0

Unix & Linux: Multiple SSH keys - not identifying

On the next screen, you can name the license keys. You can authorize multiple keys by adding multiple public keys to the list. SSH private keys into the SSH authentication agent for implementing single sign-on with SSH. Here's how to do it. How to manually add ssh keys for key. In this tutorial, we will teach you how to use ssh with cygwin and add it to application. Ccs c compiler crack for windows.

1

Hosting - Add multiple SSH keys to a new server - Server Fault

Should we have to add public key to .ssh/authorized_keys

Its on again alicia keys album https://zlatdetki.ru/forum/?download=4869. Before adding a new SSH key to the ssh-agent to manage your keys, you should have checked for existing SSH keys and generated a new SSH key. If you have an account that you access from two different locations, add both keys to that account. Before you create a new key, StackPath recommends that you check to see if you have an existing key. Keys may be supplied in either the OpenSSH format (key starts with ssh-rsa or ssh-dss) or the RFC 4716 format (file starts with - BEGIN SSH2 PUBLIC KEY -). This makes it easier to identify which key is being assigned to what.

2

How to enable SSH on Hass.io using encrypted keys

Note: On Compute Engine, OpenSSH 8.2 is currently supported on VMs running Ubuntu 20.04 LTS only. Black keys house remix. Add a final rule to allow connections from other IP address. If you require SSH access for multiple users, the use of SSH keys instead of individual logins can bypass many of the headaches involved in user management without violating PCI DSS. The full story is a little complex, but something like this: I did once successfully add an SSH key to my new account, then couldn't successfully add a Deploy key. But, unlike passwords, private keys generally aren't used in multiple places, nor are they transmitted anywhere.

Multiple SSH keys for different GitHub accounts

Cracked apps cydia ipad 2 look at these guys. I have one main computer, call it "A", and two others, call them "B" and "C". It is implemented as a shell script which drives both ssh. We will also show you how to set up an SSH key-based authentication and connect to your remote Linux servers without entering a password. Both keys are required for a. However, accumulating junk in this file can create performance issues, and can make troubleshooting, auditing, and other admin tasks more difficult.

3

Setting up multiple SSH keys to manage multiple git

This first short wil learn us how to generate a key without a passphrase, and use it in a console.

  • How to manage multiple SSH key pairs
  • Howto use multiple SSH keys for password less login
  • Ssh-add program - Usage, ssh-agent, SSH keys
  • Best way to use multiple SSH private keys on one client
  • How to set up and use SSH keys - Time4VPS community
4

How to Add SSH Public Key to Server - Linux Handbook

SSH key pairs enable a client to connect to the server using the SFTP protocol. Add multiple keys to ssh. Among them are the commands BssCfg settings exportText and importText. One, and probably the only one, of PuTTY drawbacks is that you need to start a new copy of PuTTY every time you open a new connection. PuTTY is the most popular SSH client for Windows. Is it possible to have multiple SSH keys?

Managing public SSH keys for access to an application

Avast 2020 license key 2038425688 https://zlatdetki.ru/forum/?download=2925. Managing public SSH keys for access to an application running as non-root user. I've also changed the UI on 'My Account' page. Ansible uses SSH which allows users and ansbile too; to log in to remote servers and perform management tasks. While a password can eventually be cracked with a brute force attack, SSH keys are nearly impossible to decipher by. Windows 7 build 7601 genuine activator.

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How to download and upload files over SSH – TecAdmin

I've got a few servers and have a few developers that need access and root access to them. It also provides a level of confidence that the client is communicating with a known host through the use of host keys, which can be configured to only allow a connection to a host whose public finger print is pre-registered with the SSH client. Host keys won't be cached there unless that's specifically requested. Fix issue with multiple AuthorizedKeysFile entries. I was reading about SSH key authentication and setting it up with my 3 computers at home. This New Video shows how to generate SSH keys for GitLab Profile (2020) in user settings, option just above GPG Keys for windows OS using Git Bash GUI.

How to add multiple ssh keys for a single user

When it comes to Git authentication, I prefer to authenticate using SSH keys, so I end up with multiple SSH keys on my machine. It's fine if you have multiple SSH keys on one account, any one of those SSH keys will then identify you as that user. For example, to add a user's public SSH key to a project or instance, you need access to the public key file for their key. Essentially you will be using ssh-add to add the extra keys so that the agent can utilize them. Sign Up Log In DoCS pricing Teams. I created an SSH-Agent to provide my key to the ssh/scp cmd when connecting to my server.

6

SSH with security keys

How can multiple private keys be used with ssh? Figure 9 – Assigning a name to. These scenarios are scoped only to a situation in which the VM is provisioned by using cloud-init and the user selects additional Azure features that rely on certificates, such as a system-managed service identity. There have been incidents when thousands. Multiple SSH keys can be added to workloads to allow more than one user to connect and manage the virtual machine. Mindmanager 2020 with crack.

MikroTik CRS326-24G-2S+RM vs Ubiquiti ES-48-LITE

Goals:
  1. 2x 10gbit aka SFP+
  2. 24x+ 1gbit
  3. Web UI with LetsEncrypt SSL certificates
  4. SFP+ links work consistency on system reboot
Caveats:
I could easily focus on other goals. Both switches have lots of features, and their own pluses and minuses. I am only trying to meet my limited goals.
 
ES-48-LITE:
  I bought this in April of 2017 from Amazon for $390.40($358.99+ $31.41 tax). It is a nice switch, and isn't too noisy like some higher end models. It works well in my home office.
 
  It easily checks goals 1 and 2. It checks the Web UI and SSL parts of goal 3, but not LetsEncrypt. When I first got it I was just buying a wildcard SSL certificate, *.mydomain.tld for $42 from AlphaSSL through SSL2Buy. Since then LetsEncrypt has taken off, and now supports wildcard certificate itself. I now no longer see a good reason to pay for SSL certificates in most cases. Given the ES-48-LITE's limited OS I didn't see a good way to automate the process of uploading a certificate. Even better would be built-in support, or the ability to run a LetsEncrypt client natively on the switch. I am not aware of any switch that lets you do that.
 
  Something I had been living with since day one with the ES-48-LITE is that it doesn't consistency re-establish the SFP+ links on system reboot. This has been very annoying, but I don't reboot my two SFP+ systems that often, so I have lived with it. This is how the ES-48-LITE doesn't meet goal 4.
 
  I have tried multiple SFP+ DAC cables, multiple fiber transceivers, different 10gbit SFP+ cards, and switch firmware upgrades. Nothing has resolved this issue. This issue also isn't unique to me. I have over the years read many forum threads of people having the same problems.
 
MikroTik CRS326-24G-2S+RM:
  I considered a MikroTik switch back when I bought the ES-48-LITE. It seemed at the time that Ubiquiti was a little higher end, and obviously has more ports.
 
  Given my problems with the ES-48-LITE I reconsidered, and found I could get a CRS326-24G-2S+RM from Amazon for $199.99($184.75+$15.24 tax). I ordered it, and set it up last night. It out of the box obviously meets goals 1 and 2.
 
  My first impressions of it are that it is small and quiet. That it has an external power supply is a downside, but acceptable.
 
  With the CRS326-24G-2S+RM booted into RouterOS I can automate the upload of a LetsEncrypt certificate with https://github.com/gitpel/letsencrypt-routeros . This is enabled by RouterOS's support for SCPing files. I didn't need it to generate the SSL certificate via certbot, because I am already generating a wildcard certificate on my NAS with lego, https://github.com/go-acme/lego . So I commented out the calls to certbot, and changed it to read my lego certificate. This meets goal 3.
 
  So far in my testing the CRS326-24G-2S+RM meets goal 4, because reboots of the systems don't intermittently drop the link.
 
  The first issue was I couldn't get ssh keys to work. My first thought was key size. My second thought was the newer OpenSSH key format. What I ended up finding is that my newer OpenSSH client, 8.4, didn't like the signature algorithm. I only found this with the -v option for the ssh command. The error was "debug1: send_pubkey_test: no mutual signature algorithm". Googling that I found "PubkeyAcceptedKeyTypes ssh-rsa" in my ~/.ssh/config for this Host allowed the two to work together. I also needed to set "PreferredAuthentications publickey" to get it to not start by asking for a password first. The dedicated key is not required, but makes it work for my circumstance.
 
.ssh/config:
Host 192.168.1.254 User username IdentityFile /home/username/.ssh/id_rsa.mikrotik PreferredAuthentications publickey PubkeyAcceptedKeyTypes ssh-rsa 
 
  The second issue I found while troubleshooting the first. I had set "always-allow-password-login" to allow me to use a password as an alternative to the ssh-key, as you would expect. What I found is if the user doesn't have a password set it will allow you to login with a blank password. So no password is really a blank password. The solution is to set a password. I understand why people might want a blank password, but as is it leads to an unexpected bad security outcome. This would be fixed by an explicit no password option.
 
  The third issue was some minor packet loss. This was causing noticeable hiccups in interactive sessions across the network. Googling this I found this isn't unheard of. The first link's solution was an invalid configuration change. The second link had the working solution. This helped a little, but was more of a band-aid. In the end I realized it is probably counter productive once you actually fix it.
 
/ip firewall mangle add chain=prerouting out-interface=!local action=change-ttl new-ttl=set:64 passthrough=yes <-- invalid on my CRS326-24G-2S+RM with RouterOS in bridge mode with the latest firmware /ip firewall mangle add chain=postrouting out-interface=!ether1 action=change-ttl new-ttl=set:64 passthrough=yes <-- works 
 
First link: https://forum.mikrotik.com/viewtopic.php?t=87430
Second link: https://forum.mikrotik.com/viewtopic.php?t=144140
 
  I tried switching to SwOS from RouterOS. I tried enabling flow control. I tried different queue types on the ports. I tried all kinds of things. I almost gave up and returned the switch to Amazon at this point. I was testing it by first doing 100 pings, then 1000, and finally 10000. I thought it was the switch, because I would swap the cables back to the ES-48-LITE and see no packet loss. In the end I found if I swapped to DAC cables from my fiber cables and transceivers, it is almost perfect. I say almost perfect, because I do sometimes see one dropped packet in 10000 on the SFP+ 10gbit links. It is good enough for me.
 
  My fourth issue is that upgrades of the firmware seem to be a little glitchy. Sometimes it acts like it did it, and then later I find it is still on the older version. It seems to work better going through System | RouterBOARD and not QuickSet.
 
Final words:
  The Mikrotik CRS326-24G-2S+RM is the cheaper and overall better solution, when compared to the ES-48-LITE. It isn't without it's annoying quirks.
submitted by edgan to homelab

7

How-to: Passwordless SSH

While this forum is focused on the Pi-hole software itself and not on the system administration of the host, many people here will be fairly new to the world of Linux and system administration, so things like SSH access may not be fully understood. This post will attempt to answer some of the questions that are likely to come up if you haven't managed a Linux machine before.
For Pi-hole specific questions, see the pinned post in this subreddit.

Background on SSH Keys

The following section provides some basic background on SSH Keys and public key cryptography. If you already are familiar or are not interested, you may skip this section.
>! SSH is just a protocol for remotely accessing a shell (Secure SHell). Many systems require authentication before accessing the shell, as you can wreak a lot of havoc with shell access. The default method is to use a username and password. This is fine, but passwords are typically either too short to be really secure, or too long to be convenient. Another authentication method uses a technique called public key cryptography to handle the identity verification automatically, without the need for typing a password.
In public key crypto, a user has two keys: a public one and a private one. I won't go into the math, as it's quite complex, but just know that these keys are simply a very large integer encoded as text. The two keys are mathematically entwined, though they have an important property that makes it impossible (within the constraints of modern computers) to derive one key in a pair given the other. Thus, just knowing the public key gives you no information about the private key.
So how is this used for authentication? Well, think of the keys like an identification card, like your passport or drivers license. There is some info on the card that you can give out publicly for other people to verify you (ie the name and photo) and other info that you want to keep “secret” (ie date of birth, card number, etc), lest someone impersonate you. In terms of SSH keys, these correspond to the public and private keys, respectively.
The above analogy isn’t perfect, because you can and do actually share all the info on your license/passport when you give it to someone. However, with SSH keys, the mechanism is a bit different. The private key is used to generate a proof that you are yourself while the public key is used by the other party to verify your proof.
Consider the classical cryptography example of Alice and Bob. Suppose Alice wants to tell a secret to Bob, but needs to be sure it’s really Bob she’s talking to. In person, we might ask for some fact that only Bob would know, like the dish ordered on their first date, but that requires Alice to know the correct answer too. Instead, Alice asks Bob a math problem, which Bob solves using his private key. Alice can then verify the answer using Bobs public key, and if correct then she knows she’s talking to the real Bob. Note that the public key had to be shared with Alice ahead of time.
Back to SSH, we can use the public and private keys in much the same way as Alice and Bob to make sure the person accessing the shell is authorized. By keeping a list of the public keys of the people we want to grant access, we can simply ask a new user this math problem, then try to verify it with each public key we have. If any of them match, we let the user in.
Note that the private key is held by the party trying to prove their identity, while the public key is given to the remote host. The mechanism to share the public key must be trusted (or someone could substitute their own public key instead of yours) and is a fairly complicated part of cryptography. We will ignore that though and assume that you have a trusted way to distribute the key (i.e. by logging in with a password, or physical access to the host). !<

Passwordless SSH

Typing a password each time you log into your remote system is tedious. Instead, we can use public/private key pairs to do the authentication automatically, as described in the last section.
This should work for any Unix-like target system, including Raspberry Pi, Linux VM's, etc.

Check for existing SSH Keys

You may already have some keys generated on your system. Run the following command on your primary computer to check: bash ls ~/.ssh
If the .ssh directory does not exist, you have no keys, so continue to the next section. If it does, you may see several files, including authorized_keys, known_hosts, id_rsa, id_rsa.pub, etc. If you have two files with names like name and name.pub, those are a key pair. You can either choose to use that or create a new pair by following the steps in the next section.

Create a new key pair

See these instructions from Gitlab for a more complete guide.
The basic steps to create a new key pair is to run one of the following two commands on you primary computer: ```bash ssh-keygen -t rsa -b 4096 -C "Comment"

or

ssh-keygen -t ed25519 -C "Comment" ```
The -t argument specifies the type of key. RSA and ED25519 are just two different formats for the keys. ED25519 is a more compact representation and the math to verify it is simpler (and thus faster) while potentially being more secure than RSA. That doesn't mean RSA is insecure though, as long as the key size is large enough.
The -b flag sets the key size for the RSA key. The bigger the key, the harder it is to guess the secret ("break the key"). A size of 2048 is the minimum recommended size, with 4096 providing better security without much impact on performance. Larger sizes are possible, but computation becomes more difficult to verify larger keys.
The -C flag allows you to attach a comment to your key. I recommend doing this so you can easily tell what that massive string of letters and numbers corresponds to. I normally use comments like "@", though you may also wish to put the purpose of the key in the comment if you intend to have different keys for different services.
You can usually accept all of the defaults presented by the ssh-keygen command. The exception may be the file name, which you may want to set to something descriptive if you plan on having multiple keys. If you will only use one key, the default of id_rsa or id_ed25519 is fine.
Take note that if you enter a passphrase for the key, it will be required to use the key. This may improve security (if you use a different password than your computer), but kind of defeats the point of passwordless SSH. If you accidentally entered a passphrase, you can reset it with bash ssh-keygen -p -f /path/to/ssh/key

Copying public key

Once you've got a key pair that you want to use, we must tell the target system about the public key so it knows how to authenticate you. Note that the private key must be kept a secret on the machine which you will use to log in (the local machine) and should not be copied to the remote machine, posted online, etc.
The easiest way to accomplish this is with the ssh-copy-id: bash ssh-copy-id @
If that fails, you can copy it manually via SSH: bash cat ~/.ssh/.pub | ssh @ 'mkdir -p ~/.ssh && cat >> ~/.ssh/authorized_keys'

Using SSH key automatically

If you chose the default key name, SSH will pick it up automatically and you can skip this section. Otherwise, to ensure that the key is used by the local machine when attempting to authenticate, you must tell the SSH agent about it. First, make sure the agent is running then tall it to add the new key. bash eval "$(ssh-agent -s)" ssh-add /path/to/private/key On macOS, use ssh-add -K /path/to/private/key to store it in the system keychain.
You may also want to update your SSH config, especially if you will be logging in as a user with a different name (ie pi or piuser in the context of Pihole). You may also set a nickname so you can type ssh pi instead of ssh 192.168.0.10 or ssh pi.hole etc. ```bash vim ~/.ssh/config # or nano, atom, gedit, text edit, etc.

Add the following to configure SSH to

Host Hostname User PreferredAuthentications publickey, password IdentityFile ~/.ssh/ ```
For more info and tutorials see the following links: * RaspberryPi Docs * Gitlab SSH Key docs * Digital Ocean SSH Key docs
submitted by QWERTYroch to pihole