Redis - Connect to Remote Server

Question

I ve just install Redis succesfully using the instructions on the Quick Start guide on http   redis io topics quickstart on my Ubuntu 10 10 server  I m running the service as  dameon  so it can be run by init d   The server is part of Rackspace Cluster with Internal and External IPs  The host is running on port 6379  standard for Redis   I ve added a row in the iptables to allow incoming connections from port 6379 as shown below    ACCEPT     tcp  --  anywhere             anywhere            tcp dpt 6379    In my PHP code on another server  I m trying to connect to the new Redis server here    this- gt load- gt helper  iredis      hostname    IP ADDRESS HERE     redis   new iRedis array  hostname    gt   hostname   port    gt  6379      Once I do this - I always get a connection refused  In my    redis conf   file  I have the local bind command commented out  so it should be listening on more than the localhost IP  I can connect to the database on the local machine just not on another server  I ve tried the external and internal IPs with no luck   Any suggestions on getting this to work

User · Answer

I ve been stuck with the same issue  and the preceding answer did not help me  albeit well written    The solution is here   check your  etc redis redis conf  and make sure to change the default  bind 127 0 0 1   to  bind 0 0 0 0   Then restart your service  service redis-server restart   You can then now check that redis is listening on non-local interface with  redis-cli -h 192 168 x x ping    replace 192 168 x x with your IP adress   Important note   as several users stated  it is not safe to set this on a server which is exposed to the Internet  You should be certain that you redis is protected with any means that fits your needs

User · Answer

I was struggling with the remote connection to Redis for some days  Finally I made it  Here is the full check list I put together to follow to get connected  Some of solutions are given in the answers above  Yet I wanted my answer to be a nano-wiki on the subject   I added some useful links too   If redis works locally     redis-cli 127 0 0 1 6379 gt ping PONG 127 0 0 1 6379 gt    If the password is not set  See  etc redis redis conf config  this is default locaion for Ubuntu 18 04  you may have it in the different location      The following line should be commented   requirepass  lt some pass if any gt    If the protected mode is set to  no  in the config     The following line should be uncommented protected-mode no   if the IP binding is open for an access from internet in the config     The following line should be commented   bind 127 0 0 1   1   If the Linux firewall allows connections   here for Ubuntu 18 04  Check it allows for incoming internet traffic to go to port 6379  the Redis default port     To check if it the port is open   sudo ufw status Status  active  To                         Action      From --                         ------      ----     6379 tcp                   ALLOW       Anywhere 6379 tcp  v6               ALLOW       Anywhere  v6         To open the port   sudo ufw allow 6379 tcp   Restart Redis service  Do not forget to restart the Redis service for changes to take effect and see it is running     sudo systemctl restart redis service   sudo systemctl status redis   Check if it works as a remote server  from your command line use redis-cli as if Redis server were on the remote server     redis-cli -h  lt your-server-ip gt   lt your-server-ip gt  6379 gt  ping PONG  lt your-server-ip gt  6379 gt  exit     If you can ping-PONG your Redis server via your internet server connected as a remote server than the remote Redis connection works   Security Warning  All the above makes your Redis data to be completely open to anybody from the internet    To basically secure Redis use requirepass and protected-mode yes settings in Redis config  see above  and block the dangerous Redis commands  see the link above   for a deeper understanding see this article and Redis site security section     Useful links  Some links to help How to install and secure Redis on Ubuntu 18 04 and how to setup Ubuntu 18 04 firewall   Hope it helps

User · Answer

In addition to the excellent answer given by Orab  g   I resolved this issue by removing the bind section entirely and setting protected-mode to no     bind 127 0 0 1 protected-mode no   Never use this method on publicly exposed servers

User · Answer

if you downloaded redis yourself  not apt-get install redis-server  and then edited the redis conf with the above suggestions  make sure your start redis with the config like so    src redis-server redis conf                                also side note i am including a screenshot of virtual box setting to connect to redis  if you are on windows and connecting to a virtualbox vm

User · Answer

Setting tcp-keepalive to 60  it was set to 0  in server s redis configuration helped me resolve this issue

User · Answer

First I d check to verify it is listening on the IPs you expect it to be   netstat -nlpt   grep 6379   Depending on how you start stop you may not have actually restarted the instance when you thought you had  The netstat will tell you if it is listening where you think it is  If not  restart it and be sure it restarts  If it restarts and still is not listening where you expect  check your config file just to be sure   After establishing it is listening where you expect it to  from a remote node which should have access try   redis-cli -h REMOTE HOST ping   You could also try that from the local host but use the IP you expect it to be listening on instead of a hostname or localhost  You should see it PONG in response in both cases    If not  your firewall s  is are blocking you  This would be either the local IPTables or possibly a firewall in between the nodes  You could add a logging statement to your IPtables configuration to log connections over 6379 to see what is happening  Also  trying he redis ping from local and non-local to the same IP should be illustrative  If it responds locally but not remotely  I d lean toward an intervening firewall depending on the complexity of your on-node IP Tables rules

User · Answer

Orabig is correct   You can bind 10 0 2 15 in Ubuntu  VirtualBox  then do a port forwarding from host to guest Ubuntu   in  etc redis redis conf  bind 10 0 2 15   then  restart redis   sudo systemctl restart redis   It shall work

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