SearXNG: Add limiter config and whitelist monitoring

coreos-config/plays/services/search/docker-compose.yaml

@@ -13,6 +13,7 @@ services:
     volumes:
       - ./settings.yml:/etc/searxng/settings.yml:ro,z
       - ./uwsgi.ini:/etc/searxng/uwsgi.ini:ro,z
+      - ./limiter.toml:/etc/searxng/limiter.toml:ro,z
     labels:
       - "traefik.enable=true"
       - "traefik.http.routers.searxng.rule=Host(`search.tobiasmanske.de`)"

coreos-config/plays/services/search/limiter.toml

@@ -0,0 +1,41 @@
+[real_ip]
+
+# Number of values to trust for X-Forwarded-For.
+
+x_for = 1
+
+# The prefix defines the number of leading bits in an address that are compared
+# to determine whether or not an address is part of a (client) network.
+
+ipv4_prefix = 32
+ipv6_prefix = 48
+
+[botdetection.ip_limit]
+
+# To get unlimited access in a local network, by default link-lokal addresses
+# (networks) are not monitored by the ip_limit
+filter_link_local = false
+
+# activate link_token method in the ip_limit method
+link_token = false
+
+[botdetection.ip_lists]
+
+# In the limiter, the ip_lists method has priority over all other methods -> if
+# an IP is in the pass_ip list, it has unrestricted access and it is also not
+# checked if e.g. the "user agent" suggests a bot (e.g. curl).
+
+block_ip = [
+  # '93.184.216.34',  # IPv4 of example.org
+  # '257.1.1.1',      # invalid IP --> will be ignored, logged in ERROR class
+]
+
+pass_ip = [
+  '65.108.60.208' # Monitoring
+  # '192.168.0.0/16',      # IPv4 private network
+  # 'fe80::/10'            # IPv6 linklocal / wins over botdetection.ip_limit.filter_link_local
+]
+
+# Activate passlist of (hardcoded) IPs from the SearXNG organization,
+# e.g. `check.searx.space`.
+pass_searxng_org = true