d8a09277_e_DNS_lookups_on_Web_Site_Logs__Description
[Option] -m timeout [Description] 
Specifies the base timeout value for a lookup. If a lookup fails, the timeout value is doubled, up to a maximum of 60 secs, on the next and subsequent attempts. Works in conjunction with the -y switch. Default base timeout is 4 secs.
RDNSLOGS - Performs Reverse DNS lookups on Web Site Logs
Description