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Check IP forwarding setting

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Kroese 2023-04-29 19:12:02 +02:00 committed by GitHub
parent 859a445ede
commit 18729e0675
1 changed files with 10 additions and 5 deletions
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15
run/network.sh
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@ -33,11 +33,11 @@ configureDHCP() {
ip address add "${IP}" dev "${VM_NET_VLAN}"
ip link set dev "${VM_NET_VLAN}" up
#ip route flush dev "${VM_NET_DEV}"
ip route flush dev "${VM_NET_DEV}"
ip route flush dev "${VM_NET_VLAN}"
ip route add "${IP}" dev "${VM_NET_VLAN}" metric 0
#ip route add default via "${GATEWAY}"
ip route add "${NETWORK}" dev "${VM_NET_VLAN}" metric 0
ip route add default via "${GATEWAY}"
echo "INFO: Acquiring an IP address via DHCP using MAC address ${VM_NET_MAC}..."
@ -130,8 +130,13 @@ configureNAT () {
iptables -A POSTROUTING -t mangle -p udp --dport bootpc -j CHECKSUM --checksum-fill || true
fi
#Enable port forwarding flag
[[ $(< /proc/sys/net/ipv4/ip_forward) -eq 0 ]] && sysctl -w net.ipv4.ip_forward=1
#Check port forwarding flag
if [[ $(< /proc/sys/net/ipv4/ip_forward) -eq 0 ]]; then
if ! sysctl -w net.ipv4.ip_forward=1; then
echo -n "ERROR: IP forwarding is disabled. Please add the following "
echo "docker setting to your container: --sysctl net.ipv4.ip_forward=1" && exit 24
fi
fi
# dnsmasq configuration:
DNSMASQ_OPTS="$DNSMASQ_OPTS --dhcp-range=$VM_NET_IP,$VM_NET_IP --dhcp-host=$VM_NET_MAC,,$VM_NET_IP,$VM_NET_HOST,infinite --dhcp-option=option:netmask,255.255.255.0"