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6 changes: 4 additions & 2 deletions cloudformation/lib/api.js
Original file line number Diff line number Diff line change
Expand Up @@ -98,8 +98,8 @@ const Resources = {
Scheme: 'internet-facing',
// Disabled as DualStack currently does not support IPv6 UDP
// ref: https://docs.aws.amazon.com/whitepapers/latest/ipv6-on-aws/scaling-the-dual-stack-network-design-in-aws.html
// EnablePrefixForIpv6SourceNat: 'on',
// IpAddressType: 'dualstack',
EnablePrefixForIpv6SourceNat: 'on',
IpAddressType: 'dualstack',
SecurityGroups: [cf.ref('ELBSecurityGroup')],
LoadBalancerAttributes: [{
Key: 'access_logs.s3.enabled',
Expand Down Expand Up @@ -382,6 +382,8 @@ for (const p of PORTS) {
TargetType: 'ip',
VpcId: cf.importValue(cf.join(['coe-vpc-', cf.ref('Environment'), '-vpc'])),

IpAddressType: 'ipv6',

HealthCheckEnabled: true,
HealthCheckIntervalSeconds: 30,
// UDP Health checks fallback to TCP
Expand Down
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