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Terraform was previously free software available under version 2.0 of the Mozilla Public License (MPL). On August 10, 2023, HashiCorp announced that all products produced by the company would be relicensed under the Business Source License (BUSL), with HashiCorp prohibiting commercial use of the community edition by those who offer "competitive services".
EDNS Client Subnet (ECS) is an option in the Extension Mechanisms for DNS that allows a recursive DNS resolver to specify the subnetwork for the host or client on whose behalf it is making a DNS query.
The name is a possible reference to U.S. Routes, [1] and "53" is a reference to the TCP/UDP port 53, where DNS server requests are addressed. [2] Route 53 allows users to reach AWS services and non-AWS infrastructure and to monitor the health of their application and its endpoints. Route 53's servers are distributed throughout the world.
This means that 256 /8 address blocks fit into the entire IPv4 space. As IPv4 address exhaustion has advanced to its final stages, some organizations, such as Stanford University, formerly using 36.0.0.0 / 8, have returned their allocated blocks (in this case to APNIC) to assist in the delay of the exhaustion date.
The number of available subnets is 2 n, where n is the number of bits used for the network portion of the address. There is an exception to this rule for 31-bit subnet masks, [ 11 ] which means the host identifier is only one bit long for two permissible addresses.
They usually use port numbers that match the services of the corresponding TCP or UDP implementation, if they exist. The Internet Assigned Numbers Authority (IANA) is responsible for maintaining the official assignments of port numbers for specific uses, [ 1 ] However, many unofficial uses of both well-known and registered port numbers occur in ...
This connection allows the user to “interact with Amazon EC2 instances within a VPC as if they were within [the user's] existing network.” [7] Users are also able to route traffic from one VPC to another VPC using private IP addresses and can communicate as if they were on the same network.
These groups, commonly called CIDR blocks, share an initial sequence of bits in the binary representation of their IP addresses. IPv4 CIDR blocks are identified using a syntax similar to that of IPv4 addresses: a dotted-decimal address, followed by a slash, then a number from 0 to 32, i.e., a.b.c.d / n. The dotted decimal portion is the IPv4 ...