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SPEC: false statements fixed, repeats removed, dropped requirements restored

The bounds sentence, the blocklist URL sentence, the deny list sentence,
the limit action's scope and the observe mode sentence now say what the
code does. Each of the twenty-one requirements the fourth review found
twice is stated once, with a link from the other place. The request id
header, redirect_uri's case, change 4's reason and the live archive's
InRelease files are back. The biased thresholds are defined where they
are introduced. The docs files apply the fifth README review's findings
and stay identical to the README branch.

Model: fable-5-1

2026-10-22 22:35:29 +00:00

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The metrics

The metrics GET /_smallwebwaf/metrics answers with, as "Metrics endpoint" in SPEC.md describes it. Prometheus keeps the instance label as exported_instance unless the scrape sets honor_labels: true.

Traffic

smallwebwaf_requests_total, smallwebwaf_request_bytes_total and smallwebwaf_response_bytes_total, by status_class such as 2xx and by action;
smallwebwaf_request_duration_seconds and smallwebwaf_upstream_duration_seconds, as histograms;
smallwebwaf_requests_in_flight.

Limits and bans

smallwebwaf_rate_limit_hits_total, by window and by kind (requests, bytes or refusals);
smallwebwaf_size_and_time_limit_hits_total, by limit, the setting passed;
smallwebwaf_offences_total, by kind;
smallwebwaf_bans_made_total, by cause;
smallwebwaf_active_bans and smallwebwaf_permanent_bans.

Attack detection

smallwebwaf_rule_matches_total, by rule_id and action, and smallwebwaf_rules_loaded;
smallwebwaf_waf_matches_total, by mode and rule_id, for the rules that fired.

Countries and AS numbers

For the SWWAF_METRICS_TOP_N busiest of each, the rest as other:

smallwebwaf_country_requests_total, smallwebwaf_country_request_bytes_total, smallwebwaf_country_response_bytes_total and smallwebwaf_country_list_refusals_total, by country;
smallwebwaf_asn_requests_total, smallwebwaf_asn_request_bytes_total and smallwebwaf_asn_response_bytes_total, by asn.

Lookups

smallwebwaf_geojs_requests_total and smallwebwaf_geojs_failures_total;
smallwebwaf_geojs_unanswered_total: the requests that needed an answer and went on without it;
with the file source, smallwebwaf_lookup_database_last_read_timestamp_seconds and smallwebwaf_lookup_database_read_failures_total.

Reputation sources

By source: each list's URL, each zone, and abuseipdb:

smallwebwaf_reputation_hits_total, smallwebwaf_reputation_queries_total and smallwebwaf_reputation_failures_total;
smallwebwaf_reputation_last_fetch_timestamp_seconds, for a list;
smallwebwaf_reputation_daily_budget_remaining, for AbuseIPDB.

State files

By file:

smallwebwaf_state_file_writes_total, smallwebwaf_state_file_write_failures_total, smallwebwaf_state_file_last_write_timestamp_seconds and smallwebwaf_state_file_size_bytes;
smallwebwaf_state_file_edits_taken_in_total and smallwebwaf_state_file_edits_set_aside_total;
smallwebwaf_tracked_clients: the clients in the table.

Remote log, alerts and the process

while a syslog server is set, smallwebwaf_remote_log_lines_sent_total, smallwebwaf_remote_log_lines_dropped_total and smallwebwaf_remote_log_buffer_depth;
by destination, smallwebwaf_alerts_sent_total, smallwebwaf_alerts_failed_total, smallwebwaf_alerts_suppressed_total and smallwebwaf_alerts_dropped_total;
Go's own go_ metrics and the process's process_ metrics.

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