问题描述
因此,我使用的是使用EC2的AWS,并且试图为Postgresql打开一个端口。在AWS中,我已经打开它了:
TCP
Port (Service) Source Action
0 - 65535 sg-92aadda2 (default) Delete
22 (SSH) 0.0.0.0/0 Delete
80 (HTTP) 0.0.0.0/0 Delete
5432 0.0.0.0/0 Delete
当我执行netstat时,好像端口正在侦听:
# netstat -an | grep 5432
tcp 0 0 127.0.0.1:5432 0.0.0.0:* LISTEN
当我执行本地主机nmap时,得到以下信息:
Nmap scan report for localhost (127.0.0.1)
Host is up (0.000010s latency).
Not shown: 997 closed ports
PORT STATE SERVICE
22/tcp open ssh
80/tcp open http
5432/tcp open postgresql
这就是乐趣的开始。当我从备用主机执行nmap时,我得到以下信息:
PORT STATE SERVICE
22/tcp open ssh
80/tcp open http
5432/tcp closed postgresql
我还查看了iptables以查看是否丢失了某些东西,但是iptables看起来空了(这应该意味着它们实际上并没有做很多事情)
$ iptables -L
Chain INPUT (policy ACCEPT)
target prot opt source destination
ACCEPT all -- anywhere anywhere
REJECT all -- anywhere 127.0.0.0/8 reject-with icmp-port-unreachable
ACCEPT all -- anywhere anywhere state RELATED,ESTABLISHED
ACCEPT tcp -- anywhere anywhere tcp dpt:http
ACCEPT tcp -- anywhere anywhere tcp dpt:https
ACCEPT tcp -- anywhere anywhere state NEW tcp dpt:ssh
ACCEPT tcp -- anywhere anywhere tcp dpt:postgresql
ACCEPT icmp -- anywhere anywhere
LOG all -- anywhere anywhere limit: avg 5/min burst 5 LOG level debug prefix "iptables denied: "
DROP all -- anywhere anywhere
Chain FORWARD (policy ACCEPT)
target prot opt source destination
DROP all -- anywhere anywhere
Chain OUTPUT (policy ACCEPT)
target prot opt source destination
ACCEPT all -- anywhere anywhere
我是否缺少某些原因,因为我似乎无法弄清楚如何访问ip。每当我尝试时,都会出现以下错误:
Is the server running on host "xx.xx.xx.xx" and accepting TCP/IP connections on port 5432?
如何使它开放端口,以便外部服务器可以访问它?在此先感谢=)Lemme知道您是否需要其他数据。
编辑:如下所示,我测试了telnetting,并且能够telnet到localhost,但是从外部尝试时却得到:
$ telnet xx.xx.xx.xx 5432
Trying xx.xx.xx.xx...
telnet: Unable to connect to remote host: Connection refused
另外,我仔细检查了一下,并能够将telnet正确地连接到ssh:
$ telnet xx.xx.xx.xx 22
Trying xx.xx.xx.xx...
Connected to xx.xx.xx.xx.
Escape character is '^]'.
SSH-2.0-OpenSSH_5.9p1 Debian-5ubuntu1.1
最佳方案
编辑/etc/postgresql/<version>/main/postgresql.conf
并将listen_addresses
设置为您的传出接口或全部。重新启动postgresql:sudo service postgresql restart
。
次佳方案
它为我工作的最后一种方法(认为朱利奥):
编辑:postgresql.conf
sudo nano /etc/postgresql/9.3/main/postgresql.conf
启用或添加:
listen_addresses = '*'
重新启动数据库引擎:
sudo service postgresql restart
此外,您可以检查文件:pg_hba.conf
sudo nano /etc/postgresql/9.3/main/pg_hba.conf
并添加您的网络或主机地址:
host all all 192.168.1.0/24 md5
第三种方案
如果您编辑了postgresql.conf和main /pg_hba.conf仍然有问题,请尝试使用sudo ufw allow 5432 /tcp取消阻止psql端口