-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:

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.

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.

If you started the server manually just for testing, restart it with the ‘–protected-mode no’ option.

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.

Error message when using pycharm to connect to redis:

Detect redis port 6379 through telnet command

Solution:

Set protected-mode no

Check the redis port 6379 through the telnet command again, and there is no access exception.

Run Python again to connect to redis:

Supplementary knowledge:

When you use telnet (telnet IP port number) to connect to the host under Linux/Unix, you will be prompted “escape character is’ ^] ‘. What does this mean? How to solve it?

Escape character is ‘^]’. Solution

“^” means the Ctrl key!

1. This prompt means that pressing Ctrl +] will call out the command line of Telnet!

2. After the telnet command line comes out, you can execute the telnet command;

3. Exit the telnet command line with the name quit.

Common telnet commands

close closes the current connection

logout forces the remote user to exit and close the connection

display displays the parameters of the current operation

mode attempted to enter command line mode or character mode

open connect to a site

quit exit

telnetsend send special characters

set sets the parameters of the current operation

unset resets the current operating parameters

status print status information

toggle switch operation parameters

slc changes the state of special characters

Auth on/off confirmation function Z suspended

Telnetenviron changes the environment variable and displays help

To sum up, escape character is’ ^] ‘. It is just a prompt that you can call the command line of Telnet using Ctrl +] key.