以下環境で利用してるのですが
cat /etc/lsb-release
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=14.04
DISTRIB_CODENAME=trusty
DISTRIB_DESCRIPTION="Ubuntu 14.04.3 LTS"

$ iptables -L
modprobe: ERROR: could not insert 'ip_tables': Operation not permitted
iptables v1.4.21: can't initialize iptables table `filter': Table does not exist (do you need to insmod?)
Perhaps iptables or your kernel needs to be upgraded.
ueda@Server:~$ sudo iptables -L
[sudo] password for ueda:
Chain INPUT (policy ACCEPT)
target     prot opt source               destination         

Chain FORWARD (policy ACCEPT)
target     prot opt source               destination         

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination 

自PC（192.168.1.102)にpingが通りません　どう切り分けるべきか
アドバイス頂ければ幸いです
$ ping 192.168.1.102

--- 192.168.1.102 ping statistics ---
6 packets transmitted, 6 received, 0% packet loss, time 5007ms
rtt min/avg/max/mdev = 4.252/4.313/4.515/0.092 ms
ueda@Server:~$ ping 192.168.1.101
PING 192.168.1.101 (192.168.1.101) 56(84) bytes of data.


同じモバイルルータに継っているPCにはpingが通ります
（プライバシーセパレータは解除されています）
PING 192.168.1.102 (192.168.1.102) 56(84) bytes of data.
64 bytes from 192.168.1.102: icmp_seq=1 ttl=64 time=4.31 ms
64 bytes from 192.168.1.102: icmp_seq=2 ttl=64 time=4.26 ms
64 bytes from 192.168.1.102: icmp_seq=3 ttl=64 time=4.51 ms
64 bytes from 192.168.1.102: icmp_seq=4 ttl=64 time=4.26 ms
64 bytes from 192.168.1.102: icmp_seq=5 ttl=64 time=4.26 ms
64 bytes from 192.168.1.102: icmp_seq=6 ttl=64 time=4.25 ms
^