Index

DevOps · Firewalls: stateful against stateless

The two gates

Your packet passed both gates on the way in. Does the answer get back out?

One packet has to get past two gates: a gate on the machine that remembers who it let in, and a numbered list on the street that remembers nothing. Untick a rule on either sheet and the verdict updates at once. Watch the reply fail at a gate the request sailed through.

Board: Security - SG vs NACL →

Nothing plays automatically. Toggle a rule, reorder one or change a setting, and the verdict below updates.

try this Open The reply nobody wrote a rule for, then untick rules on either sheet and read the hops under The packet.

Included with a plan

This lab is included with a plan. The first three lessons of every track are free, with their boards and videos. A plan unlocks every lesson, board, video, lab and paper for one price.

View plans →Already a member? Sign in