Shulou(Shulou.com)06/03 Report--

Gateway

Router: two hosts on different network segments, nat (net adress transfer) source address translation, disguised as an address that can be recognized by the destination address

The ip on the router is the gateway on the same network segment as the customer host.

Modify the network card setting gateway

Experiment

Experiment

Add a network card to rhel7 to make rhel7 act as a router, add a network card: place the cursor over rhel7 in the window bar, right-click, set, network adapter, add network adapter, select bridging mode, after setting up, there will be two network cards

Rhel7 can communicate with two hosts with different network segments at the same time, so use it as a router to communicate between two hosts with different network segments.

So that these two network cards can be routed using the kernel, so turn on the kernel routing parameters

Turn on address camouflage function

Add a gateway (the gateway of the customer host, which has the same router address as the host network segment). After success, it can communicate with the hosts of different network segments. 172.25.254.10 this host first sends its own information to 172.15.254.100, through the routing function of the kernel, pass the data (address camouflage function, disguised as 192.168.1.7) to an address that can communicate with 192.168.1.8

Dns

Address resolution: convert (the ip corresponding to the corresponding address in the file) address to ip

Host for address resolution: dns server

Communication method: ip form

Set up the gateway, which cannot communicate through the domain name, but can be communicated through ip

Edit the local resolution file. The domain name corresponds to ip, which is too cumbersome to communicate through the domain name in the file.

Edit the dns to point to the file so that you can communicate through the domain name without having to write it artificially

Bridge Settin

Function of network bridging: the kernel of the virtual machine needs to be sent to the network card with the help of the real kernel. The virtual machine network and the real network are disconnected and can be shared through the real kernel. Open an interface (bridging interface) so that the virtual machine and the physical machine network card are in the same parallel network environment, that is, the real host can directly control the physical network card through the control bridge interface and make the data go out directly.

How do I open the bridging interface?

Note: some of the notes come from Mr. Li of the Western Open Source, and the experimental pictures are owned by me.

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