What should I do if the server cannot be accessed remotely? What is the reason why the server cannot be remoted?
Next, follow the author to analyze the specific reasons and corresponding solutions
1. Network problems
1. Local network problem
Solution: Check whether the local network is normal and access to the external network is smooth. You can check the routing map. You need to restart the router or contact the local network operator.
2. Server network problem
Solution: Use the routing map to determine where the line is losing packets, and contact the server provider to switch the line.
2. Server problems
Server bandwidth is full, server crashes, black screen or blue screen
Solution: Restart the server, check the error log, check the cause of the problem, and check the hard disk and server system. Check the logs and check the data to confirm the problem
causes and how to resolve them.
3. Port problem
1. Port error
Find the correct port or replace the remote port
2. The port is swept
Change the port, and ban the sweeping IP from accessing the server in the firewall
PS: Check whether the port can communicate normally, you can use the command tcping ip port to confirm, if the port is unreachable, check whether the remote port policy of the firewall has set the current
Add the remote port to the policy. If the firewall policy is normal, check the server login log to see if there is any malicious login information, that is, scan the port.
Under certain circumstances, try not to use the default port 3389 or 35012 for the remote port, and change it to a random five-digit number with a higher safety factor
Fourth, the firewall problem
1. The IP is blocked by the computer room or the operator
Solution: Wait for unblocking.
2. The remote port is not added to the firewall policy
Many people may not understand this very well. Let me explain it here: if the port does not allow everyone to connect in the firewall policy, then this port cannot be accessed.
Similarly, if the remote port is not added to the firewall policy, the server cannot be accessed.
Solution: Generally, the server port of the server obtained at the beginning will take the initiative to help set it up. Remember to add the firewall policy to the changed port after that.
If you can’t operate it, you can contact the server provider for help.
3. The number of connections on the remote computer has been exceeded.
5. Security software issues
blocked by security software
Solution: Check whether the cloud lock and security dog security software have added the local IP of the computer to the server whitelist, if not, add the local IP of the computer to the whitelist
just ok