Cisco Cisco IPS 4255 Sensor

For the IPS 4240, IPS 4255, IPS 4260, and IPS 4270-20, use the ROMMON to restore the 
system image.

For the AIM IPS and NME IPS, use the bootloader.

For the IDSM2 reimage the application partition from the maintenance partition.

For the AIP SSM, reimage from the adaptive security appliance using the hw-module module 
1 recover configure/boot command.

When you install the system image for your sensor, all accounts are removed and the default account and 
password are reset to cisco.

For the procedures for reimaging sensors, refer to 

You must log in to Cisco.com using an account with cryptographic privileges to download software. The 
first time you download software on Cisco.com, you receive instructions for setting up an account with 
cryptographic privileges. 

Do not change the filename. You must preserve the original filename for the sensor to accept the update. 

To upgrade the sensor, follow these steps:

Download the appropriate file (for example, IPS-K9-7.0-4-E4.pkg) to an FTP, SCP, HTTP, or HTTPS 
server that is accessible from your sensor.

Log in to the CLI using an account with administrator privileges.

Enter configuration mode.

sensor# configure terminal

Upgrade the sensor.

sensor(config)# upgrade url/IPS-K9-7.0-4-E4.pkg

The URL points to where the update file is located, for example, to retrieve the update using FTP, enter 
the following:

sensor(config)# upgrade ftp://username@ip_address//directory/IPS-K9-7.0-4-E4.pkg

Enter the password when prompted.

Enter password: ********

Enter 

 to complete the upgrade.