Nginx的偵聽的端口80或443，但沒有響應

Question

我的服務器是工作非常精細，直到幾個小時前，在某種程度上它停止接聽來電話，

我盤算了一下，麒麟工作正常（捲曲本地主機：3000作品 - 其中3000是麒麟的端口）

我跑：

sudo netstat -anltp 
Active Internet connections (servers and established) 
Proto Recv-Q Send-Q Local Address   Foreign Address   State  PID/Program name 
tcp  0  0 127.0.0.1:3306   0.0.0.0:*    LISTEN  5664/mysqld  
tcp  0  0 my.public.ip.address:80  0.0.0.0:*    LISTEN  6825/nginx  
tcp  0  0 0.0.0.0:22    0.0.0.0:*    LISTEN  2737/sshd  
tcp  0  0 0.0.0.0:3000   0.0.0.0:*    LISTEN  6389/unicorn.rb -E 
tcp  0  0 0.0.0.0:25    0.0.0.0:*    LISTEN  2934/master  
tcp  0  0 my.public.ip.address:443  0.0.0.0:*    LISTEN  6825/nginx  
tcp  0  0 my.public.ip.address:22  a.different.ip.number:49372  ESTABLISHED 3433/sshd: user 
tcp  0 232 my.public.ip.address:22  a.different.ip.number:49909  ESTABLISHED 6887/sshd: user 
tcp6  0  0 :::22     :::*     LISTEN  2737/sshd  
tcp6  0  0 :::25     :::*     LISTEN  2934/master  

它似乎這兩個端口80和443是由nginx的開放，但是當我嘗試捲曲本地主機：

$ curl localhost 
curl: (7) Failed connect to localhost:80; Connection refused 
$ curl https://localhost 
curl: (7) Failed connect to localhost:443; Connection refused 

由ssh使用的端口22似乎工作正常。因爲我通過ssh登錄的對話框：

這是我/etc/nginx/nginx.conf文件：

user www-data; 
worker_processes 4; 
pid /run/nginx.pid; 

events { 
    worker_connections 768; 
    # multi_accept on; 
} 

http { 

    sendfile on; 
    tcp_nopush on; 
    tcp_nodelay on; 
    keepalive_timeout 65; 
    types_hash_max_size 2048; 

    include /etc/nginx/mime.types; 
    default_type application/octet-stream; 

    access_log /var/log/app/nginx_access.log; 
    error_log /var/log/app/nginx_error.log; 

    gzip on; 
    gzip_disable "msie6"; 

    include /etc/nginx/conf.d/*.conf; 
    include /etc/nginx/sites-enabled/*; 
} 

這裏是我的/etc/nginx/sites-enabled/app文件：

upstream unicorn { 
    server 0.0.0.0:3000 fail_timeout=0; 
} 

server { 
    listen my.ip.num.ber:80; 
    server_name www.mydomainname.com; 

    location/{ 
    rewrite^https://$server_name$request_uri permanent; 
    } 
} 

server { 
    listen my.ip.num.ber:443 ssl; 
    server_name www.mydomainname.com; 

    client_max_body_size 4G; 
    keepalive_timeout 5; 

    root /var/www/mydomainname/releases/20140417140248/public/; 

    try_files $uri $uri/index.html $uri.html @unicorn; 

    ssl_certificate  /srv/ssl/mydomainname.chained.crt; 
    ssl_certificate_key /srv/ssl/mydomainname.key; 

    ssl_session_timeout 5m; 

    ssl_protocols SSLv2 SSLv3 TLSv1; 
    ssl_ciphers HIGH:!aNULL:!MD5; 
    ssl_prefer_server_ciphers on; 


    location /assets/ { 
    gzip_static on; 
    expires max; 
    add_header Cache-Control public; 
    # alias /var/www/mydomainname/releases/20140417140248/public/; 
    } 


    location @unicorn { 
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; 
    proxy_set_header Host $http_host; 
    proxy_redirect off; 
    proxy_intercept_errors on; 

    proxy_pass http://unicorn; 
    } 

} 

從使用nmap掃描我看到：

$ sudo nmap -sS -O 127.0.0.1 

Starting Nmap 6.40 (http://nmap.org) at 2014-04-17 14:44 UTC 
Nmap scan report for localhost (127.0.0.1) 
Host is up (0.000062s latency). 
Not shown: 996 closed ports 
PORT  STATE SERVICE 
22/tcp open ssh 
25/tcp open smtp 
3000/tcp open ppp 
3306/tcp open mysql 
No exact OS matches for host (If you know what OS is running on it, see http://nmap.org/submit/). 
TCP/IP fingerprint: 
OS:SCAN(V=6.40%E=4%D=4/17%OT=22%CT=1%CU=30717%PV=N%DS=0%DC=L%G=Y%TM=534FE8C 
OS:8%P=x86_64-unknown-linux-gnu)SEQ(SP=107%GCD=1%ISR=10B%TI=Z%CI=I%II=I%TS= 
OS:8)OPS(O1=MFFD7ST11NW7%O2=MFFD7ST11NW7%O3=MFFD7NNT11NW7%O4=MFFD7ST11NW7%O 
OS:5=MFFD7ST11NW7%O6=MFFD7ST11)WIN(W1=AAAA%W2=AAAA%W3=AAAA%W4=AAAA%W5=AAAA% 
OS:W6=AAAA)ECN(R=Y%DF=Y%T=40%W=AAAA%O=MFFD7NNSNW7%CC=Y%Q=)T1(R=Y%DF=Y%T=40% 
OS:S=O%A=S+%F=AS%RD=0%Q=)T2(R=N)T3(R=N)T4(R=Y%DF=Y%T=40%W=0%S=A%A=Z%F=R%O=% 
OS:RD=0%Q=)T5(R=Y%DF=Y%T=40%W=0%S=Z%A=S+%F=AR%O=%RD=0%Q=)T6(R=Y%DF=Y%T=40%W 
OS:=0%S=A%A=Z%F=R%O=%RD=0%Q=)T7(R=Y%DF=Y%T=40%W=0%S=Z%A=S+%F=AR%O=%RD=0%Q=) 
OS:U1(R=Y%DF=N%T=40%IPL=164%UN=0%RIPL=G%RID=G%RIPCK=G%RUCK=G%RUD=G)IE(R=Y%D 
OS:FI=N%T=40%CD=S) 

Network Distance: 0 hops 

OS detection performed. Please report any incorrect results at http://nmap.org/submit/ . 
Nmap done: 1 IP address (1 host up) scanned in 12.27 seconds 

任何線索？

感謝

增加：

nginx的與listen 80和listen 443配置重新啓動後，這裏是我的新的netstat：

sudo netstat -ntulp 
Active Internet connections (only servers) 
Proto Recv-Q Send-Q Local Address   Foreign Address   State  PID/Program name 
tcp  0  0 127.0.0.1:3306   0.0.0.0:*    LISTEN  5664/mysqld  
tcp  0  0 0.0.0.0:80    0.0.0.0:*    LISTEN  7845/nginx  
tcp  0  0 0.0.0.0:22    0.0.0.0:*    LISTEN  2737/sshd  
tcp  0  0 0.0.0.0:3000   0.0.0.0:*    LISTEN  6389/unicorn.rb -E 
tcp  0  0 0.0.0.0:25    0.0.0.0:*    LISTEN  2934/master  
tcp  0  0 0.0.0.0:443    0.0.0.0:*    LISTEN  7845/nginx  
tcp6  0  0 :::22     :::*     LISTEN  2737/sshd  
tcp6  0  0 :::25     :::*     LISTEN  2934/master  
udp  0  0 0.0.0.0:57284   0.0.0.0:*       2418/dhclient 
udp  0  0 0.0.0.0:68    0.0.0.0:*       2418/dhclient 
udp  0  0 my.public.ip.addr:123  0.0.0.0:*       3550/ntpd  
udp  0  0 127.0.0.1:123   0.0.0.0:*       3550/ntpd  
udp  0  0 0.0.0.0:123    0.0.0.0:*       3550/ntpd  
udp6  0  0 :::55187    :::*        2418/dhclient 
udp6  0  0 ::1:123     :::*        3550/ntpd  
udp6  0  0 :::123     :::*        3550/ntpd 

Answer 1

事實證明，DNS配置瘋了，並指出我的域名到別的地方。我修復了DNS，以便網站很快回來。

感謝

Answer 2

你的nginx聽my.ip.num.ber，但你嘗試連接到本地主機，幾乎都是127.0.0.1。你的nginx不聽這個ip。

只需從listen指令中刪除my.ip.num.ber即可。讓他們listen 80;和listen 443 ssl;。