Setting a shorter lease time is good if you are on a border of an ip range and don’t want to open more ip avail addresses.  The less avail ips you have the tighter your security.   for example …./26 sub mask is 61 available addresses and and /27 is 29 avail addresses.   lets say you have 22 always active ip addresses and 10 roaming ip addresses of which 5 to 7 are onsite at any given time.   having a short ip address lease would there for be good if folks are in and out all day and the ip’s on their phones and laptops could be released after 2 hours instead of 24.           ... View more