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| NULL | "packets_limit_per_flow" | 32 | 0 | 255 | The upper limit on the number of packets per flow that will be subject to DPI, after which classification will be considered complete (0 = no limit) |
| NULL | "filename.config" | NULL | NULL | NULL | Name of the file containing a list of configuration knobs itself (one per line)!. Useful to configure nDPI via text file instead of via API |
| "tls" | "metadata.sha1_fingerprint.enable" | 1 | NULL | NULL | Enable/disable computation and export of SHA1 fingerprint for TLS flows. Note that if it is disable, the flow risk `NDPI_MALICIOUS_SHA1_CERTIFICATE` is not checked |
+| NULL | "lru.$CACHE_NAME.size" | See description | 0 | 16777215 | Set the size (in number of elements) of the specified LRU cache (0 = the cache is disabled). The keyword "$CACHE_NAME" is a placeholder for the cache name and the possible values are: ookla, bittorrent, zoom, stun, tls_cert, mining, msteams, stun_zoom. The default value is "32768" for the bittorrent cache, "512" for the zoom cache and "1024" for all the other caches |
+| NULL | "lru.$CACHE_NAME.ttl" | See description | 0 | 16777215 | Set the TTL (in seconds) for the elements of the specified LRU cache (0 = the elements never explicitly expire). The keyword "$CACHE_NAME" is a placeholder for the cache name and the possible values are: ookla, bittorrent, zoom, stun, tls_cert, mining, msteams, stun_zoom. The default value is "120" for the ookla cache, "60" for the msteams and stun_zoom caches and "0" for all the other caches |