Connection limiting (limit_conn) in Nginx - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to set a connection limit zone named 'addr' with 10MB of shared memory.

Nginx

limit_conn_zone $binary_remote_addr zone=addr:[1];

Drag options to blanks, or click blank then click option'

A10m

B5m

C20m

D50m

Attempts:

3 left

💡 Hint

Common Mistakes

Using lowercase 'm' is required, uppercase 'M' causes errors.

Choosing too small or too large memory size can cause configuration issues.

The limit_conn_zone directive requires a zone size, such as 10m for 10 megabytes.

2fill in blank

medium

Complete the code to limit connections per IP address to 5.

Nginx

limit_conn addr [1];

Drag options to blanks, or click blank then click option'

A20

B10

C5

D1

Attempts:

3 left

💡 Hint

Common Mistakes

Setting the limit too high defeats the purpose of limiting.

Setting the limit too low may block legitimate users.

The limit_conn directive sets the maximum number of connections per defined zone. Here, 5 connections per IP.

3fill in blank

hard

Fix the error in the code to correctly limit connections using the zone 'addr'.

Nginx

limit_conn_zone $binary_remote_addr zone=addr:[1];
limit_conn addr 10;

Drag options to blanks, or click blank then click option'

A10

B10mb

C10M

D10m

Attempts:

3 left

💡 Hint

Common Mistakes

Using uppercase 'M' or 'mb' causes syntax errors.

Using a number instead of zone name in limit_conn causes errors.

The zone size must be specified with a lowercase 'm' for megabytes in limit_conn_zone. The limit_conn directive uses the zone name only, here 'addr'.

4fill in blank

hard

Fill both blanks to limit connections per IP to 3 with a 5MB zone named 'client'.

Nginx

limit_conn_zone $binary_remote_addr zone=[1]:[2];
limit_conn client 3;

Drag options to blanks, or click blank then click option'

Aclient

B5m

Caddr

D10m

Attempts:

3 left

💡 Hint

Common Mistakes

Mismatching zone names between directives.

Using incorrect zone size units.

The zone name is 'client' and the zone size is '5m' for 5 megabytes.

5fill in blank

hard

Fill all three blanks to create a connection limit zone 'userip' with 15MB memory and limit connections to 7.

Nginx

limit_conn_zone $binary_remote_addr zone=[1]:[2];
limit_conn [3] 7;

Drag options to blanks, or click blank then click option'

Auserip

B15m

D10m

Attempts:

3 left

💡 Hint

Common Mistakes

Using different zone names in limit_conn_zone and limit_conn.

Incorrect zone size units or values.

The zone name is 'userip', the size is '15m', and the limit_conn uses the same zone name 'userip'.