This is a guide for setting up an Apple Mac OS X workstation with SSH key-based authentication to a remote FreeBSD server. I won’t go into any detail about these protocols or try to make a case for using them. If you’re reading this, you probably already have a basic grounding on SSH, SFTP.
Jun 28, 2016 I recommend adding something like AllowGroups wheel staff to /etc/ssh/sshdconfig.See sshdconfig(5) for a description. That provides a nice additional layer of protection, just in case one of the standard users gains a weak or null password (which really should not happen, but it's still nice to know that ssh is limited to only the real users who actually need it, following the security best. The simplest way to create SSH key on Windows is to use PuTTYgen. Download and run PuTTYgen. Click the 'Generate' button. For additional security, you can enter a key passphrase. When you're creating a FreeBSD virtual machine by using the Azure portal, you must provide a user name, password, or SSH public key. User names for deploying a FreeBSD virtual machine on Azure must not match names of system accounts (UID.
[donotprint][/donotprint]To regenerate keys you need to delete old files and reconfigure openssh-server. It is also safe to run following commands over remote ssh based session. Your existing session shouldn’t be interrupted.
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Why regenerate new ssh server keys?
Most Linux and Unix distribution create ssh keys for you during the installation of the OpenSSH server package. But it may be useful to be able re-generate new server keys from time to time. For example, when you duplicate VM (KVM or container) which contains an installed ssh package and you need to use different keys from cloned KVM VM guest/machine.
Steps to regenerate OpenSSH host keys on Linux
Let us see all steps
Step 1 – Delete old ssh host keys
Login as the root and type the following command to delete files on your SSHD server:
# /bin/rm -v /etc/ssh/ssh_host_* Sample outputs: Step 2 – Debian or Ubuntu Linux Regenerate OpenSSH Host Keys
Now create a new set of keys on your SSHD server, enter:
# dpkg-reconfigure openssh-server Sample output:
You just regenerated new ssh server keys. You need to restart ssh server:
$ sudo systemctl restart ssh OR $ /etc/init.d/ssh restart
Step 3 – Update all ssh client(s) known_hosts files
Finally, you need to update ~/.ssh/known_hosts files on client computers, otherwise everyone will see an error message that read as follows:
Either remove host fingerprint or update the file using vi text editor (command must be typed on client machine):
$ ssh-keygen -R remote-server-name-here Now login using the ssh command: $ ssh [email protected]
Ssh Update Host KeyConclusion
You just regenerated OpenSSH Host Keys on a Debian or Ubuntu Linux using the dpkg-reconfigure command. For more info see the man page or this wiki page here:
$ man dpkg-reconfigure
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This article provides an overview of running a FreeBSD virtual machine in Azure.
Overview
FreeBSD for Microsoft Azure is an advanced computer operating system used to power modern servers, desktops, and embedded platforms.
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Microsoft Corporation is making images of FreeBSD available on Azure with the Azure VM Guest Agent pre-configured. Currently, the following FreeBSD versions are offered as images by Microsoft:
The agent is responsible for communication between the FreeBSD VM and the Azure fabric for operations such as provisioning the VM on first use (user name, password or SSH key, host name, etc.) and enabling functionality for selective VM extensions.
As for future versions of FreeBSD, the strategy is to stay current and make the latest releases available shortly after they are published by the FreeBSD release engineering team.
Create a FreeBSD VM through Azure CLI on FreeBSD
First you need to install Azure CLI though following command on a FreeBSD machine.
If bash is not installed on your FreeBSD machine, run following command before the installation.
How can I find the private key for my SSL certificate. If you just got an issued SSL certificate and are having a hard time finding the corresponding private key, this article can help you to find that one and only key for your certificate. I purchased SSL certificate from slss.com and I've downloaded a file to my local pc there are.crt, ca-bundle, and p7b file and I've copied the files to the server and I'm trying to install the cert. To an apache2 web server but it requires a.key file and I don't know how to locate(if it exists) or how to convert one of the files to.key file using openssl or other methods. May 15, 2015 This article will show you how to combine a private key with a.p7b certificate file to create a.pfx file on Windows Internet Information Server (IIS). These instructions presume that you have already used “Create Certificate Request” from within IIS to generate a private key and CSR on the server/laptop you are using. Ssl generate private key from ca-bundle or p7b.
If python is not installed on your FreeBSD machine, run following commands before the installation.
During the installation, you are asked
Modify profile to update your $PATH and enable shell/tab completion now? (Y/n) . If you answer y and enter /etc/rc.conf as a path to an rc file to update , you may meet the problem ERROR: [Errno 13] Permission denied . To resolve this problem, you should grant the write right to current user against the file etc/rc.conf .
Now you can sign in to Azure and create your FreeBSD VM. Below is an example to create a FreeBSD 11.0 VM. You can also add the parameter
--public-ip-address-dns-name with a globally unique DNS name for a newly created Public IP.
Then you can sign in to your FreeBSD VM through the ip address that printed in the output of above deployment.
VM extensions for FreeBSD
Following are supported VM extensions in FreeBSD.
VMAccess
The VMAccess extension can:
CustomScript
The CustomScript extension can:
Note
FreeBSD VM only supports CustomScript version 1.x by now.
Authentication: user names, passwords, and SSH keys
When you're creating a FreeBSD virtual machine by using the Azure portal, you must provide a user name, password, or SSH public key.User names for deploying a FreeBSD virtual machine on Azure must not match names of system accounts (UID <100) already present in the virtual machine ('root', for example).Currently, only the RSA SSH key is supported. A multiline SSH key must begin with
---- BEGIN SSH2 PUBLIC KEY ---- and end with ---- END SSH2 PUBLIC KEY ---- .
Freebsd Ssh Generate Host Key WestObtaining superuser privileges
The user account that is specified during virtual machine instance deployment on Azure is a privileged account. The package of sudo was installed in the published FreeBSD image.After you're logged in through this user account, you can run commands as root by using the command syntax.
You can optionally obtain a root shell by using
sudo -s .
Known issues
The Azure VM Guest Agent version 2.2.2 has a known issue that causes the provision failure for FreeBSD VM on Azure. The fix was captured by Azure VM Guest Agent version 2.2.3 and later releases.
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