127.0.0.1 포트 80에 연결하지 못했습니다

nginx 서버를 실행 중입니다 (어떤 서버는 중요하지 않습니다).

$ sudo netstat -tulpn | grep 80

  tcp     0      0 0.0.0.0:80   0.0.0.0:*         LISTEN      4268/nginx      
  tcp6    0      0 :::80        :::*              LISTEN      4268/nginx

그런 다음 127.0.0.1로 요청을 보냈습니다.

$ curl -v 127.0.0.1

* Rebuilt URL to: 127.0.0.1/
* Hostname was NOT found in DNS cache
*   Trying 127.0.0.1...
* connect to 127.0.0.1 port 80 failed: Connection refused
* Failed to connect to 127.0.0.1 port 80: Connection refused
* Closing connection 0
curl: (7) Failed to connect to 127.0.0.1 port 80: Connection refused

$ telnet localhost 80

Trying 127.0.0.1...
telnet: Unable to connect to remote host: Connection refused

모든 권리 / etc / hosts 파일 :

127.0.1.1   ubuntu-work
127.0.0.1   localhost

# The following lines are desirable for IPv6 capable hosts 
::1     ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters

iptables 비활성화 $ sudo iptables -L:

Chain INPUT (policy ACCEPT)
target     prot opt source               destination         

Chain FORWARD (policy ACCEPT)
target     prot opt source               destination         

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination 

주소 127에 연결할 수 있다는 것이 흥미 롭습니다 . . * 127.0.0.1 (localhost) 제외 또한 서브넷 IP 주소 10.0.2.15와 연결할 수 있습니다. 그리고 서버 구성에서 포트 80을 다른 포트로 변경하면 (예 : Listen 88) 작동합니다.

나는 $ sudo nmap -sS 127.0.0.1 -p 80info- 80 / tcp closed 시도했지만 포트 80에서 nginx 서버를 실행하면 어떻게 가능합니까?

Nmap scan report for localhost (127.0.0.1)
Host is up (0.00011s latency).
PORT   STATE  SERVICE
80/tcp closed http

Nmap done: 1 IP address (1 host up) scanned in 1.12 seconds

루프백 인터페이스가 작동 중입니다. $ ifconfig

eth0  Link encap:Ethernet  HWaddr 08:00:27:86:5f:e3  
      inet addr:10.0.2.15  Bcast:10.0.2.255  Mask:255.255.255.0
      inet6 addr: fe80::a00:27ff:fe86:5fe3/64 Scope:Link
      UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
      RX packets:588 errors:0 dropped:0 overruns:0 frame:0
      TX packets:616 errors:0 dropped:0 overruns:0 carrier:0
      collisions:0 txqueuelen:1000 
      RX bytes:262986 (262.9 KB)  TX bytes:103011 (103.0 KB)

lo    Link encap:Local Loopback  
      inet addr:127.0.0.1  Mask:255.0.0.0
      inet6 addr: ::1/128 Scope:Host
      UP LOOPBACK RUNNING  MTU:65536  Metric:1
      RX packets:276 errors:0 dropped:0 overruns:0 frame:0
      TX packets:276 errors:0 dropped:0 overruns:0 carrier:0
      collisions:0 txqueuelen:0 
      RX bytes:32750 (32.7 KB)  TX bytes:32750 (32.7 KB)

다른 iptables 테이블

출력 $ sudo iptables -t nat -nvL:

Chain PREROUTING (policy ACCEPT 1 packets, 40 bytes)
pkts bytes target     prot opt in     out     source               destination         
0     0 REDIRECT   tcp  --  eth0   *       0.0.0.0/0            0.0.0.0/0            tcp dpt:80 redir ports 20559
0     0 REDIRECT   tcp  --  eth0   *       0.0.0.0/0            0.0.0.0/0            tcp dpt:443 redir ports 20558

Chain INPUT (policy ACCEPT 1 packets, 40 bytes)
pkts bytes target     prot opt in     out     source               destination         

Chain OUTPUT (policy ACCEPT 1043 packets, 65731 bytes)
pkts bytes target     prot opt in     out     source               destination         
0     0 REDIRECT   tcp  --  *      *       0.0.0.0/0            127.0.0.1            tcp dpt:80 redir ports 20559
0     0 REDIRECT   tcp  --  *      *       0.0.0.0/0            127.0.0.1            tcp dpt:443 redir ports 20558

Chain POSTROUTING (policy ACCEPT 1043 packets, 65731 bytes)
pkts bytes target     prot opt in     out     source               destination

의 출력을 얻지 못했습니다 sudo iptables -t mangle -nVL. 버전 만 :iptables v1.4.21

출력 sudo iptables -t mangle -nL

   Chain PREROUTING (policy ACCEPT)
   target     prot opt source               destination         

   Chain INPUT (policy ACCEPT)
   target     prot opt source               destination         

   Chain FORWARD (policy ACCEPT)
   target     prot opt source               destination         

   Chain OUTPUT (policy ACCEPT)
   target     prot opt source               destination         

   Chain POSTROUTING (policy ACCEPT)
   target     prot opt source               destination 

localhost : 80을 차단하는 것에 대한 아이디어가 있으면 도와주세요.

포트 80을 차단하는 것은 없습니다. 방화벽 NAT 규칙 만 있으면 해당 포트에 대한 연결을 열려 있지 않은 다른 포트로 리디렉션합니다.

Chain PREROUTING (policy ACCEPT 1 packets, 40 bytes)
pkts bytes target     prot opt in     out     source               destination         
0     0 REDIRECT   tcp  --  eth0   *       0.0.0.0/0            0.0.0.0/0            tcp dpt:80 redir ports 20559
0     0 REDIRECT   tcp  --  eth0   *       0.0.0.0/0            0.0.0.0/0            tcp dpt:443 redir ports 20558

Chain OUTPUT (policy ACCEPT 1043 packets, 65731 bytes)
pkts bytes target     prot opt in     out     source               destination         
0     0 REDIRECT   tcp  --  *      *       0.0.0.0/0            127.0.0.1            tcp dpt:80 redir ports 20559
0     0 REDIRECT   tcp  --  *      *       0.0.0.0/0            127.0.0.1            tcp dpt:443 redir ports 20558

이 규칙을 제거하여 문제점을 해결하십시오.