https://repost.aws/questions/QUtheNp29LQyGHQL41hGCVTA/unable-to-install-openswan-amzon-linux-2023

• fedora.repo

vim /etc/yum.repos.d/fedora.repo

sudo dnf --enablerepo=fedora install libreswan -y

# Libreswan EC2의 공인 IP
export LEFT_PUBLIC_IP=$(aws ec2 describe-instances \\
    --filters "Name=tag:Name,Values=onprem-server" "Name=instance-state-name,Values=running" \\
    --query 'Reservations[0].Instances[0].PublicIpAddress' \\
    --output text)

export LEFT_PUBLIC_IP_2=$LEFT_PUBLIC_IP

export LEFT_SUBNET="10.10.0.0/16"   # 온프레미스 VPC 서브넷

# VPN connection id
export VPN_CONNECTION_ID=$(aws ec2 describe-vpn-connections \\
    --filters "Name=tag:Name,Values=onprem-to-cloud-vpn" "Name=state,Values=available" \\
    --query 'VpnConnections[0].VpnConnectionId' \\
    --output text)

# AWS VPN Gateway의 공인 IP
export RIGHT_PUBLIC_IP=$(aws ec2 describe-vpn-connections \\
    --vpn-connection-ids ${VPN_CONNECTION_ID} \\
    --query 'VpnConnections[0].VgwTelemetry[0].OutsideIpAddress' \\
    --output text)

export RIGHT_PUBLIC_IP_2=$(aws ec2 describe-vpn-connections \\
    --vpn-connection-ids ${VPN_CONNECTION_ID} \\
    --query 'VpnConnections[0].VgwTelemetry[1].OutsideIpAddress' \\
    --output text)

export RIGHT_SUBNET="10.20.0.0/16" # Cloud VPC 서브넷