Redis cannot connect to the server through port 6379

Hello everyone , I meet you again , I'm your friend, Quan Jun .

I saw a lot of solutions on the Internet , It's all about ports , take 127.0.0.1 Change it to 0.0.0.0, Just ok 了 , But my problem is not the port problem , The port itself is 0.0.0.0. Actually redis There are only a few possibilities that you can't connect to the database , A firewall , Security group , password , binding IP. This time the problem is still puzzling , You can change the port number , Default port 6379 Just not .

Check the firewall in order , Security group , password , The configuration file , After confirming that there is no problem , Start again redis, The server is still accessible , Local telnet Can't connect . This problem is much like firewall and binding IP Why .

So I checked again firewall A firewall （firewall-cmd –state） and iptables（service iptables status） A firewall , The first thing I see is firewall The firewall is not running

, Check again iptables The state of the firewall

The meaning of this sentence is , Can't find iptables, That is because of the system version , Already by firewall The firewall took over . That's natural It is no longer considered because of the firewall , Result in unable to connect to the server . But this is where the egg hurts , When using iptables -L -n View the set iptables The rules , It has security group rules , My mind is in a mess .

The port numbers in the above result display range can only be accessed locally ,6379 Naturally, it can not be accessed . It's easy to know why , Use it directly

iptables -F

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Make these rules clear , Again using

iptables -L -n

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see , There are no rules , Use telnet Test server port number , It can also be connected normally . The most incomprehensible part of this is why iptables Firewall does not exist , There are still its rules .

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