我已經對防火牆進行設置了，但是我掃描端口時還是發現沒有打開，這令我很困惑（我也嘗試了關閉防火牆，發現掃描本地迴環是正常的，但是掃描外部時還是沒有打開，不能訪問）
```
➜ ~ nmap 127.0.0.1
Starting Nmap 7.94 ( https://nmap.org ) at 2023-05-27 23:02 CST
Nmap scan report for kubernetes.docker.internal (127.0.0.1)
Host is up (0.00039s latency).
Not shown: 996 closed tcp ports (conn-refused)
PORT STATE SERVICE
22/tcp open ssh
631/tcp open ipp
9090/tcp open zeus-admin
9091/tcp open xmltec-xmlmail
Nmap done: 1 IP address (1 host up) scanned in 0.17 seconds
➜ ~ ifconfig
bond_0(eno1&lo): flags=5187<UP,BROADCAST,RUNNING,MASTER,MULTICAST> mtu 1500
inet 192.168.110.4 netmask 255.255.255.0 broadcast 192.168.110.255
inet6 fd::1a87:f309:d35f:859a prefixlen 64 scopeid 0x0<global>
inet6 fd::462f prefixlen 128 scopeid 0x0<global>
inet6 fe80::9d92:2299:90fb:4818 prefixlen 64 scopeid 0x20<link>
ether ce:f1:2a:1e:fb:87 txqueuelen 1000 (Ethernet)
RX packets 79010 bytes 84758837 (80.8 MiB)
RX errors 0 dropped 11 overruns 0 frame 0
TX packets 58846 bytes 11665014 (11.1 MiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
eno1: flags=6211<UP,BROADCAST,RUNNING,SLAVE,MULTICAST> mtu 1500
ether ce:f1:2a:1e:fb:87 txqueuelen 1000 (Ethernet)
RX packets 146702 bytes 153069620 (145.9 MiB)
RX errors 0 dropped 17 overruns 0 frame 0
TX packets 111048 bytes 19603996 (18.6 MiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
device interrupt 16 memory 0xb3280000-b32a0000
lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
inet 127.0.0.1 netmask 255.0.0.0
inet6 ::1 prefixlen 128 scopeid 0x10<host>
loop txqueuelen 1000 (Local Loopback)
RX packets 209246 bytes 151109398 (144.1 MiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 209246 bytes 151109398 (144.1 MiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
➜ ~ nmap 192.168.110.4
Starting Nmap 7.94 ( https://nmap.org ) at 2023-05-27 23:03 CST
Nmap scan report for archlinux.lan (192.168.110.4)
Host is up (0.00064s latency).
Not shown: 999 closed tcp ports (conn-refused)
PORT STATE SERVICE
22/tcp open ssh
Nmap done: 1 IP address (1 host up) scanned in 0.16 seconds
```
离线
