Mission Tech · Diagnostic
Fault Lab
Something broke. Find where.
You have learned how the stack works. Now break it. Pick a symptom, walk the stack, spot the layer that failed. Three scenarios live. More coming.
Browser
Failure
Server
Failure Scenarios
Scenario 01
Wrong DNS Answer
"You reached the wrong server."
Debug this →
Scenario 02
SYN-ACK Never Arrives
"The server replied. The client never knew."
Coming soon
Scenario 03
NAT State Expired
"The conversation existed. Then the router forgot."
Coming soonScenario 01
Wrong DNS Answer
"You got an answer. Just not the right one."
Network Path
Browser
Resolver
Auth NS
Server
Investigation
Current state
What just happened