postgresql - 在 Ubuntu 中打开端口

Question

所以我正在使用 AWS 和 EC2，我正在尝试为 Postgresql 打开一个端口。在 AWS 中我已经打开了它:

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，端口似乎正在监听:

# netstat -an | grep 5432
tcp        0      0 127.0.0.1:5432          0.0.0.0:*               LISTEN

当我执行 localhost nmap 时，我得到以下信息:

 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。当我从替代主机执行 nmap 时，我得到以下信息:

PORT      STATE  SERVICE
22/tcp    open   ssh
80/tcp    open   http
5432/tcp  closed postgresql

我还查看了我的 iptables 看是否遗漏了什么，但是 iptables 看起来是空的(这应该意味着它们并没有做太多事情)

$ 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

我是否遗漏了什么，因为我似乎无法弄清楚如何访问 ip。每当我尝试时，我都会收到以下错误:

Is the server running on host "xx.xx.xx.xx" and accepting TCP/IP connections on port 5432?

如何才能打开端口以便外部服务器可以访问它？提前致谢 =) 让我知道您是否需要任何其他数据。

编辑:如下所述，我测试了远程登录，我能够远程登录到本地主机，但是当从外部尝试时，我得到:

$ telnet xx.xx.xx.xx 5432
Trying xx.xx.xx.xx...
telnet: Unable to connect to remote host: Connection refused

此外，我仔细检查过，我能够正确地通过 telnet 进入 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

Answer 1

编辑 /etc/postgresql/<version>/main/postgresql.conf并设置 listen_addresses到您的传出接口(interface)或全部。重启 postgresql:sudo service postgresql restart .