homelab/fedora/README.md

Fedora Server

• Fedora Server
  • Installation
  • Setup SSH
  • Fail2Ban
  • Automatic Updates
  • Disable Swap
  • Extras

https://docs.fedoraproject.org/en-US/fedora-server/installation/postinstallation-tasks/#_manage_system_updates

Note these instructions differentiate between an operator and a server. The operator can be any machine that configure the server. A pipeline, laptop, dedicated server, etc. are all options. The server can be its own operator, though that's not recommended since servers should be ephemeral and the operator will store information about each server.

Installation

1. Make sure to use custom disk partitioner and select btrfs.
2. Create an administrator. We'll give ssh root access later, but this gives you a cockpit user.
3. Ensure IPV6 connection is set to "eui64".
4. Set hostname

Setup SSH

On the operator:

export SSH_HOST=kube
ssh-keygen -t rsa -b 4096 -C ducoterra@"$SSH_HOST".reeselink.com -f ~/.ssh/id_"$SSH_HOST"_rsa

# Note: If you get "too many authentication failures" it's likely because you have too many private
# keys in your ~/.ssh directory. Use `-o PubkeyAuthentication` to fix it.
ssh-copy-id -o PubkeyAuthentication=no -i ~/.ssh/id_"$SSH_HOST"_rsa.pub ducoterra@"$SSH_HOST".reeselink.com

cat <<EOF >> ~/.ssh/config

Host $SSH_HOST
    Hostname "$SSH_HOST".reeselink.com
    User root
    ProxyCommand none
    ForwardAgent no
    ForwardX11 no
    Port 22
    KeepAlive yes
    IdentityFile ~/.ssh/id_"$SSH_HOST"_rsa
EOF

On the server:

# Copy authorized_keys to root
sudo cp ~/.ssh/authorized_keys /root/.ssh/authorized_keys

# Change your password
passwd

sudo su -
echo "PasswordAuthentication no" > /etc/ssh/sshd_config.d/01-prohibit-password.conf
echo '%wheel    ALL=(ALL)   NOPASSWD: ALL' > /etc/sudoers.d/01-nopasswd-wheel

On the operator:

# Test if you can SSH with a password
ssh -o PubkeyAuthentication=no ducoterra@"$SSH_HOST".reeselink.com

# Test that you can log into the server with ssh config
ssh $SSH_HOST

Fail2Ban

On the server:

dnf install -y fail2ban

# Setup initial rules
cat <<EOF > /etc/fail2ban/jail.local
# Jail configuration additions for local installation

# Adjust the default configuration's default values
[DEFAULT]
# Optional enter an trusted IP never to ban
ignoreip = 2600:1700:1e6c:a81f::0/64
bantime  = 6600
backend = auto

# The main configuration file defines all services but
# deactivates them by default. We have to activate those neeeded
[sshd]
enabled = true
EOF

systemctl enable fail2ban --now
tail -f /var/log/fail2ban.log

Automatic Updates

On the server:

dnf install dnf-automatic -y

systemctl enable --now dnf-automatic-install.timer

Disable Swap

swapoff -a
zramctl --reset /dev/zram0
dnf -y remove zram-generator-defaults

Extras

On the server:

# Set vim as the default editor
dnf install -y vim-default-editor  --allowerasing

# Install glances for system monitoring
dnf install -y glances

# Install zsh with autocomplete and suggestions
dnf install -y zsh zsh-autosuggestions zsh-syntax-highlighting

cat <<EOF > ~/.zshrc
# Basic settings
autoload bashcompinit && bashcompinit
autoload -U compinit; compinit
zstyle ':completion:*' menu select

# Prompt settings
autoload -Uz promptinit
promptinit
prompt redhat
PROMPT_EOL_MARK=

# Syntax Highlighting
source /usr/share/zsh-syntax-highlighting/zsh-syntax-highlighting.zsh
source /usr/share/zsh-autosuggestions/zsh-autosuggestions.zsh

### Custom Commands and Aliases ###
EOF

chsh -s $(which zsh) && chsh -s $(which zsh) ducoterra