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端口 80 显示为已过滤，ufw 处于非活动状态

tag-icon • tag-icon networking server iptables firewall ufw
端口 80 显示为已过滤，ufw 处于非活动状态 
sudo nmap -sS 3.139.146.153

PORT     STATE    SERVICE
22/tcp   open     ssh
25/tcp   filtered smtp
80/tcp   filtered http
443/tcp  open     https
3306/tcp open     mysql
7000/tcp open     afs3-fileserver
7200/tcp open     fodms
8000/tcp open     http-alt

sudo iptables -xvnL给出以下输出

Chain INPUT (policy ACCEPT 543021 packets, 222443266 bytes)
    pkts      bytes target     prot opt in     out     source               destination
      14      870 ACCEPT     tcp  --  *      *       0.0.0.0/0            0.0.0.0/0            tcp dpt:80
       0        0 ACCEPT     tcp  --  *      *       0.0.0.0/0            0.0.0.0/0            tcp dpt:80
       0        0 ACCEPT     tcp  --  *      *       0.0.0.0/0            0.0.0.0/0            tcp dpt:80
       0        0 ACCEPT     tcp  --  *      *       0.0.0.0/0            0.0.0.0/0            tcp dpt:80

Chain FORWARD (policy DROP 0 packets, 0 bytes)
    pkts      bytes target     prot opt in     out     source               destination
   14676  3583305 DOCKER-USER  all  --  *      *       0.0.0.0/0            0.0.0.0/0
   14676  3583305 DOCKER-ISOLATION-STAGE-1  all  --  *      *       0.0.0.0/0            0.0.0.0/0
    6237  1145719 ACCEPT     all  --  *      docker0  0.0.0.0/0            0.0.0.0/0            ctstate RELATED,ESTABLISHED
    1307    71072 DOCKER     all  --  *      docker0  0.0.0.0/0            0.0.0.0/0
    7132  2366514 ACCEPT     all  --  docker0 !docker0  0.0.0.0/0            0.0.0.0/0
       0        0 ACCEPT     all  --  docker0 docker0  0.0.0.0/0            0.0.0.0/0

Chain OUTPUT (policy ACCEPT 422937 packets, 410376615 bytes)
    pkts      bytes target     prot opt in     out     source               destination

Chain DOCKER (1 references)
    pkts      bytes target     prot opt in     out     source               destination
     184     9948 ACCEPT     tcp  --  !docker0 docker0  0.0.0.0/0            172.17.0.2           tcp dpt:8000

Chain DOCKER-ISOLATION-STAGE-1 (1 references)
    pkts      bytes target     prot opt in     out     source               destination
    7132  2366514 DOCKER-ISOLATION-STAGE-2  all  --  docker0 !docker0  0.0.0.0/0            0.0.0.0/0
   14676  3583305 RETURN     all  --  *      *       0.0.0.0/0            0.0.0.0/0

Chain DOCKER-ISOLATION-STAGE-2 (1 references)
    pkts      bytes target     prot opt in     out     source               destination
       0        0 DROP       all  --  *      docker0  0.0.0.0/0            0.0.0.0/0
    7132  2366514 RETURN     all  --  *      *       0.0.0.0/0            0.0.0.0/0

Chain DOCKER-USER (1 references)
    pkts      bytes target     prot opt in     out     source               destination
   14676  3583305 RETURN     all  --  *      *       0.0.0.0/0            0.0.0.0/0

那么我们如何开放80端口呢？

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