote-application products works similar to Terminal Services, but supports both clients and application servers across multiple platforms. Citrix also works closely with the Xen hypervisor, so that virtual machines running under Xen (or individual applications running under those machines) can be published across the network.
A thin client (or lean client) is a virtual desktop computing model that runs on the resources stored on a central server instead of a computer's resources. Normally thin clients take the form of low-cost computing devices that heavily rely on a server for computation. The term can also describe software applications that use the client-server model in which the server performs all the processing.
Thin clients work through connecting to a server-based computing environment. The server will normally store data like applications and memory. Essentially, the desktop environment is held on a server. Thin clients are managed server-side, with a virtual desktop infrastructure (VDI). Thin clients and other lean devices rely on a constant network connection to a central server for full computing and don't do much processing on the hardware itself.
The term is derived from the fact that small computers in networks tend to be clients and not servers. The goal is to limit the capabilities of thin clients to only essential applications, so they tend to be purchased and remain "thin" in terms of the client applications they include. Thin clients could be PCs, Chromebooks or mobile devices.
Thin clients can be given to employees across industries for a number of reasons. They can be used to replace computers and to help access virtual desktops or virtualized applications. It is generally more cost-effective to use thin clients compared to a computer where all the processing is done locally. This is because each thin client doesn't need to be as new or powerful, considering most of the processing will be done server-side.
Thin clients could also be used in remote environments, so users don't have to worry about getting their PCs fixed as much. If the endpoint device is downloading most of its data from a server, there are fewer moving parts on the client side to worry about. In addition, organizations that need endpoint devices to be more secure may choose thin clients over other architectures.
An example of a thin client is a set of endpoint devices in a government office, where many people will use the same machine. Because the office data and applications are being accessed through a server and not locally, it is more secure. And because of the processing and computationally heavy tasks being done server-side, the endpoint device itself can be a bit older with less expensive hardware. Applications that may be hard for older computers to run can be pushed to the server, so performance still stays quick. Applications like Microsoft Windows Terminal Service could also be used as a proprietary protocol for remote desktops and applications
Using a cloud computing-based architecture, a server in a data center will take on the processing load of multiple clients. Client hardware and software are kept rather lightweight, as the device only needs to make use of clients for essential applications. This also means the need for client-side setup or administration is reduced. User assets and data recovery tasks are also centralized for better visibility and scalability.
With the client side kept as lightweight as possible, the central server will take on much of the processing load. Because most of the data is being held in the central server, most of the focus in security is placed on securing the central server. Critical IT assets are also centralized in order to better use and allocate resources. Resources the central server will handle include memory and use of processor cores, for example.
Thin clients can work within a shared terminal service, desktop virtualization or within a browser-based approach. In a shared terminal service, all clients share a server-based operating system and applications.
With desktop virtualization, each desktop is a virtual machine that is partitioned form a central server. This way of creating thin clients will have the central server partition resources to the appropriate clients. Even though the operating system and applications are not shared resources in this instance, they are still stored in the central server.
The browser-based approach is different from a normal thin client system in that the client will have functions execute from within a web browser, instead of on a central server. Data processing is done on the thin client. This form focuses on retrieving software and data that is held on a network.
Even though these approaches are different, in general, the goal is to keep client hardware and software as lightweight as possible. Client hardware will generally have low-energy processers, low levels of RAM, HDD space and will offer lower levels of performance compared to a normal computer. A minimum amount of processing power is needed to boot up the device and connect to the server. Thin clients are designed to be networked to a more powerful central server. Even though the client is not as powerful, users will still interact with it as if it were a normal computing device.
Thin client software should also be minimized. Software on the client side should be an operating system, and software that allows the device to connect the central server. Ideally, once the thin client is turned on, the device should receive the IP address and connect to a server using a protocol or another piece of software. The user can then log into the server and access the server's resources.
The central server each thin client connects to must be advanced enough to handle multiple client sessions at once and must be prepared to prevent outages and bottlenecks. The server should be able to connect to each client consistently in order to ensure each client can keep working.
Thin clients can be contrasted with thick clients, which are essentially desktop PCs that can handle all the functionality of a server if required. Thick clients have most resources installed locally, rather than distributed over a network. Thick client devices will use their own hard drives, software applications and other local resources. Most, if not, all essential components are contained in a thick client.
A thin client, on the other hand, is a low-cost network computer that relies heavily on a server for its computational role. The idea of a thin client is to limit the computing capabilities to only essential applications. As opposed to thick clients, thin clients are more easily manageable, easier to protect from security risks and lower on maintenance and licensing costs. 2ff7e9595c
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