What prevents the Great Firewall from whitelisting pings from these machines?

csytan · on May 16, 2010

Nothing, but why would they bother?

swolchok · on May 16, 2010

To interfere with foreign citizens' probing of their network?

gscott · on May 16, 2010

I tried pinging dropbox.com from the justping site and for China they have

Shanghai, China: Packets lost (100%)

Looks like good data, no conspiracies.

th · on May 16, 2010

I tried this as well. The first time Shanghai, China gave 100% packet loss for dropbox.com but every subsequent time I have tried all packets have been delivered.

Pinging facebook.com seems to drop all packets reliably though.