Unable to conenct EC2 priavte instance if Network ACL is enabled

Discussion in 'Masters Program - Customers only' started by arun_4698, Aug 9, 2017.

  1. arun_4698

    arun_4698 Member

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    I have created one VPC with public and private subnets. in addition , NAT instance is created to provide outbound internet traffic for private instance. The Public linux instance is able to connect to internet. However , if i associate the private instance to Network ACL , unable to conenct through public instance.

    If i de-associate the private instance from Network ACL , the private instance is able to connect to internet through the set NAT instance.

    My network ACL does not have any rules set other than default allow/deny rules(Enclosed screenshot)

    Could you help me to understand why the ACL 's are blocking the connectivity to Private instance and why ?

    Thanks in advance.
    upload_2017-8-9_14-37-6.png
    upload_2017-8-9_14-37-24.png

    Arun
     
    #1
  2. Akansha Chaurasia

    Akansha Chaurasia Well-Known Member
    Simplilearn Support

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    Can you check with Windows firewall turn it off then check whether it is working.
     
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