- VT-x is not enabled in the BIOS
- The CPU doesn't support VT-x
- Hyper-V virtualization is enabled in Windows
This is an error I encountered while running one of my virtual machines in VirtualBox. From Stack Overflow, these were these ere three common culprits for the type of error the user is seeing:
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While upgrading a Brocade ICX7250 firmware from version 8.0.30 to 8.0.40, I noticed issues on the ssh (scp) client of the switch while transferring firmware from a Linux SSH server. I executed this command on the Brocade switch with management IP (10.1.1.101) to copy the firmware (spz10106.bin) from the SSH server (10.1.1.111) SSH@TEST-SW1-7250#copy scp flash 10.1.1.111 spz10106.bin primary Below is the error logs from the Linux server (10.1.1.111). Jan 8 17:57:13 linux_server sshd[19405]: fatal: Unable to negotiate with 10.1.1.101 port 7509: no matching key exchange method found. Their offer: diffie-hellman-group1-sha1 [preauth] We have been running wired 802.1x/NAC for quite awhile and managed to stabilized/chink out some issues. In this, post I will provide ONLY the configuration template on the HP Comware 5.2 switches. For the RADIUS/NPS setup, kindly search Microsoft NPS RADIUS configuration. For clients side, 802.1x supplicant should be enabled/configured. Below are configuration steps and template to enable 802.1x on HP Comware switches. Step 1: Configure RADIUS Scheme radius scheme <radius_servers_scheme> I am posting here my simple configuration template for hardening the HP Comware network devices. This template currently works well with Comware Version 5.2.
Configuration template !##### Enter System-View mode ##### In the template, all lines which begin with "!" will not be processed by the Comware CLI (command line interface). Again, ensure all variables "<>" are replaced with the correct values in your environment. Example <admin_workstation_ip> is replaced with 192.168.1.201 (note: no more <>). After applying the configuration, review the configuration display current-configuration Onced confirmed, save the configuration save force For more information and other options in hardening HP Comware network devices, kindly refer to this URL. |
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