无法在 AWS EC2 端口 6379 上连接 redis 服务器

Question

我在 EC2 上有两台服务器。一个托管我的 php 应用程序，另一个托管我的 redis 服务器。我在 redis 服务器上管理我的 php 会话和数据。因此，在我的 php 服务器上，我将 ip:port 作为会话保存路径并在 stderr 中发送了错误 FastCGI：“PHP 消息：PHP 致命错误：未捕获的异常 'RedisException' 和消息'连接关闭'

我需要在我的 redis 实例上为入站流量打开端口 6379。我通过在 AWS 安全组中设置自定义 TCP 设置来打开它，但端口仍然对外界关闭。但我能够监听 redis 服务器本身的端口。我在这个过程中遗漏了什么吗？我是否需要在某处进行任何其他更改。请指导我。我对 AWS 管理非常陌生 在实例 1 上：我正在使用 php、Apache 和 phpredis 在实例 2 上：使用 Redis

但是我在通过端口 11211 连接的实例 2 上安装了 Memcached，没有任何问题。我对 Redis 使用了相同的安全规则

Answer 1

默认情况下redis只监听127.0.0.1，你需要明确告诉redis监听其他接口或任何节点。根据您的发行版，这可能类似于/etc/redis.conf。

最重要的是，如果你想让redis监听所有地址（0.0.0.0），你应该在redis.conf中设置proetected-mode no。

当您配置 redis 时，看在上帝的份上，请确保在您的安全组设置中，您定义端口仅对 IP 或安全组开放需要连接到redis的PHP服务器，而不是连接到整个世界。

作为参考，这里是 redis.conf 中关于绑定的配置部分：

# By default, if no "bind" configuration directive is specified, Redis listens
# for connections from all the network interfaces available on the server.
# It is possible to listen to just one or multiple selected interfaces using
# the "bind" configuration directive, followed by one or more IP addresses.
#
# Examples:
# 
# bind 192.168.1.100 10.0.0.1
# bind 127.0.0.1 ::1
#
# ~~~ WARNING ~~~ If the computer running Redis is directly exposed to the
# internet, binding to all the interfaces is dangerous and will expose the
# instance to everybody on the internet. So by default we uncomment the
# following bind directive, that will force Redis to listen only into
# the IPv4 lookback interface address (this means Redis will be able to
# accept connections only from clients running into the same computer it
# is running).
#
# IF YOU ARE SURE YOU WANT YOUR INSTANCE TO LISTEN TO ALL THE INTERFACES
# JUST COMMENT THE FOLLOWING LINE.
# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
bind 127.0.0.1

# Protected mode is a layer of security protection, in order to avoid that
# Redis instances left open on the internet are accessed and exploited.
#
# When protected mode is on and if:
#
# 1) The server is not binding explicitly to a set of addresses using the
#    "bind" directive.
# 2) No password is configured.
#
# The server only accepts connections from clients connecting from the
# IPv4 and IPv6 loopback addresses 127.0.0.1 and ::1, and from Unix domain
# sockets.
#
# By default protected mode is enabled. You should disable it only if
# you are sure you want clients from other hosts to connect to Redis
# even if no authentication is configured, nor a specific set of interfaces
# are explicitly listed using the "bind" directive.
protected-mode yes