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add gateway script

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Adrian Amaglio 2022-07-04 16:32:08 +02:00
parent a43f4aea0a
commit a790ca3fc8
1 changed files with 36 additions and 0 deletions
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36
gw.sh Executable file
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#!/bin/bash
. driglibash-base
if [ "$#" -ne 2 ] ; then
yell "Missing 2 parameters"
die "Usage: $0 <local_iface> <net_iface>"
fi
root_or_die
local_iface="$1"
net_iface="$2"
run sysctl net.ipv4.ip_forward=1
clean "sysctl net.ipv4.ip_forward=1"
run nmcli device set "$local_iface" managed no
clean "nmcli device set "$local_iface" managed yes"
run ip a add 192.168.238.254/24 dev "$local_iface"
clean "ip a del 192.168.238.254/24 dev $local_iface"
# For dhcp offers
run iptables -A OUTPUT -d 255.255.255.255/32 -j ACCEPT
run iptables -A OUTPUT -d 192.168.238.0/24 -j ACCEPT
run iptables -A INPUT -s 192.168.238.0/24 -j ACCEPT
run iptables -A INPUT -s 255.255.255.255 -j ACCEPT
run iptables -A INPUT -i "$local_iface" -j ACCEPT
run iptables -t nat -A POSTROUTING -o "$net_iface" -j MASQUERADE
run iptables -A FORWARD -i $net_iface -o $local_iface -m state --state RELATED,ESTABLISHED -j ACCEPT
run iptables -A FORWARD -i $local_iface -o $net_iface -j ACCEPT
run dnsmasq --dhcp-range=192.168.238.100,192.168.238.199,10m -d --server=9.9.9.9
clean