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HCL Foundations

terraform block required_providers provider configuration resource block data source input variable local values output value

Expressions

for expression conditional expression splat expression dynamic block count for_each depends_on lifecycle block

State and Modules

backend configuration remote state data source module block module outputs moved block import block terraform workspace state locking concept

Production Infrastructure

aws_vpc resource aws_subnet resource security group rules aws_instance resource templatefile function sensitive variable validation block precondition

Terraform / Production Infrastructure

security group rules

Learn security group rules in Terraform through a focused explanation, a topic-specific example, an engineering warning, and a mastery check.

12 min read • Advanced

terraform-027.tf

hcl

resource "aws_security_group" "web" { vpc_id=aws_vpc.main.id ingress { from_port=443 to_port=443 protocol="tcp" cidr_blocks=["0.0.0.0/0"] } }

What to watch

Content source & attribution

Original Syntaxis Content · Original Syntaxis Content

Lesson quizzes

security group rules Mastery Check →

aws_subnet resource

aws_instance resource