This repository was archived by the owner on Jul 20, 2024. It is now read-only.
This repository was archived by the owner on Jul 20, 2024. It is now read-only.
Support Amazon Linux 2023 #65
Description
The current snat.sh script doesn't work on Amazon Linux 2023.
Here's my first attempt at an alternative script for Amazon Linux 2023
#!/bin/bash -x
# wait for ens6
while ! ip link show dev ens6; do
sleep 1
done
# NAT Instance Setup
# https://docs.aws.amazon.com/vpc/latest/userguide/VPC_NAT_Instance.html#NATInstance
# enable IP forwarding and NAT on ens6
sysctl -q -w net.ipv4.ip_forward=1
sysctl -q -w net.ipv4.conf.ens6.send_redirects=0
/sbin/iptables -t nat -A POSTROUTING -o ens6 -j MASQUERADE
service iptables save
# switch the default route to ens6
GATEWAY=$(ip route | awk '/default/ { print $3 }')
ip route add $GATEWAY dev ens6
ip route add default via $GATEWAY
ip route del default dev ens5
# wait for network connection
curl --retry 10 http://www.example.com
# re-establish connections
systemctl restart amazon-ssm-agentThere's a couple of areas which could use improvement such as:
- Don't hardcode
ens5andens6 - Persist the routes after a reboot
If there is anyone else interested in having this module work with Amazon Linux 2023 comment here and i'll submit a PR.