.
6.1.3 implementation principle of napt
Because the one-to-one conversion method of basic Nat does not achieve the reuse of public network addresses, it cannot effectively solve the problem of IP address shortage, so it is not commonly used in practical applications. The napt introduced here can implement concurrent address translation, allowing multiple internal addresses to be mapped to the same public
addresses in the two directions are the opposite.
Because the one-to-one conversion method of Basic NAT does not achieve the reuse of public network addresses, it cannot effectively solve the problem of IP address shortage, so it is not commonly used in practical applications. The NAPT introduced here can implement concurrent address translation, allowing multiple internal addresses to be mapped to the same public address, therefore, it can also be c
extranet IP address, many to one.
The NAPT uses a port multiplexing approach. All hosts on the internal network can share a legitimate external IP address to enable access to the Internet, thereby minimizing IP address resources. At the same time, can hide all the hosts inside the network, effectively avoid attacks from the Internet. Therefore, the most application in the network is the port multiplexing method.
Iv. Steps of the experimentEx
external IP address to access the Internet, thus saving IP Address resources to the maximum extent. At the same time, all hosts in the network can be hidden to effectively prevent attacks from the Internet. Therefore, port multiplexing is the most widely used network.
Iv. Experiment steps
Lab Topology
1. R1 is the egress router of the company. It is connected to the ISP router through a serial
Network address port Conversion NAPT is a very familiar way of transformation. NAPT is commonly used in access devices, which can hide small and medium-sized networks behind a legitimate IP address.Unlike dynamic address NAT, NAPT maps An internal connection to a separate IP address in the external network, adding a TCP port number selected by the NAT device to t
Often hear the concept of internal IP and external IP, then what is the meaning of these two concepts.
As we all know, with the proliferation of Internet users, IPv4 's address is becoming more and more inadequate, so how to solve this problem, in order to alleviate the pressure of IPv4 address, people put forward NAT and NAPT solutions, to some extent, to alleviate the IPV4 address is not enough to bring the pressure.
NAT: "Network address tran
Basic settings
> DHCP
Service , click, set as follows:
5
, setting
napt
rules
Click on the
Transfer control
> NAT
settings
> Napt, click on the Napt rule set as follows:
Note: the interface name of the network is configured in step 3, where the WAN port is used as an example of PPP
How do I set up a wireless router? WAN port and LAN port are the key
Most users who have been familiar with broadband routers know that the ports on the broadband routers are divided into WAN ports and LAN ports. A Broadband Router has the following features during work: data streams from the LAN to the WAN are not restricted by default through the router, and da
. For example, if the Cisco router has already added this function, the network administrator only needs to set the NAT Function in the IOS of the router to shield the internal network. For example, the firewall maps the internal address 192.168.1.1 of WEBServer to the external address 202.96.23.11, and the external access address 202.96.23.11 is actually access 192.168.1.1. In addition, small enterprises w
In this tutorial we is going to learn what to navigate programmatically (or imperatively) by using the Router API. We is going to learn how to use the function Navigatebyurl to navigate using a manually constructed string, but we are AL So-going to learn-trigger route navigation by using the Navigate API method, which takes an array or arguments and A Parameters object.We is going to learn how to do both absolute and relative route navigation using th
I. vro settings and computer settings
1) vro settings I, see.
2) vro settings II, see:
Change the WAN port address, LAN port address, and DHCP address range.
Key points:The WAN port set by the router is a dynamic IP AddressVroObtain the IP address, change its own IP address and DHCP to another CIDR block so that it is not in the same CIDR block as the first vro.
2. Router connection
Connect any LNA port
3G network card is widely used, but mobile phones, laptops and other terminals need to share the network, use TL-MR11U to convert 3G signal to Wi-Fi signal, to achieve Internet sharing. Insert your 3G Modem (3G Modem) and set the wireless network to meet your needs. As shown in the following figure:3G application topologySelect the setting method you need to refer:At home, you use the broadband account and password. In the company, you use static IP addresses (bound to MAC addresses) and dynamic
Today this problem for a long time, finally find out why, we search this problem in Baidu basically only one answer click Open link
In fact, it is not to say that people answer the wrong, but more vague, see screenshots:
In fact, the answer is this, when we use React-router, React-router's idea is to let us
Remember: Be sure to establish an association in this root route, or you will always report the Magic Error
Naturally, we can think of somet
address.
NAT functions are usually integrated into routers, firewalls, ISDN routers, or individual NAT devices. For example, if this function has been added to the Alpha router port ing, the network administrator only needs to set the NAT Function in the router's IOS to shield the internal network. For example, the firewall maps the internal address 192.168.1.1 of the WEB Server to the external address 202.96.23.11, and the external access address 20
Probe into IP address and DHCP setting of router in multi-router environmentProbe into IP address and DHCP setting of router in multi-router environmentHere the LAN port management IP address of the router is called the gateway address of the
There are many things worth learning about in the configuration of a Cisco Wireless Router. Here we mainly introduce how to use a vro to set up a PC to share the Internet, including knowledge about DHCP, security, TCP/IP network protocols, and so on.
As a product designed specifically for broadband Internet sharing, a Broadband Router has the advantages of simple and convenient Internet sharing, high securi
Wireless Router introduction and wired Router Access: 1: Check whether the wired router line is set correctly. The line from the modem should be connected to the WAN interface of the router, that is, the main interface. If it is connected to another 1, 2 ....... The computer is connected to the LAN interface of other n
public IP address, but this translation only happens when the local IP address is sent to access a specific IP address and the specific service Web/FTP.4. NAPT Rule: the default factory settings of the system. This setting translates the reserved IP address and port of the local network into a single IP address of the public network and the port specified in the NAT global configuration. This method provides the most secure protection for the LAN.5.
connected to the LAN is larger, the less bandwidth resources available for each workstation, the slower the surfing speed, as the prices of Switch Equipment and router equipment keep falling, Medium-and Small-scale LAN networks begin to abandon network devices such as hubs.
In recent years, many organizations have begun to use vswitches as network devices to connect to each workstation, and use a star topology to build a LAN network. On the surface,
With the rapid development of wireless network, wireless router is an indispensable part of our life. Many friends have a cable router at home, want to connect to a wireless router, so as to achieve WiFi access, it's convenient, fast, well received by friends like. I am using the jhr-n835r wireless router, then the fol
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