Not sure what this means

Question

I'm still new to Sopho's so when I come across things I don't understand, I need to ask: Seeing this in my web filtering log today and not sure why now. 
 
 2017:11:30-12:08:46 firewall httpproxy[7038]: id="0003" severity="info" sys="SecureWeb" sub="http" request="0x8d77000" function="check_loopback" file="dns.c" line="1093" message="Connections to 127.0.0.0/8 prohibited" 
 
 Any help for me to learn is greatly appreciated!! 
 
 Thanks. 
 
 Donnie

DouglasFoster · Answer

Are you using Standard proxy? I do not think you could send a 127.x.x.x address through URN any other way. It is blocking an attempt to make it proxy connect to itself, right? 
 Seems,like a good reason to check the source up for malware.