Method and computer-readable storage medium for improving address translation availability using redundant connections
A technology of address translation and redundant connection, applied in the field of methods and computer-readable storage media, can solve problems such as the failure of a user to create a new connection and affect the normal operation of the user's business, and achieve the effect of improving usability
Active Publication Date: 2021-12-31
NAT COMP NETWORK & INFORMATION SECURITY MANAGEMENT CENT
View PDF6 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
If the egress IP address is currently unavailable, the user's new connection will fail at this time. At this time, even if there is an available IP address in the system, the user needs to initiate a new new connection request, which will affect the normal operation of the user's business.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0037] The current NAT technology does not consider the situation that the system holds a large number of public network egress IP addresses and is unreliable. In this case, when users access the external network, the success rate of new connections cannot be guaranteed. The present invention designs a redundant connection address translation method. When a user initiates a new session connection, the address translation system simultaneously establishes multiple address translation mappings for the session, and these mappings use multiple different IP addresses to form multiple connection instances. Translate a data packet into multiple data packets and send them to the Internet at the same time. When the other party's response packet arrives, choose the fastest connection to complete the subsequent communication, and abandon the rest of the session connection. Using this redundant connection method, in the case of unreliable egress IP addresses, the success rate of new conn...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a method and a computer-readable storage medium for improving the availability of address translation by using redundant connections. The method includes: receiving an uplink data packet, querying a connection tracking table, and establishing a downlink mapping of the connection according to a network session if there is no connection Quantity, select the corresponding number of public network IPs from the public network IP cache, use the public network IP to translate the source address of the uplink packet; save the public network IP and its corresponding downlink mapping, and receive the first one returned by the network session When the downlink data packet is used, query the downlink mapping corresponding to the downlink data packet, determine the downlink mapping as the official downlink mapping of the network session, and determine the corresponding public network IP as the official egress IP of the network session; all uplink packets of the network session Both use the official egress IP for source address sub-translation, only process downlink data packets that match the official downlink mapping, and discard other redundantly mapped downlink data packets; save the uplink and downlink mapping information in the connection tracking table.
Description
technical field [0001] The invention relates to the communication field, in particular to a method and a computer-readable storage medium for improving address translation availability by using redundant connections. Background technique [0002] NAT technology is a technology that appears when IPv4 addresses are increasingly exhausted. It is mainly used to realize the function of internal network accessing external network, and was released as an RFC document in 1994. NAT provides a mechanism for mapping IP addresses from addressing domain P to addressing domain Q. The addressing domain P is usually called a private IP address domain, which is only allowed to be used by the internal network, and the addressing domain Q is a public IP address domain that can be routed on the Internet. [0003] Currently, there are three types of network address translation that are most widely used: static NAT, dynamic NAT, and network address port translation NAPT. In Static NAT (Static N...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): H04L29/12
Inventor 黄道超沈时军张鸿刘欣然张树壮王凯峰
Owner NAT COMP NETWORK & INFORMATION SECURITY MANAGEMENT CENT