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Update SSH Help file

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IntenseWebs 2024-04-04 09:26:46 -05:00
parent aacd55a2b2
commit f89c8c05c2
1 changed files with 13 additions and 22 deletions
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35
02-ssh-help.txt
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@ -2,27 +2,27 @@
# ssh-keygen -o -a 100 -t ed25519 -f ~/.ssh/id_ed25519 -C "john@example.com"
# Generate OpenSSH Private Key id_rsa and Public Key id_rsa.pub (4096, 7680, 15360)
ssh-keygen -t rsa -b 4096 -C "user@website.com"
----------------------------------------------------------
# ENABLE root access during OS install with password but don't enable SSH remote login for 'root'.
# DEBIAN--LOGIN AS ROOT - Adding SUDO
su - root
sudo apt update && sudo apt upgrade
apt install sudo
----------------------------------------------------------
# ADD username to /etc/sudoers right under root user
vi /etc/sudoers
# username ALL=(ALL) ALL
username ALL=(ALL) ALL
----------------------------------------------------------
# vi /etc/sudoers.d/mynewuser
# mynewuser ALL=(ALL) NOPASSWD: ALL
chmod 440 /etc/sudoers.d/mynewuser
# chmod 440 /etc/sudoers.d/mynewuser
----------------------------------------------------------
sudo apt install openssh-server
systemctl enable sshd
systemctl start sshd
# sudo firewall-cmd --add-service=ssh --permanent && firewall-cmd --reload
# Switchback to normal user and add public key to authorized_keys
----------------------------------------------------------
# Switchback to normal user and create .ssh folder & files
cd ~
mkdir .ssh
cd .ssh
@ -31,10 +31,10 @@ cd ~
chmod go-w ~/
chmod 700 ~/.ssh
chmod 600 ~/.ssh/authorized_keys
# Restart machine, Switchback to existing working machine with SSH authorized_keys installed
----------------------------------------------------------
# Restart machine, Switchback to existing working machine with SSH authorized_keys installed add public key to authorized_keys
ssh-copy-id -f user@hostname.domain.com
----------------------------------------------------------
# IMPORTANT -DISABLE SSH PASSWORDS - Only uses Public w/Private Keys for SSH. Local Console logins with passwords is still allowed.
su - root
cd /etc/ssh
@ -43,19 +43,17 @@ PasswordAuthentication no
PermitRootLogin no
systemctl restart sshd
----------------------------------------------------------
# TO REMOVE OLD KEYS FROM known_hosts file
ssh-keygen -f "/home/privacy/.ssh/known_hosts" -R "192.168.1.124"
----------------------------------------------------------
#AGENT for Private Keys on Linux - MANUAL run ssh-agent and add ssh private key.
eval "$(ssh-agent -s)"
chmod 600 /c/Users/username/Documents/SETTINGS/id_rsa
ssh-add /c/Users/username/Documents/SETTINGS/id_rsa
ssh-add /directory/my_id_rsa
----------------------------------------------------------
# To create a systemd ssh-agent service, you need to create a file in ~/.config/systemd/user/ssh-agent.service because ssh-agent is user isolated.
vi ~/.config/systemd/user/ssh-agent.service
[Unit]
Description=SSH key agent
@ -77,14 +75,9 @@ systemctl --user enable --now ssh-agent
# This will instruct the ssh client to always add the key to a running agent, so there's no need to ssh-add it beforehand. Note that when you create the ~/.ssh/config file you may need to run:
chmod 600 ~/.ssh/config
---------------------------------------------------------
# FOR WINDOWS - Add the ssh-agent as a auto-starting Service. KeyPassXC will add the private keys to the agent when it starts.
https://github.com/PowerShell/Win32-OpenSSH/releases/tag/v9.1.0.0p1-Beta
https://learn.microsoft.com/en-us/windows-server/administration/openssh/openssh_keymanagement#user-key-generation
# Powershell install
dism /online /Get-Capabilities /Format:Table | findstr -i ssh
@ -101,9 +94,7 @@ Status Name DisplayName
------ ---- -----------
Running ssh-agent OpenSSH Authentication Agent
# List Keys in ssh-agent
ssh-add -l
ssh-add -L