Nginx sunucusu çalıştırıyorum (hangi sunucu önemli değil):
$ 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
Sonra 127.0.0.1'e istek gönderdim
$ 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
Tüm sağ / etc / hosts :
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 devre dışı $ 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
Herhangi bir adrese 127 bağlanabilmem ilginç . . * 127.0.0.1 (localhost) hariç. Ayrıca alt ağ ip adresim 10.0.2.15 ile bağlanabilirim. Ve 80 numaralı bağlantı noktasını sunucu yapılandırmasında başka bir tanesiyle değiştirirsem (örn. Listen 88) çalışır.
Denedim $ sudo nmap -sS 127.0.0.1 -p 80
ve bilgi var - 80 / tcp kapatıldı , ancak 80 numaralı bağlantı noktasında nginx sunucusu çalıştırılıyorsa nasıl mümkün olabilir?
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
geridöngü arayüzü var: $ 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)
Diğer iptables tabloları
Çıktı $ 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
Herhangi bir çıktı almadım sudo iptables -t mangle -nVL
, sadece sürüm:iptables v1.4.21
Çıktı 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'u engelleyen şeyler hakkında herhangi bir fikriniz varsa lütfen bana yardım edin: 80.
iptables
tablolar için çıktı , lütfen (yani iptables -t nat -nvL
ve iptables -t mangle -nVL
)