Hi Puttygutt,

Thanks for writing into the forum!

This is a classic presentation for their being a firewall close to your computer. This might be a local firewall or a firewall on your network that is forwarding ICMP packets with a TTL=0 but is blocking the return echo requests. Here is an article that goes into more detail.

If you have any further questions let me know, I'm happy to help!

-Poe