Cache Servers can help but at time they can change the lay of the land for web developers
IP address: 18.104.22.168
Host name: ycar2.mobile.re3.yahoo.com
I get allot of traffic from the above mobile network.
I haven't looked up things to see what it is really about.
Could be a simple mobile application using yahoo search.
But each time this network pops up I get no referral or useragent.
I hope who created the application will fix these issues.
Found some information:
So it's a Caching Server (Service) for Yahoo.
It would be nice if they would identify themselves.
If you use Yahoo Speed Accelerator and find yourself banned one day turn it off to access the site and submit a removal request. Most traffic without useragent is related to spam, botnets and zombie machines.