158 lines
5 KiB
Bash
Executable file
158 lines
5 KiB
Bash
Executable file
#!/bin/bash
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# Function to prompt for input with a default value
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prompt_input() {
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local prompt=$1
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local default=$2
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read -p "$prompt [$default]: " input
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echo "${input:-$default}"
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}
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# Function to create bridge interface text for additional IP and internal bridges
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create_bridge_text() {
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local ip=$1
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local bridge_id=$2
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local mac_address=$3
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local external_bridge_id=$bridge_id
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local internal_bridge_id=$((bridge_id * 100))
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# WAN bridge configuration with MAC address and public IP
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local bridge_config="
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auto vmbr${external_bridge_id}
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iface vmbr${external_bridge_id} inet static
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address ${ip}
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netmask ${NETMASK}
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bridge_ports none
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bridge_stp off
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bridge_fd 0
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hwaddress ether ${mac_address}
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#WAN ${external_bridge_id}
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"
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# LAN bridge configuration without an IP, as it's for internal network only
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bridge_config+="
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auto vmbr${internal_bridge_id}
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iface vmbr${internal_bridge_id} inet manual
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bridge_ports none
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bridge_stp off
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bridge_fd 0
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#LAN ${internal_bridge_id}
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"
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echo "$bridge_config"
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}
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# Collect inputs
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MAINSERVERIP=$(prompt_input "MAIN_SERVER_IP" "192.168.0.1")
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GATEWAYADDRESS=$(prompt_input "MAIN_SERVER_GATEWAY_ADDRESS" "192.168.0.254")
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NETMASK=$(prompt_input "NETMASK" "255.255.255.0")
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BROADCASTIP=$(prompt_input "BROADCASTIP" "192.168.0.255")
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ADD_IP_ADDRESSES=$(prompt_input "ADDITIONAL_IP_ADDRESSES (comma-separated)" "")
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MAC_ADDRESSES=$(prompt_input "MAC_ADDRESSES for additional IPs (comma-separated)" "")
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NETWORK_INTERFACE=$(prompt_input "NETWORK_INTERFACE" "eth0")
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# Display inputs for confirmation
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echo "---------------------------------------------------------------------"
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echo "You have entered the following configuration:"
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echo "MAIN_SERVER_IP: $MAINSERVERIP"
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echo "MAIN_SERVER_GATEWAY_ADDRESS: $GATEWAYADDRESS"
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echo "NETMASK: $NETMASK"
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echo "BROADCASTIP: $BROADCASTIP"
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echo "ADDITIONAL_IP_ADDRESSES: $ADD_IP_ADDRESSES"
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echo "MAC_ADDRESSES: $MAC_ADDRESSES"
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echo "NETWORK_INTERFACE: $NETWORK_INTERFACE"
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echo "---------------------------------------------------------------------"
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read -p "Is this correct? [yes/no]: " confirmation
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if [[ $confirmation != [Yy]* ]]; then
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echo "Exiting without changes."
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exit
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fi
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# Split ADD_IP_ADDRESSES and MAC_ADDRESSES into arrays
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IFS=',' read -ra ADDR <<<"$ADD_IP_ADDRESSES"
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IFS=',' read -ra MACS <<<"$MAC_ADDRESSES"
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# Generate dynamic routing rules
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additional_routes=""
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for add_ip in "${ADDR[@]}"; do
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additional_routes+=" up ip route add $add_ip dev ${NETWORK_INTERFACE}
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"
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done
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# Initialize the interfaces file content
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interfaces_content="
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### Hetzner Online GmbH installimage
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source /etc/network/interfaces.d/*
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auto lo
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iface lo inet loopback
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iface lo inet6 loopback
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# Main network interface configuration
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iface ${NETWORK_INTERFACE} inet manual
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up ip route add -net ${GATEWAYADDRESS} netmask ${NETMASK} gw ${GATEWAYADDRESS} vmbr0
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up sysctl -w net.ipv4.ip_forward=1
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up sysctl -w net.ipv4.conf.${NETWORK_INTERFACE}.send_redirects=0
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up sysctl -w net.ipv6.conf.all.forwarding=1
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$additional_routes
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up ip route add 192.168.0.0/16 via ${MAINSERVERIP} dev vmbr0
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up ip route add 172.16.0.0/12 via ${MAINSERVERIP} dev vmbr0
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up ip route add 10.0.0.0/8 via ${MAINSERVERIP} dev vmbr0
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auto vmbr0
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iface vmbr0 inet static
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address ${MAINSERVERIP}
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netmask ${NETMASK}
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gateway ${GATEWAYADDRESS}
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broadcast ${BROADCASTIP}
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bridge-ports ${NETWORK_INTERFACE}
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bridge-stp off
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bridge-fd 0
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pointopoint ${GATEWAYADDRESS}
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#Main IP configuration
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"
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# Append bridge interfaces for each additional IP and MAC address and create internal bridges
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for i in "${!ADDR[@]}"; do
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# Increment bridge_id for each additional IP
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bridge_id=$((i + 1))
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interfaces_content+=$(create_bridge_text "${ADDR[i]}" "$bridge_id" "${MACS[i]}")
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done
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# Save the new configuration to a temporary file
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echo "$interfaces_content" > /tmp/new_interfaces
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# Display the current network configuration
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echo "---------------------------------------------------------------------"
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echo "Current network configuration (/etc/network/interfaces):"
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cat /etc/network/interfaces
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echo ""
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# Display the new network configuration
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echo "---------------------------------------------------------------------"
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echo "New network configuration:"
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cat /tmp/new_interfaces
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echo ""
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# Show the differences
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echo "---------------------------------------------------------------------"
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echo "Configuration differences:"
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diff /etc/network/interfaces /tmp/new_interfaces
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echo ""
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# Confirm before applying changes
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echo "---------------------------------------------------------------------"
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read -p "Apply this network configuration? [yes/no]: " apply_conf
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if [[ $apply_conf == [Yy]* ]]; then
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timestamp=$(date +%Y%m%d-%H%M%S)
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mv /etc/network/interfaces /etc/network/interfaces.bak-$timestamp
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mv /tmp/new_interfaces /etc/network/interfaces
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echo "The network can be restarted with the following command: '/etc/init.d/networking' restart or 'systemctl restart networking'"
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else
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echo "Exiting without applying changes."
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rm /tmp/new_interfaces
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fi
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