I just ran PingPlotter Freeware to look at packet loss & delays, and got a firewall warning from Eset Smart Security (Ver 126.96.36.199) "Detected covert channel exploit in ICMP packet" The message is inexplicit & doesn't give enough info. I can kind of guess that this suggests info might be being smuggled off my PC to - where - ? would it go to the ping target, or could it be set up with a spoof return address or the like to go somewhere else. Should I worry about it ? Should I stop using the app ? What exactly was in the covert channel, and if it was magically being sent off somewhere, where was it going ?