hack3rs.ca network-security
/401/ :: http-status::401

root@hack3rs:/srv/www$ curl -i /401/

HTTP/1.1 401 Unauthorized

Authentication is required or the provided credentials were rejected.

status-summary.log
HTTP 401 Unauthorized

The resource may be available, but the request needs valid authentication credentials or a fresh session/token.

Confirm identity provider status, token validity, and clock synchronization before assuming an application failure.

likely-causes.lst
  • $Missing Authorization header or expired session cookie.
  • $Invalid API token, revoked credentials, or MFA/session challenge failure.
  • $System clock skew causing token validation to fail.
  • $Auth proxy or upstream identity provider outage.
recovery-steps.md
  1. Sign in again and obtain a fresh token/session.
  2. Verify token audience, issuer, and expiration claims.
  3. Check IdP, SSO, or auth gateway health and logs.
  4. Confirm the account is authorized for the target environment.
quick-actions.sh
open / Return to the home terminal open /learning Browse structured learning modules open /errors View the full HTTP error reference open /contact Report a broken link or page issue
ops-note.txt

Use these pages for debugging and user guidance. In production, configure your host or reverse proxy to return the matching HTTP status code for the route (especially for 401 and 404/500 responses) rather than serving a 200 with error-themed content.