diff --git a/aws/mysql/mysql.tf b/aws/mysql/mysql.tf
index 666caa7..53ee894 100644
--- a/aws/mysql/mysql.tf
+++ b/aws/mysql/mysql.tf
@@ -117,18 +117,6 @@ resource "aws_security_group_rule" "db_ingress" {
   source_security_group_id = each.value
 }
 
-resource "aws_security_group_rule" "db_egress" {
-  for_each = toset(var.allow_security_group_ids)
-
-  security_group_id = aws_security_group.database.id
-  description = "Egress from mysql"
-  type = "egress"
-  protocol = "tcp"
-  from_port = 0
-  to_port = 0
-  source_security_group_id = each.value
-}
-
 resource "aws_security_group_rule" "egress_to_db" {
   for_each = toset(var.allow_security_group_ids)
 
@@ -141,18 +129,6 @@ resource "aws_security_group_rule" "egress_to_db" {
   source_security_group_id = aws_security_group.database.id
 }
 
-resource "aws_security_group_rule" "ingress_from_db" {
-  for_each = toset(var.allow_security_group_ids)
-
-  security_group_id = each.value
-  description = "Ingress from mysql"
-  type = "ingress"
-  protocol = "tcp"
-  from_port = 0
-  to_port = 0
-  source_security_group_id = aws_security_group.database.id
-}
-
 resource "random_password" "database" {
   length = 20
   special = true
diff --git a/aws/postgresql/postgresql.tf b/aws/postgresql/postgresql.tf
index 3320de5..19b2d0f 100644
--- a/aws/postgresql/postgresql.tf
+++ b/aws/postgresql/postgresql.tf
@@ -117,18 +117,6 @@ resource "aws_security_group_rule" "db_ingress" {
   source_security_group_id = each.value
 }
 
-resource "aws_security_group_rule" "db_egress" {
-  for_each = toset(var.allow_security_group_ids)
-
-  security_group_id = aws_security_group.database.id
-  description = "Egress from PostgreSQL"
-  type = "egress"
-  protocol = "tcp"
-  from_port = 0
-  to_port = 0
-  source_security_group_id = each.value
-}
-
 resource "aws_security_group_rule" "egress_to_db" {
   for_each = toset(var.allow_security_group_ids)
 
@@ -141,18 +129,6 @@ resource "aws_security_group_rule" "egress_to_db" {
   source_security_group_id = aws_security_group.database.id
 }
 
-resource "aws_security_group_rule" "ingress_from_db" {
-  for_each = toset(var.allow_security_group_ids)
-
-  security_group_id = each.value
-  description = "Ingress from PostgreSQL"
-  type = "ingress"
-  protocol = "tcp"
-  from_port = 0
-  to_port = 0
-  source_security_group_id = aws_security_group.database.id
-}
-
 resource "random_password" "database" {
   length = 20
   special = true
diff --git a/aws/redis/redis.tf b/aws/redis/redis.tf
index 075863d..a6bfbfa 100644
--- a/aws/redis/redis.tf
+++ b/aws/redis/redis.tf
@@ -82,18 +82,6 @@ resource "aws_security_group_rule" "redis_ingress" {
   source_security_group_id = each.value
 }
 
-resource "aws_security_group_rule" "redis_egress" {
-  for_each = toset(var.allow_security_group_ids)
-
-  security_group_id = aws_security_group.redis.id
-  description = "Egress from redis"
-  type = "egress"
-  protocol = "tcp"
-  from_port = 0
-  to_port = 0
-  source_security_group_id = each.value
-}
-
 resource "aws_security_group_rule" "egress_to_redis" {
   for_each = toset(var.allow_security_group_ids)
 
@@ -106,18 +94,6 @@ resource "aws_security_group_rule" "egress_to_redis" {
   source_security_group_id = aws_security_group.redis.id
 }
 
-resource "aws_security_group_rule" "ingress_from_redis" {
-  for_each = toset(var.allow_security_group_ids)
-
-  security_group_id = each.value
-  description = "Ingress from redis"
-  type = "ingress"
-  protocol = "tcp"
-  from_port = 0
-  to_port = 0
-  source_security_group_id = aws_security_group.redis.id
-}
-
 output "host" {
   value = aws_elasticache_cluster.redis.cache_nodes.0.address
 }