This cafe is very convenient for me to get free Wi-Fi and it is called “METRO FREE Wi-Fi”, because it is close to Nishi-Shinjuku metro station. By the way, before users are authorized by the server, users can send ping any destination but aren’t allowed to transfer any TCP/IP packets. It’s to be expected that the provider wants to restrict the unauthorized user to prevent any unexpected and malicious behavior.
Logs of ping and ssh before I start to authorize:
$ ping google.co.jp PING google.co.jp (188.8.131.52): 56 data bytes 64 bytes from 184.108.40.206: icmp_seq=0 ttl=47 time=14.569 ms 64 bytes from 220.127.116.11: icmp_seq=1 ttl=50 time=10.830 ms ^C --- google.co.jp ping statistics --- 3 packets transmitted, 2 packets received, 33.3% packet loss round-trip min/avg/max/stddev = 10.830/12.700/14.569/1.869 ms $ ssh yukun.info ^C # <-- I can't connect the server.