ubuntu 可以 ping 别人,无法从外面 ping 自己

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cd /etc/netplan

vim 1-network-manager-all.yaml

# Let NetworkManager manage all devices on this system
network:
  version: 2
  renderer: NetworkManager
  ethernets:
    enp0s31f6:
     dhcp4: no
     addresses: [192.168.1.88/24]
     gateway4: 192.168.1.1
     nameservers:
       addresses: [114.114.114.114]

sudo netplan apply