51 lines
1.3 KiB
Bash
51 lines
1.3 KiB
Bash
#!/bin/bash
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# Share Wifi with Eth device
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#
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#
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# This script is created to work with Raspbian Stretch
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# but it can be used with most of the distributions
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# by making few changes.
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#
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# Make sure you have already installed `dnsmasq`
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# Please modify the variables according to your need
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# Don't forget to change the name of network interface
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# Check them with `ifconfig`
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ip_address="192.168.2.1"
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netmask="255.255.255.0"
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dhcp_range_start="192.168.2.2"
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dhcp_range_end="192.168.2.100"
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dhcp_time="12h"
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eth="eth0"
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wlan="wlan0"
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sudo systemctl start network-online.target &> /dev/null
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sudo iptables -F
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sudo iptables -t nat -F
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sudo iptables -t nat -A POSTROUTING -o $wlan -j MASQUERADE
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sudo iptables -A FORWARD -i $wlan -o $eth -m state --state RELATED,ESTABLISHED -j ACCEPT
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sudo iptables -A FORWARD -i $eth -o $wlan -j ACCEPT
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sudo sh -c "echo 1 > /proc/sys/net/ipv4/ip_forward"
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sudo ifconfig $eth $ip_address netmask $netmask
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# Remove default route created by dhcpcd
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sudo ip route del 0/0 dev $eth &> /dev/null
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sudo systemctl stop dnsmasq
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sudo rm -rf /etc/dnsmasq.d/* &> /dev/null
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echo -e "interface=$eth\n\
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bind-interfaces\n\
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server=176.103.130.130\n\
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domain-needed\n\
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bogus-priv\n\
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dhcp-range=$dhcp_range_start,$dhcp_range_end,$dhcp_time" > /tmp/custom-dnsmasq.conf
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sudo cp /tmp/custom-dnsmasq.conf /etc/dnsmasq.d/custom-dnsmasq.conf
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sudo systemctl start dnsmasq
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