1. TCP agent:
WANO device acts as the server compared with the client and acts the client compared with the server by “intercepting” and “proxing” TCP ACK message. This way, the client thinks remote server is located in the same LAN with it, so this can accelerate the communication with WANO device.

 

2. HTP:
This is a patented technology of SANGFOR, and is a brand new transmission protocol combining the reliability of TCP and high efficiency of UDP.

 

3. Flow-cache:
A large volume of duplicated data is transmitted in the network, so ultimate objective of flow-cache algorithm is to replace the transmitted data with a tag to reduce the traffic of data transmission and improve the network throughput.
Flow-cache algorithm is to search the packet in the form of the feature matching. When one packet arrives, several feature values are abstracted from this packet with specific strategy, and they are compared with original feature library. If similar feature values are found, corresponding data will be abstracted and compared, and if consistent, the data will be encoded, and the tag is sent to the opposite end, otherwise, feature values of this packet will be stored in the feature library for later use.

 

4. GZIP:
GZIP compresses static files such as HTML, JavaScript, CSS, etc. and dynamic files such as asp, aspx, php, jsp, etc. with universal compression algorithm. The most remarkable benefit of the compression is reducing the data volume transmitted over the network and accelerating the access of the client browser.

 

5. LZO:
LZO (Lempel-Ziv-Oberhumer) is a data compression algorithm that is focused on decompression speed. It provides the following advantages: simple and quick decompression; requiring no additional memory for decompression; quick compression; requiring 64KB memory for the compression; allowing the user to adjust the balance between compression quality and compression speed, without affecting the speed of decompression; including compression levels for generating pre-compressed data which achieve a quite competitive compression ratio; there is also a compression level which needs only 8KB for compression; algorithm is thread safe; and algorithm is lossless.

LZO compresses a block of data into matches (a sliding dictionary) and runs of non-matching literals. LZO takes care about long matches and long literal runs so that it produces good results on highly redundant data and deals acceptably with non-compressible data. When dealing with uncompressible data, LZO expands the input block by a maximum of 16 bytes per 1024 bytes input.

 

6. Web Push:
Web push is an acceleration technology for HTTP applications. With intelligent method, it transmits the webpage object to be transmitted to the branch device first, and when the client can obtain this object directly from the branch office, so as to accelerate the access to HTTP webpage.

 

7. Dynamic addressing:
In case of dynamic IP at both ends of VPN tunnel, it is impossible for traditional method to build VPN - both ends of VPN can not obtain IP address of opposite side, and can not perform the tunnel negotiation. At this time, WANO devices can discover the IP of opposite side to build VPN tunnel.

 

8. Multiplexing:
Multiplexing VPN tunnel which provides reusable bandwidth and line backup is established between both ends of the tunnel. If VPN device establishing the tunnel has two Internet lines, the tunnel can negotiate to generate 2*2=4 VPN tunnels, and this process can be dispatched as per specific algorithm to ensure VPN reliability and stability.

 

9. Tunnel self-healing:
When VPN tunnel is broken for specific reason (such as the network failure), the system can discover the break automatically, and after the network connection is restored, the system performs automatic re-negotiation to establish new VPN tunnel to ensure the tunnel is connected in time.