What Are Possible Causes of a Host verification failure?

If connectivity verification fails for a host, check the following items:

1. Username and password.
2. Startup status.
3. Ports: Check that ports on the host have been enabled.
4. Firewall policy: Run the iptables -L -n command to check whether access over port 22 is restricted.
5. The IP address must be accessible from the public network. If you are using a private IP address, an SSH proxy is required.
6. CentOS version: If the host is running CentOS, ensure that the CentOS version is 6.0 or later.
7. Windows version: If the host is running Windows, ensure that the Windows version is supported by CodeArts Deploy and you have configured the host. For details, see Configuring the Host Running Windows in the User Guide.