Setting CIDR/IP so anyone can access it from any IP?

amazon-web-services cidr
Matt picture Matt · Jun 16, 2011 · Viewed 55.8k times · Source

How do you set a CIDR/IP so anyone can access it from anywhere? I'm trying to make my AWS RDS DB instance accessible from anywhere as my ISP doesn't give me a static IP. Everytime my IP changes I have to go change the security record.

Answer

russau picture russau · Jun 16, 2011

0.0.0.0/0 does the trick on the EC2 firewall settings

A CIDR defines a range of IP addresses. In the CIDR notation above, /0 is saying "every possible IP".

I like using http://cidr.xyz/ to visualize the range of addresses.

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