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NLB for Instances in Private Subnet

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I am trying to place two instances in private subnets in two different AZs, and put NLB in public subnets and allow NLB to work for private instances. I notice NLB doesn't have SGs tied to them and my instances have an allow all SG on them. The health checks fail on the TGs and I cant seem to figure out why. Is there a trick to this? I also have NAT gateways in each Private subnet with EIPs attached to them.

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Networking e distribuzione di contenuti
Tag
Equilibratore di carico elastico
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English
stevenjwilliams0728
posta 2 anni fa973 visualizzazioni
3 Risposte
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My SGs on my instances are completely wide open. Do I even need NAT Gateways?

stevenjwilliams0728
con risposta 2 anni fa
  • Tushar_J ESPERTO
    2 anni fa

    You would need NAT gateways only if you need connectivity to the internet from instances in private subnets.

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Have you checked the NACLs also as mentioned here

Also what TCP/UDP port your application is running on? Perhaps check if that application is running, for example if the target is a Linux instance run netstat -an | grep <Port number>

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ESPERTO
Tushar_J
con risposta 2 anni fa
0

Hi - I think a similar discussions and pointers here may help you. https://repost.aws/questions/QUuueXAi20QuisbkOhinnbzQ/aws-nlb-security-group

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ESPERTO
AWS-User-Nitin
con risposta 2 anni fa

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