AWS RDS 使用动态 IP 保持用户访问

Question

在 AWS rds 上，我添加了几个 postgres 用户。有 Security groups 需要 IP 地址才能访问数据库实例吗？

所以如果用户有静态 IP 地址，那么我会添加一次，没有问题。

但是如果用户有动态地址，我看到的唯一方法是定期更新 IP 以保持用户有效连接。

我的问题是：是否可以在不手动更新安全组数据的情况下保持动态IP用户的有效连接？

谢谢！

Answer 1

以下是一些选项；

Connect Ec2 using bastion host.
如果用户使用办公室 network/VPN 和固定 私有 IP CIDR 进行连接，则允许入站用于 安全组 中的 IP CIDR。注意：* 这可能会打开对您组织的更广泛专用网络的访问。 RDS 将在本地可用，前提是您从您的组织专用网络获得 AWS VPC 连接。

Answer 2

基于 @amitd's 答案，您可以而且应该使用堡垒主机，但是您仍然需要为您的动态 IP 打开该主机。要将允许访问该主机的 IP 地址更新为我分配的 IP，我使用以下脚本

#! /bin/bash

# This script makes it easier to maintain security groups that allow SSH access
# from a computer with a dynamic IP, such as a computer on a home network or ISP.
#
# Using the script will allow you to SSH to an EC2 without having to allow
# access to the whole world (0.0.0.0/0). If you run this script whenever your IP
# changes then the security groups in your account specified by your AWS profile
# will be updated.
#
# The script will find any security groups for your current profile that are
# tagged with a Tag with a Key of "ssh-from-my-ip" and a case insensitive value
# of "true" or "yes".
#
# For each security group found it will revoke any existing tcp ingress on
# port 22 and authorize ingress on port 22 for your current IP.
#
# Dependencies - AWS CLI and jq


# need my current ip
MY_IP=$(curl --silent https://checkip.amazonaws.com)
echo "Your IP is ${MY_IP}"

# need security group id(s) and existing CIDR for the SG
pairs=$(aws ec2 describe-security-groups | aws ec2 describe-security-groups | jq -c '.SecurityGroups[]? | select( (.Tags[]? | select(.Key == "ssh-from-my-ip") | .Value | test("true|yes"; "i"))) | if .IpPermissions | length == 0 then {sg: .GroupId, cidr: null } else {sg: .GroupId, cidr: .IpPermissions[].IpRanges[].CidrIp} end')

for p in $pairs
do
  SG=$(echo "$p" | jq -r '.sg')
  OLD_CIDR=$(echo "$p" | jq -r '.cidr')

  echo "Updating security group ${SG}"
  if [[ $OLD_CIDR != 'null' ]]
  then
    echo "Revoking ingress permission for ${OLD_CIDR} in security group ${SG}"
    # remove the existing ingress permission
    aws ec2 revoke-security-group-ingress \
        --group-id "${SG}" \
        --protocol tcp \
        --port 22 \
        --cidr "${OLD_CIDR}"
  fi

  # authorize my new IP CIDR
  NEW_CIDR="${MY_IP}"/32
  echo "Authorizing ingress permission for ${NEW_CIDR} in security group ${SG}"
  aws ec2 authorize-security-group-ingress --group-id "${SG}" --ip-permissions '[{"IpProtocol": "tcp", "FromPort": 22, "ToPort": 22, "IpRanges": [{"CidrIp": "'"${NEW_CIDR}"'", "Description": "Rule0"}]}]'
done

AWS RDS 使用动态 IP 保持用户访问

AWS RDS keep user access with dynamic IP

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ip

amazon-rds

aws-security-group