Having recently setup OpenVAS (something I will likely blog about in further detail soon) I have found out that the default out of box deployment of Aruba-OS (formally ProCurve) supports a number of insecure SSH Algorithms with messages similar to the ones below logged even when running the latest firmware releases (YA.16.03.0004 on the 2530 series).
SSH Weak Encryption Algorithms Supported
The remote SSH server is configured to allow weak encryption algorithms.
SSH Weak MAC Algorithms Supported
The remote SSH server is configured to allow weak MD5 and/or 96-bit MAC algorithms.
To secure the switch simply run the following commands while logged into the switch
no ip ssh cipher aes128-cbc
no ip ssh cipher 3des-cbc
no ip ssh cipher aes192-cbc
no ip ssh cipher aes256-cbc
no ip ssh cipher email@example.com
no ip ssh cipher aes128-ctr
no ip ssh cipher aes192-ctr
no ip ssh mac hmac-md5
no ip ssh mac hmac-sha1-96
no ip ssh mac hmac-md5-96
Although it may not be the most glamorous side of IT every sysadmin will appreciate the value of a rock solid backup system. All too often though these systems do not extend down to the ’embedded’ systems like network switches and firewalls.
However with a little WinSCP (and its fantastic .NET assembly automation package) and PowerShell combined its pretty easy to cook up something that is 100% less of the cost of any management solution.
This guide shows how to setup the backup of a HP ProCurve switch (I’ve tested it with the ProCurve 8200 series, 5400 series the 2920s, a 2626 and a 2530 all of which were running the most recent firmware) although it should be a simple matter of changing the relevant paths to make it work with other manufacturers kit (e.g. Cisco).
First up grab the source files from the link below and extract the contents to C:\Network Switch Backup (you can use any other path but will just need to update the paths inside the PowerShell) you should then have a folder which contains a .cmd file, a .ps1, a sample .csv and a sub folder called Backups.
Network Switch Backup (1.7 KiB, 1,731 hits)
Getting your Switch ready and filling out the CSV
Each switch will now need ip ssh and ip ssh filetransfer running on it through the CLI (if its not already setup); be sure to set a manager password (if you haven’t done so already!) as well. In addition you will need to find the Server host key fingerprint for each switch; the screen shots below show one way of doing this.Continue reading