我有主机 20.04 和客户虚拟机盒 22.04
我尝试运行 curl 命令，但两台机器都出现了相同的错误。
运行此程序的主机：
sudo ufw status
Status: active
To Action From
-- ------ ----
5000:5100/tcp ALLOW Anywhere
1433 ALLOW Anywhere
1434 ALLOW Anywhere
8080 ALLOW Anywhere
OpenSSH ALLOW Anywhere
80/tcp ALLOW Anywhere
80 ALLOW 127.0.0.1
5000:5100/tcp (v6) ALLOW Anywhere (v6)
1433 (v6) ALLOW Anywhere (v6)
1434 (v6) ALLOW Anywhere (v6)
8080 (v6) ALLOW Anywhere (v6)
OpenSSH (v6) ALLOW Anywhere (v6)
80/tcp (v6) ALLOW Anywhere (v6)
是的，有重复的规则，但我之前也遇到过同样的错误。
我尝试过将 curl 与 localhost 或 127.0.0.1 或 :80 或 :8080 组合使用，但仍然出现类似的错误
curl: (7) Failed to connect to 127.0.0.1 port 8080: Connection refused
sudo netstat -tunlp
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
tcp 0 0 127.0.0.1:1434 0.0.0.0:* LISTEN 1514/sqlservr
tcp 0 0 127.0.0.1:1431 0.0.0.0:* LISTEN 1514/sqlservr
tcp 0 0 127.0.0.1:631 0.0.0.0:* LISTEN 200812/cupsd
tcp 0 0 127.0.0.1:33060 0.0.0.0:* LISTEN 1169/mysqld
tcp 0 0 127.0.0.1:3306 0.0.0.0:* LISTEN 1169/mysqld
tcp 0 0 127.0.0.53:53 0.0.0.0:* LISTEN 923/systemd-resolve
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 1121/sshd: /usr/sbi
tcp 0 0 0.0.0.0:1433 0.0.0.0:* LISTEN 1514/sqlservr
tcp6 0 0 ::1:631 :::* LISTEN 200812/cupsd
tcp6 0 0 ::1:1431 :::* LISTEN 1514/sqlservr
tcp6 0 0 ::1:1434 :::* LISTEN 1514/sqlservr
tcp6 0 0 :::22 :::* LISTEN 1121/sshd: /usr/sbi
tcp6 0 0 :::1433 :::* LISTEN 1514/sqlservr
udp 0 0 127.0.0.53:53 0.0.0.0:* 923/systemd-resolve
udp 0 0 0.0.0.0:631 0.0.0.0:* 200814/cups-browsed
udp 0 0 0.0.0.0:54075 0.0.0.0:* 987/avahi-daemon: r
udp 0 0 224.0.0.251:5353 0.0.0.0:* 22568/chrome
udp 0 0 224.0.0.251:5353 0.0.0.0:* 22612/chrome --type
udp 0 0 0.0.0.0:5353 0.0.0.0:* 987/avahi-daemon: r
udp6 0 0 :::55564 :::* 987/avahi-daemon: r
udp6 0 0 :::5353 :::*
当我尝试查看端口 80 或 8080 是否正在监听时，也没有得到任何结果
sudo netstat -tnlp | grep :22
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 1121/sshd: /usr/sbi
tcp6 0 0 :::22 :::* LISTEN 1121/sshd: /usr/sbi
uss:~$ sudo netstat -tnlp | grep :80
uss:~$ sudo netstat -tnlp | grep :8080