On Fri, Apr 20, 2018 at 12:50:16PM +0200, Francois Gouget wrote: > Indeed I cannot ping their DNS server (210.143.111.171) but I just > thought they blocked ICMP. However I noticed I can in fact ping it from > another host so I did a traceroute and the packets get blocked at the > penultimate hop:
That sounds like their Internet Service Provider may have blocked packets from your subnet due to a denial of service attack, or spam, or similar perceived malicious acts. Or, it could be an accidental misconfiguration of a router. (Theirs, not yours.)
