这可能是由于未在AMI中打开所需的端口或配置安全组而导致。在启动AMI的实例中，您需要检查安全组设置和部署应用程序的端口配置。

以下是一个Python脚本示例，用于创建EC2实例，并在启动实例后更新安全组以允许入站SSH流量：

import boto3

# Set the region
region = 'us-west-2'

# Set the AMI ID and instance type
ami_id = 'ami-0323c3dd2da7fb37d' # Example AMI ID
instance_type = 't2.micro'

# Set the key pair name and SSH key file path
key_pair_name = 'example_key_pair'
ssh_key_path = 'path/to/example_key_pair.pem'

# Set the security group name and port number
security_group_name = 'example_security_group'
port_number = 22

ec2 = boto3.resource('ec2', region_name=region)

# Create a security group
security_group = ec2.create_security_group(
    GroupName=security_group_name,
    Description='Example security group'
)

# Authorize inbound SSH traffic
security_group.authorize_ingress(
    IpProtocol='tcp',
    FromPort=port_number,
    ToPort=port_number,
    CidrIp='0.0.0.0/0'
)

# Start the instance
instance = ec2.create_instances(
    ImageId=ami_id,
    InstanceType=instance_type,
    KeyName=key_pair_name,
    MinCount=1,
    MaxCount=1,
    SecurityGroups=[security_group_name]
)[0]

instance.wait_until_running()

print(f'Instance {instance.id} is now running.')

# Update the security group to allow inbound SSH traffic
security_group.authorize_ingress(
    IpProtocol='tcp',
    FromPort=port_number,
    ToPort=port_number,
    CidrIp='0.0.0.0/0'
)

print(f'Inbound SSH traffic is now allowed for security group {security_group.group_name}.')

请注意，这是一个简