134 lines
4.0 KiB
Bash
134 lines
4.0 KiB
Bash
# Install using: sudo su -c "bash <(wget -qO- /url/to/install-wireguard-server.sh)"
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# Make sure script is ran as root
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if [[ $EUID -ne 0 ]]; then
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exec sudo /bin/bash "$0" "$@"
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fi
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read -e -p "Enter lan NIC: " -i $(ip route | grep default | sed -e 's/^.*dev.//' -e 's/.proto.*//') NIC_NAME
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read -e -p "Enter VPN subnet: " -i "192.168.200" VPN_SUBNET
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read -e -p "Enter LAN subnet: " -i "192.168.0" LAN_SUBNET
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read -e -p "Enter VPN public hostname: " -i "home.myspace.nu" VPN_PUBLIC_HOST
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read -e -p "Allowed destination LAN IPs (empty for all): " -i "${LAN_SUBNET}.1,${LAN_SUBNET}.2" ALLOWED_HOST_IPs
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if [ $(dpkg-query -W -f='${Status}' wireguard 2>/dev/null | grep -c "ok installed") -eq 0 ];
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then
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echo "Installing Wireguard..."
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apt install wireguard -y
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fi
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mkdir -m 0700 /etc/wireguard/ > /dev/null 2>&1
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cd /etc/wireguard/
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if [ ! -f privatekey ]
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then
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echo "Generating private and public keys"
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umask 077; wg genkey | tee privatekey | wg pubkey > publickey
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fi
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SERVER_PRIVATEKEY=$(cat "privatekey")
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SERVER_PUBLICKEY=$(cat "publickey")
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# sudo ufw allow 41194/udp
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if ! grep -q "net.ipv4.ip_forward" "/etc/sysctl.d/10-wireguard.conf"; then
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echo 'net.ipv4.ip_forward=1' | sudo tee -a /etc/sysctl.d/10-wireguard.conf
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echo 'net.ipv6.conf.all.forwarding=1' | sudo tee -a /etc/sysctl.d/10-wireguard.conf
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sysctl -p /etc/sysctl.d/10-wireguard.conf
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fi
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if [ -z "$ALLOWED_HOST_IPs" ]
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then
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POSTUP="$POSTUP""PostUp = iptables -A FORWARD -i %i -d $LAN_SUBNET.0/24 -j ACCEPT
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"
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POSTDOWN="$POSTDOWN""PostDown = iptables -D FORWARD -i %i -d $LAN_SUBNET.0/24 -j ACCEPT
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"
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else
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for i in ${ALLOWED_HOST_IPs//,/ }
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do
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POSTUP="$POSTUP""PostUp = iptables -A FORWARD -i %i -d $i/32 -j ACCEPT
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"
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POSTDOWN="$POSTDOWN""PostDown = iptables -D FORWARD -i %i -d $i/32 -j ACCEPT
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"
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done
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fi
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sudo tee /etc/wireguard/wg0.conf.base > /dev/null <<EOL
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[Interface]
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Address = $VPN_SUBNET.1/24
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ListenPort = 51820
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PrivateKey = ${SERVER_PRIVATEKEY}
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${POSTUP}
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PostUp = iptables -A FORWARD -i %i -d $VPN_SUBNET.0/24 -j ACCEPT
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PostUp = iptables -A FORWARD -i %i -d 0.0.0.0/0 -j DROP
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PostUp = iptables -A FORWARD -o %i -j ACCEPT
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PostUp = iptables -t nat -A POSTROUTING -o ${NIC_NAME,,} -j MASQUERADE
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${POSTDOWN}
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PostDown = iptables -D FORWARD -i %i -d $VPN_SUBNET.0/24 -j ACCEPT
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PostDown = iptables -D FORWARD -i %i -d 0.0.0.0/0 -j DROP
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PostDown = iptables -D FORWARD -o %i -j ACCEPT
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PostDown = iptables -t nat -D POSTROUTING -o ${NIC_NAME,,} -j MASQUERADE
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# [Peer]
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# Client 1
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# PublicKey = ...
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# AllowedIPs = $VPN_SUBNET.2/32
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EOL
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cat /etc/wireguard/wg0.conf.base /etc/wireguard/wg0.conf.clients > /etc/wireguard/wg0.conf
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if ! systemctl is-active --quiet "wg-quick@wg0.service" ; then
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systemctl enable wg-quick@wg0
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systemctl start wg-quick@wg0
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sudo systemctl status wg-quick@wg0
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wg
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ip a show wg0
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fi
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sudo tee /usr/local/bin/wg-adduser.sh > /dev/null <<EOL
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read -e -p "Enter username: " -i "Anonymous" WGCLIENT
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for i in {2..255}; do
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ip="$VPN_SUBNET.\$i"
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if ! grep -q "\$ip" "/etc/wireguard/wg0.conf"; then
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break
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fi
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done
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CLIENT_PRIVATEKEY=\$(wg genkey)
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CLIENT_PUBLICKEY=\$(echo "\$CLIENT_PRIVATEKEY" | wg pubkey)
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SERVER_PUBLICKEY=$(cat "/etc/wireguard/publickey")
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sudo tee /etc/wireguard/client-\$WGCLIENT.conf > /dev/null <<LOE
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# Private key: \$CLIENT_PRIVATEKEY
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# Public key: \$CLIENT_PUBLICKEY
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[Interface]
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PrivateKey = \$CLIENT_PRIVATEKEY
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Address = \$ip/24
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DNS = 1.1.1.1, 8.8.8.8
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[Peer]
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PublicKey = \$SERVER_PUBLICKEY
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# AllowedIPs = 0.0.0.0/0 # Will route all traffic through the VPN
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AllowedIPs = $LAN_SUBNET.0/24, $VPN_SUBNET.0/24
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Endpoint = $VPN_PUBLIC_HOST:51820
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PersistentKeepalive = 25
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LOE
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cat <<LOE >> "/etc/wireguard/wg0.conf.clients"
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[Peer]
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# Client: \$WGCLIENT
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PublicKey = \$CLIENT_PUBLICKEY
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AllowedIPs = \$ip/32
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LOE
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cat /etc/wireguard/wg0.conf.base /etc/wireguard/wg0.conf.clients > /etc/wireguard/wg0.conf
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wg-quick down wg0 && wg-quick up wg0
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printf "\n\n_[ client-\$WGCLIENT.conf ]________________________________________\n"
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cat /etc/wireguard/client-\$WGCLIENT.conf
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EOL
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chmod 777 /usr/local/bin/wg-adduser.sh
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sudo tee /usr/local/bin/wg-restart.sh > /dev/null <<EOL
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wg-quick down wg0 && wg-quick up wg0
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EOL
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chmod 777 /usr/local/bin/wg-restart.sh
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