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servewaf always answers rproxy well within its time limit (closes #182 )

A question waits on GeoJS at most 800ms, the new default of
SWWAF_LOOKUP_TIMEOUT. It does not wait at all when the checks will refuse
it whatever GeoJS answers. Just before the Core Rule Set, servewaf refuses
more than 50 cookies or 100 header fields with 431.

Shared default changed: SWWAF_LOOKUP_TIMEOUT also applies to smallwebwaf
with no command.
Judgement call: SWWAF_REPUTATION_TIMEOUT stays 2s, since no request waits
on the DNS blocklists or AbuseIPDB.

Model: opus-5-5

2026-11-05 03:15:00 +00:00

3.4 KiB

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The metrics

What GET /_smallwebwaf/metrics answers with. "Metrics endpoint" in SPEC.md describes the endpoint. 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. servewaf's header limits have no setting, so it leaves them out;
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.

`servewaf`

smallwebwaf servewaf counts a denied request at its decision. It counts an allowed request when its report comes, with the status, bytes and times the report gives. These are not counted:

a report itself;
an allowed request whose report never comes;
a question refused with 400;
a question whose body stopped arriving.

3.4 KiB Raw Blame History