IP Addresses Changed to Hostnames in IPTables

[slow_speed@xxxxxxx]

I created a ruleset in iptables and it was saved in 
/etc/iptables.up.rules as expected.  However, when viewing the file, all 
IP addresses had been translated to hostnames.

Why would it ever do such a thing, when I had entered them as IP 
addresses and they would have to be converted to IP addresses anyway?