Stefan Krusche wrote:
$ ping mirror.xcer.cz PING mirror.xcer.cz (91.241.23.210) 56(84) bytes of data. From 10.2.252.114 icmp_seq=2 Destination Host Unreachable
Here from Berlin, Germany. However, "10.2.252.114" looks suspicious to me, because netrange 10.0.0.0 - 10.255.255.255 is a private address usually used by internal networks of big company IIUC, i.e. my provider. When I ping the Freie Universität Berlin, I get this:
10.2.252.114 must be your address from which the ping is executed