[squid-users] Reverse DNS Lookup for client IPs

[Stefan Hölzle]

Hello,

I'm using a squid configured as proxy.
According to the cache log, squid is doing a reverse dns lookup for
client ips:

78,3| dns_internal.cc(1794) idnsPTRLookup: idnsPTRLookup: buf is 42
bytes for SOME_SOURCE_IP

I'm only using the following configuration parameters that might be
relevant for this issue.
external_acl_type
acl aclname src
acl aclname dst
acl aclname dstdom_regex
acl aclname port
acl aclname proxy_auth
acl aclname external
acl aclname url_regex

Any ideas why squid is doing PTR lookups anyway ?