Network DB Statistics: Network recv/sent RTT Hops Hostnames 61.*.40.0 0/ 2 0.0 0.0 www.a.com 61.*.73.0 0/ 60 0.0 0.0 www.b.com 121.9.*.0 0/ 20 0.0 0.0 121.9.*.78 121.9.*.77 I want use netdb for squid, i have set query_icmp on in squid.conf , why there is no recv from cache peer ?