使用jedis鏈接遠程redis，出現鏈接超時

1.檢查是否關閉linux的防火牆

cent6.x關閉防火牆語句：service iptables stop

禁止開機啓動防火牆：chkconfig iptables off

centos7的防火牆已經變了，關閉語句爲：systemctl stop firewalld.service

禁止防火牆開機啓動：systemctl disable firewalld.service

2.查看配置文件redis.conf

redis默認只容許本地訪問，要使redis能夠遠程訪問能夠修改redis.conf

打開redis.conf文件在NETWORK部分有說明

# 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 loopback 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

　　

解決辦法：註釋掉bind 127.0.0.1能夠使全部的ip訪問redis

如果想指定多個ip訪問，但並非所有的ip訪問，能夠bind

注意

下面還有個說明

# 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 no

　　在redis3.2以後，redis增長了protected-mode，在這個模式下，即便註釋掉了bind 127.0.0.1，再訪問redisd時候仍是報錯，以下

(error) DENIED Redis is running in protected mode because protected mode is enabled, no bind address was specified, no authentication password is requested to clients. In this mode connections are only accepted from the loopback interface. If you want to connect from external computers to Redis you may adopt one of the following solutions: 1) Just disable protected mode sending the command 'CONFIG SET protected-mode no' from the loopback interface by connecting to Redis from the same host the server is running, however MAKE SURE Redis is not publicly accessible from internet if you do so. Use CONFIG REWRITE to make this change permanent. 2) Alternatively you can just disable the protected mode by editing the Redis configuration file, and setting the protected mode option to 'no', and then restarting the server. 3) If you started the server manually just for testing, restart it with the '--protected-mode no' option. 4) Setup a bind address or an authentication password. NOTE: You only need to do one of the above things in order for the server to start accepting connections from the outside.

修改辦法：protected-mode no

3.重啓redis服務

[root@CentOS7 bin]# ./redis-server redis.conf（redis配置文件路徑）// 重啓redis服務並加載配置

[root@CentOS7 bin]# ps -ef |grep redis //查看redis的進程，查看進程id

kill -9 進程id     //根據進程id，中止(殺死)進程