Accessing Files On Redundant Device From Active Through Ssh - AudioCodes Mediant 4000 SBC User Manual

CHAPTER 33 HA Maintenance
2. Reset the redundant device.
The procedure assumes that no network changes were made to both devices' HA
Maintenance interface or Ethernet Devices (VLAN); otherwise, the devices may not be
able to communicate with each other.
Accessing Files on Redundant Device from Active
through SSH
From the active device, you can access files stored on the redundant device's flash memory,
through SSH (or SFTP). Once accessed, your SSH client can download files to your PC (e.g.,
debug file, locally stored CDR file, and Configuration Package file) or rename files (e.g., locally
stored CDR file). This eliminates the need to perform an HA switchover to change the redundant
device to active in order to access the device's files.
Access to the redundant device uses a proxy SSH server port on the active device. As this is a
secure connection, your SSH client needs to authenticate itself with the device (SSH server). The
device performs standard user authentication, where you can configure it to check the user's
credentials in the device's Local Users table or with a remote authentication server. Access is
granted only to users with Security Administrator user level.
➢
To access redundant device from active device for file download:
1. Enable SSH (see
2. Open the CLI Settings page (Setup menu > Administration tab > Web & CLI folder > CLI
Settings).
3. In the 'Redundant Proxy Port' field (SSHRedundantProxyPort), configure a port for SSH
through which the active device accesses the redundant device. This proxy port must be
different to the active device's regular SSH server port (configured in the 'Server Port'
parameter).
4. Click Apply.
The device may take a long time to prepare the debug file for transfer when it contains
much information. Some SFTP clients (for example, WinSCP and FileZilla) have a
short default connection timeout and if the file transfer is not started within this timeout,
the transfer attempt is aborted. Therefore, it is recommended to configure a longer
timeout for your SFTP client application.
Enabling SSH with RSA Public Key for CLI
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Mediant 4000 SBC | User's Manual
on page 56).