I have to chime in on the "Reverse DNS Lookup for client IPs" thread back in Feb 2016. I tried redefining the logging format for url_rewrite_extras and store_id_extras in the config, but that wouldn't work. I had to change the file src/cf.data.pre and recompiled, after that the number of reverse lookups dropped considerably. -- Ralf Hildebrandt Charite Universitätsmedizin Berlin ralf.hildebrandt@xxxxxxxxxx Campus Benjamin Franklin https://www.charite.de Hindenburgdamm 30, 12203 Berlin Geschäftsbereich IT, Abt. Netzwerk fon: +49-30-450.570.155 _______________________________________________ squid-users mailing list squid-users@xxxxxxxxxxxxxxxxxxxxx http://lists.squid-cache.org/listinfo/squid-users