Destination host unreachable General Solution

Symptoms:

Applications that access the Internet are basically normal, but the command line uses the ping command, regardless of the address, returns the destination host unreachable.

 

Analysis:

Enter the commandARP-You can see that the MAC address of the gateway is properly resolved, and the network works properly by using other computers. Then the problem must be in the computer and the connection of ICMP or other data is blocked.

Check processes and services. no third-party firewall is installed, and the built-in firewall is not enabled.

Baidu search keyword"Destination host unreachable. ", Many people have mentioned a problem, that is, the IPSec Security policy prevents data passing, select the TCP/IP protocol in the NIC attribute, and enter" advanced "," option ", no IPSec is used, and no port filtering is performed.

Very confused, so I always thought of checking the system logs to see if there were any error information or records, and no relevant error records were found. However, at this point, we basically feel that it is a fault caused by IPSec.

Solution:

When you don't want to do anything, you have to start from the root: Enter the commandServices. MSC, Go to the service control panel, find the IPsec service, disable, restart, and solve the problem.