As you see after pinging to Ping-o-Matic, the service give a string which is almost unreadable at all. Below is a sample taken when pinged this site.

 It seems to be readable with just a few decryption something like Caesar Cipher. I found that the exact cipher technique being used here is ROT13. The lookup table is just like below.

After applying ROT13, the plaintext is as follow.

I implemented this decryption in Ping-o-Matic Module right now.