How to achieve mutual access between different network segments in the LAN?

1.Control Panel User Accounts Turn on a guest account.

2.Then go to the Control Panel, Management Tools, Local Security Policy, Local Policy, User Rights Assignment, Confirm that there is a guest or everyone in the computer accessed from the network, and refuse to access the computer from the network to remove the guest

3.User Rights Assignment (right): "Deny access to this computer from the network" attribute do not leave anything, OK, exit; Add "everyone,administrator" to the "Access this computer from the network" property, OK, Exit.

That's it. 4.Security Options Network Access: (1) Shared and Security Mode for Local Accounts:

Guest Only Local Users Guest Authentication (2) Disabled for SAM Accounts and Shared Anonymous Enumerations, Disabled (3) Accounts: Local Accounts with Blank Passwords are Only Allowed to Log in to the Console, Disabled (4) Accounts: Enable Guest Accounts.

5.Right-click on "My Computer" "Properties" "Computer Name", and see if your LAN workgroup name appears in this tab, such as "work", etc. Then click the Network ID button to start the Network Identity Wizard

Click Next, select This machine is part of a business network, use it to connect to other working computers; Click Next, select Company uses a network without a domain; Click the Next button, then enter the team name for your local area network, such as Work, click the Next button again, and finally click the Finish button to complete the setup.

6.My Computer Tools Folder Options Look for the tick before "Use Simple File Sharing (Recommended)";

7.Right-click on the computer to manage services and application services in a bunch of lists to find "server" and key the property to automatically enabled.

8.Start Settings Control Panel Firewall Exceptions Tick "File & Printer Sharing"! Of course, you can also turn off the firewall.

See if the sharing is not turned on? Generally, some systems turn off sharing by default for security.

Static routing is set to enable the pinging of different network segments of the first-level router and the second-level router, and the L2 router must support the routing mode to achieve this function.

How your PC's gateway is configured.

Can R2 and R3 routers support pure route mode (non-NAT), and if so, then just specify the static routes on both sides on R2 and R3!

If R2-3 does not support pure routing mode and the network scale is not large, the two routers should be switched to the LAN port interconnection

If the R2 and R3 routers support multiple IP addresses and have multiple LAN ports, then configure two IP segments for the LAN port, one of which is used as a route for R2 and R3 intranet interoperability (the LAN ports of the two routers can be directly connected with IP, if your route is not used by enterprises, this cannot be realized).

The above method is to make the whole network interoperable! If the above methods are difficult to implement, then please cancel the following router, when the switch is used, do different network divisions, just do it on your Layer 3 switch, if you are worried about the allocation of IP addresses, you can use 2003 to build DHCP, or hang a small router under each network segment, and turn on DHCP (the WAN of the small router is not used).

If you just want to be able to access "servers" between LANs, it's as simple as publishing the server address and port on R2-R3, which is called port mapping!

The reason why you can't access each other at the moment is that the data from R2 and R3 routers to the WAN port has been converted through NAT, so the place you can directly access is the WAN port address of R2 and R3, and the address below the LAN is inaccessible, you need to access some protocols and servers, and you must do the purpose NAT conversion, that is, you can only actively access the data from LAN to WAN!

The same LAN and the same workgroup cannot access each other because the other party's computer does not have the guest permission enabled, and the guest permission can be accessed by opening the guest permission, and the method of opening is as follows:

1. Open the control panel.

2. Click on User Account.

5. Click Activate in the pop-up message.

6. Then you can see that the guest user has been successfully enabled.

Right-click "My Computer", select "Manage" from the pop-up menu, open the "Computer Management" window, and select the user you are logged in to in "Local Users and Groups" - "Users". Then right-click on the user name, select "Properties" in the pop-up menu, open the user's properties dialog box, add administrator permissions to the user in the "Affiliation" option, and try again after confirmation. Sometimes you may need to restart your computer.

Open "Internet Neighbors" and click on "Set up your home or small office network" on the left - Next - Next - Select "This computer connects to the Internet through a gateway in a residential area or another computer on the network" - Next - Enter any computer description and name - Both computers must enter the same "Workgroup Name" - Check "Enable file and printer sharing" - Next - Next - Check "Complete the wizard." I don't need to run the wizard on another computer. "—Next step – done.

Just restart your computer again.

After restarting, you can open Neighbors again, click on "View Workgroup Computers" on the left, and you will be able to see the other computers, so that the LAN is also set up.