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Update freebsd/freebsd-secure.sh

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Minecon724 2025-08-06 18:05:55 +02:00
commit a65a5e04f8
1 changed files with 34 additions and 26 deletions
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60
freebsd/freebsd-secure.sh
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@ -18,8 +18,22 @@ pw useradd -n "$USERNAME" -m -s /usr/local/bin/bash -w no
# --- WireGuard setup ---
echo "Configuring WireGuard..."
WG_SUBNET="fc$(openssl rand -hex 1):$(openssl rand -hex 2):$(openssl rand -hex 2):$(openssl rand -hex 2)"
WG_LISTEN_PORT=$(jot -r 1 49152 65535)
if [ -z "$WG_CLIENT_IP" ] || [ -z "$WG_SERVER_IP" ]; then
SUB_START="fc$(openssl rand -hex 1):$(openssl rand -hex 2):$(openssl rand -hex 2):$(openssl rand -hex 2)"
WG_CLIENT_IP="$SUB_START::2"
WG_SERVER_IP="$SUB_START::1"
SUBNET_MASK=64
fi
if [ "$WG_CLIENT_IP" == *"."* ]; then
HOST_MASK=32
else
HOST_MASK=128
fi
WG_LISTEN_PORT=${WG_LISTEN_PORT:-$(jot -r 1 49152 65535)}
WG_PRESHARED_KEY=${WG_PRESHARED_KEY:-$(wg genpsk)}
WG_LOCAL_PRIVKEY=$(wg genkey)
WG_LOCAL_PUBKEY=$(echo "$WG_LOCAL_PRIVKEY" | wg pubkey)
@ -29,11 +43,12 @@ cat <<EOF > /usr/local/etc/wireguard/vmh-ssh-vpn.conf
[Interface]
ListenPort = $WG_LISTEN_PORT
PrivateKey = $WG_LOCAL_PRIVKEY
Address = $WG_SUBNET::1/64
Address = $WG_SERVER_IP/$SUBNET_MASK
[Peer]
PublicKey = $WIREGUARD_PUBKEY
AllowedIPs = $WG_SUBNET::2/128
PresharedKey = $WG_PRESHARED_KEY
AllowedIPs = $WG_CLIENT_SUBNET/$HOST_MASK
EOF
chmod 600 /usr/local/etc/wireguard/vmh-ssh-vpn.conf
@ -54,27 +69,19 @@ chmod 700 /home/"$USERNAME"/.ssh
chmod 600 /home/"$USERNAME"/.ssh/authorized_keys
chown -R "$USERNAME":"$USERNAME" /home/"$USERNAME"/.ssh
cp /etc/ssh/sshd_config /etc/ssh/sshd_config.bak
mkdir /etc/ssh/sshd_config.d
set_sshd_config() {
local key="$1"
local value="$2"
if grep -q "^${key}" /etc/ssh/sshd_config; then
# Replace existing line
sed -i '' "s/^${key}.*/${key} ${value}/" /etc/ssh/sshd_config
else
# Add new line if not found
echo "${key} ${value}" >> /etc/ssh/sshd_config
fi
}
echo "Include /etc/ssh/sshd_config.d/*.conf" >> /etc/ssh/sshd_config
sed -i '' '/^ListenAddress/d' /etc/ssh/sshd_config
echo "ListenAddress $WG_SUBNET::1" >> /etc/ssh/sshd_config
cat <<EOF > /etc/ssh/sshd_config.d/10-vmh-ssh.conf
X11Forwarding no
PasswordAuthentication no
PubkeyAuthentication yes
PermitRootLogin no
ListenAddress $WG_SERVER_IP
EOF
set_sshd_config "X11Forwarding" "no"
set_sshd_config "PasswordAuthentication" "no"
set_sshd_config "PubkeyAuthentication" "yes"
set_sshd_config "PermitRootLogin" "no"
service sshd restart
@ -99,17 +106,18 @@ echo "1. Install the WireGuard config (fill in the gaps)"
echo
echo "[Interface]"
echo "PrivateKey = ..."
echo "Address = $WG_SUBNET::2/64"
echo "Address = $WG_CLIENT_IP/$SUBNET_MASK"
echo "[Peer]"
echo "Endpoint = ...:$WG_LISTEN_PORT"
echo "PublicKey = $WG_LOCAL_PUBKEY"
echo "AllowedIPs = $WG_SUBNET::1/128"
echo "PresharedKey = $WG_PRESHARED_KEY"
echo "AllowedIPs = $WG_SERVER_IP/$HOST_MASK"
echo
echo "2. Use this command to connect"
echo
echo "ssh $USERNAME@$WG_SUBNET::1"
echo "ssh $USERNAME@$WG_SERVER_IP"
echo
echo "NOTICE:"
echo "If you need to change the port or other VPN settings, do it NOW. Edit /usr/local/etc/wireguard/vmh-ssh-vpn.conf"
echo "If you need to change the port or other VPN settings, do it NOW. /usr/local/etc/wireguard/vmh-ssh-vpn.conf"