突然 ping 不通自家 IP 了

RT
0536 联通，默认给公网 IP ，光猫使用 F7607P 移动固件手动配置数据桥接小米万兆路由器拨号上网

在 0531 电信用 Windows ping 提示：
Reply from 39.69.**.**: Destination port unreachable.
Reply from 39.69.**.**: Destination port unreachable.
Reply from 39.69.**.**: Destination port unreachable.
Reply from 39.69.**.**: Destination port unreachable.
Ping statistics for 39.69.**.**:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),

但是可以通过 ssh 连接到端口映射出来的 linux 主机上，在主机上 ping WAN 口 IP 提示：
64 bytes from 39.69.**.** (39.69.**.**): icmp_seq=1 ttl=64 time=0.854 ms
64 bytes from 39.69.**.** (39.69.**.**): icmp_seq=2 ttl=64 time=0.785 ms
64 bytes from 39.69.**.** (39.69.**.**): icmp_seq=3 ttl=64 time=0.837 ms
64 bytes from 39.69.**.** (39.69.**.**): icmp_seq=4 ttl=64 time=0.818 ms
64 bytes from 39.69.**.** (39.69.**.**): icmp_seq=5 ttl=64 time=0.828 ms

5 packets transmitted, 5 received, 0% packet loss, time 4005ms
rtt min/avg/max/mdev = 0.785/0.824/0.854/0.023 ms

是路由器的配置问题还是运营商封了 ping ？