diff options
| -rwxr-xr-x | dhcp-server.sh | 25 |
1 files changed, 13 insertions, 12 deletions
diff --git a/dhcp-server.sh b/dhcp-server.sh index b6f6487..bc0cdb6 100755 --- a/dhcp-server.sh +++ b/dhcp-server.sh @@ -2,23 +2,24 @@ # Turn ethernet cable into DHCP device set -xeuo pipefail -DEVICE='ens9' -INTERNET='wlp3s0' -ROUTERIP='192.168.123.1' +BRIDGE_INTERFACE='ens9' +INTERNET_INTERFACE='wlp3s0' +SUBNET='192.168.2' +ROUTERIP="$SUBNET.1" echo 'Restarting Device' -ip link set "$DEVICE" down -ip link set "$DEVICE" up +ip link set "$BRIDGE_INTERFACE" down +ip link set "$BRIDGE_INTERFACE" up # Check if ip already assigned -if [ -z "$(ip a | grep -A 5 ens9 | grep 192.168.123.1)" ]; then - ip addr add "$ROUTERIP"/24 dev "$DEVICE" # arbitrary address +if [ -z "$(ip a | grep -A 5 ens9 | grep $ROUTERIP)" ]; then + ip addr add "$ROUTERIP"/24 dev "$BRIDGE_INTERFACE" # arbitrary address fi echo 'Allowing ip forwarding/enabling Nat' sysctl net.ipv4.ip_forward=1 -iptables -t nat -A POSTROUTING -o "$INTERNET" -j MASQUERADE +iptables -t nat -A POSTROUTING -o "$INTERNET_INTERFACE" -j MASQUERADE iptables -A FORWARD -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT -iptables -A FORWARD -i "$DEVICE" -o "$INTERNET" -j ACCEPT +iptables -A FORWARD -i "$BRIDGE_INTERFACE" -o "$INTERNET_INTERFACE" -j ACCEPT echo 'Creating /etc/dhcpd.conf file' #Config file: /etc/dhcpd.conf @@ -26,12 +27,12 @@ cat > /etc/dhcpd.conf <<- EOM option domain-name-servers 8.8.8.8, 8.8.4.4; option subnet-mask 255.255.255.0; option routers $ROUTERIP; -subnet 192.168.123.0 netmask 255.255.255.0 { - range 192.168.123.150 192.168.123.250; +subnet $SUBNET.0 netmask 255.255.255.0 { + range $SUBNET.2 $SUBNET.250; } EOM #Database file: /var/lib/dhcp/dhcpd.leases # cat this to see if a device has been assigned a lease #PID file: /var/run/dhcpd.pid pkill dhcpd || true -dhcpd $DEVICE +dhcpd $BRIDGE_INTERFACE |