A host fingerprint is a unique identifier for Bastionhost to identify a Linux host that uses SSH. Bastionhost checks the access permissions on hosts based on host fingerprints. This prevents malicious users from accessing unauthorized hosts by using traffic redirection. If the original fingerprints of hosts are invalid, you must clear the host fingerprints. Otherwise, you cannot perform O&M operations on the hosts. This topic describes how to clear host fingerprints.
Background information
Bastionhost uses a host fingerprint to uniquely identify a Linux host. If you clear the fingerprint of a host, no impacts are imposed on your O&M operations. The next time you maintain the host, Bastionhost automatically generates a new fingerprint for the host.
Clear the fingerprint of a single host
To clear the fingerprint of a single host, perform the following steps.
Log on to the Bastionhost console. In the top navigation bar, select the region in which your bastion host resides.
In the bastion host list, find the bastion host that you want to manage and click Manage.
In the left-side navigation pane, choose .
Find the host whose fingerprint you want to clear and click its name.
On the Basic Info tab of the panel that appears, click Clear next to the host fingerprint.
After the fingerprint is cleared, a message indicating that The host fingerprint is reset. appears, and No host fingerprint. is displayed in the Host Fingerprint section of the Basic Info tab.
Clear the fingerprints of multiple hosts at a time
To clear the fingerprints of multiple hosts at a time, perform the following steps.
Log on to the Bastionhost console. In the top navigation bar, select the region in which your bastion host resides.
In the bastion host list, find the bastion host that you want to manage and click Manage.
In the left-side navigation pane, choose .
On the Hosts page, select the hosts whose fingerprints you want to clear and choose .
In the message that appears, click OK.
After the operation is complete, a message indicating that The host fingerprint is reset. appears.