I am getting error:
"Lost connection to MySQL server at 'reading initial communication packet, system error: 0"
while I am going to connect my db.
If I am using localhost everything is working fine.
But when I am using my live IP address like below, it's getting error:
mysql_connect("202.131.xxx.106:xxxx", "xxxx", "xxxxx") or die(mysql_error());
Someone here suggests that it might be a firewall problem:
I have just had this problem and found it was my firewall. I use PCTools Firewall Plus and it wasn't allowing full access to MySQL. Once I changed that it was fine.
Could that be it?
Also, someone here suggests that it might be because the MySQL server is bound to the loop-back IP (127.0.0.1 / localhost) which effectively cuts you off from connecting from "outside".
If this is the case, you need to upload the script to the webserver (which is probably also running the MySQL server) and keep your server host as 'localhost'
Open mysql configuration file named my.cnf and try to find "bind-address", here replace the setting (127.0.0.1 OR localhost) with your live server ip (the ip you are using in mysql_connect function)
This will solve the problem definitely.
Allow remote connect to MySQL.
Edit file:
>sudo nano /etc/mysql/my.cnf
Comment line:
#bind-address = 127.0.0.1
Restart MySQL:
>sudo service mysql restart
Create user for remote connection.
>mysql -uroot -p
CREATE USER 'developer'#'localhost' IDENTIFIED BY 'dev_password';
CREATE USER 'developer'#'%' IDENTIFIED BY 'dev_password';
GRANT ALL ON *.* TO 'developer'#'localhost';
GRANT ALL ON *.* TO 'developer'#'%';
In my case I need to connect remotely from Windows to VirtualBox machine with Ubuntu. So I need to allow port 3306 in iptables:
>iptables -A INPUT -i eth0 -p tcp -m tcp --dport 3306 -j ACCEPT
Had this problem when setting up a new slave server. Found it was the slave server IP address was missing from the master server /etc/hosts.allow file. Added the IP address and it let me connect to the master server.
Note that I use hosts.allow and hosts.deny to control access.
I had this problem and it ended up being the prior sys admin changed the port MySQL was running on. MySQL Workbench was trying to connect to the default 3306 but the server was running on 20300.
The error means that it didn't receive a response from the port it expected to find the server on. The causes range from contacting the wrong machine (For one of a number of reasons) to the server not being on the expected port.
Check which port your server is bound to in /etc/mysql/my.cnf. Does that correspond to what is in your connect statement. If they match then try connecting with mysql from the server itself and from the command line of the machine where you are running the client. If it works form one place and not another then you may have a firewall / router configuration issue.
One more reason...
I ran into an Ubuntu server where everything was customized and could not connect because of that same error.
This setting was inside /etc/ssh/sshd_config
PermitTunnel no
After turning into
PermitTunnel yes
I was able to connect remotely to my MySQL DB
The problem on my case was MySQL being bind only to the lo on linux.
in order to solve the problem i have edited the my.cnf (found at /etc/mysql/my.cnf) removing the line bind-address=127.0.0.1
this allows mysql to bind to any network interface
I just set up mysql on a windows box. I got the OP's error when trying to connect with the Navicat MySql client on the same box. I had to specify 127.0.0.1 as the host, and that got it.
localhost, or the servers actual ip address both did not work.
This error occurred to me while trying to connect to the Google Cloud SQL using MySQL Workbench 6.3.
After a little research I found that my IP address has been changed by the internet provider and he was not allowed in the Cloud SQL.
I authorized it and went back to work.
I faced the same problem. I checked and tried to set AllowTcpForwarding Yes but it was missing in my sshd_config so no help.I didn't change sshd_config or my.cnf. Make sure the ssh hostname is NOT the same with the mysql hostname(use localhost).
In workbench, choose + to add new connection and set the following:
connection method: standard TCP/IP over SSH
SSH Hostname: 192.168.0.50:22 (replace remote SSH server IP and port(optional))
SSH Username: sshuser
You can set password or add at the prompt
MYSQL Hostname: localhost or 127.0.0.1
MYSQL Server port:3306
You can set password or add at the prompt
Test connection. It should be successful then hit OK.Viola!
I ran into this exact same error when connecting from MySQL workbench. Here's how I fixed it. My /etc/my.cnf configuration file had the bind-address value set to the server's IP address. This had to be done to setup replication. Anyway, I solved it by doing two things:
create a user that can be used to connect from the bind address in the my.cnf file
e.g.
CREATE USER 'username'#'bind-address' IDENTIFIED BY 'password';
GRANT ALL PRIVILEGES ON schemaname.* TO 'username'#'bind-address';
FLUSH PRIVILEGES;
change the MySQL hostname value in the connection details in MySQL workbench to match the bind-address
The problem for me was that DNS queries were blocked by the FW within the subnet. The solution was to disable DNS lookups within MySQL.
The problem was quite stupid for me.
I used to get the same issue on AWS EC2 Ubuntu machine (MariaDB is installed locally for the time being), so I tried to make SSH tunneling, and had the same issue. So I tried to ssh tunnel over terminal:
ssh -L13306:127.0.0.1:3306 root#ip.address -i my/private/key.pem
And it told me this:
Please login as the user "ubuntu" rather than the user "root".
I changed ssh user from root to ubuntu, just like my ssh config, and it connected just fine.
So check your SSH connecting user.
I oversaw this, so this too half an hour of my time, so I hope this will be useful for you.
For me the config file was found "/etc/mysql/mysql.conf.d/mysqld.cnf" commenting out bind address did the trick.
As we can see here:
Instead of skip-networking the default is now to listen only on
localhost which is more compatible and is not less secure.
I am trying to connect my db docker container on Ubuntu 18.04, same problem.
First check your device by run nmcli dev to check if device docker0 is connected.
If it is not connected, try to restart docker service:
sudo service docker restart
I tried make a telnet over remote server on port 3306.
The error message is clear
Host 'x.x.x.x' is blocked because of many connection errors; unblock with 'mysqladmin flush-hosts'Connection closed by foreign host.
As root at server mysqladmin flush-hosts worked at all!
I had the same error when using localhost. I restarted the MySQL service and it worked fine.
in my case, I had ALL: ALL in hosts.deny. Changing this to ALL: PARANOID solved my problem when connecting over ssh
Ran into this same issue, Bind Address back and forth to no avail. Solution for me was flushing privileges.
mysql> FLUSH PRIVILEGES;
Firewalld blocks the IP address. so to give access, use these commands:
firewall-cmd --permanent --zone=trusted --add-source=YOUR_IP/32
firewall-cmd --permanent --zone=trusted --add-port=3306/tcp
firewall-cmd --reload
For me setting bind-address = 0.0.0.0 in mysql/my.cnf worked. It basically listens to all addresses (but still one port) then.
And don't forget restart your server: systemctl restart mysql
I just had the same problem, but in my case I solved it with
service mysqld start
In my case it was the university wifi blocking port 3306. I was able to connect by using a mobile hotspot.
Change to a mobile hotspot or another network, and if it works there, then you know that original network is blocking port 3306. If you get the same error on more than 1 network, then you know it's specific to your machine.
I had port 3306 in Docker container but in Dockerfile it was 33060. I edited the port in Docker container to 33060
Must have been added to the Dockerfile
ENV MYSQL_ROOT_HOST 172.17.0.1
I have done below 3 steps then working for me.
bind-address = "YOUR MACHINE IP" in my.cnf file at /etc/my.cnf
Restart service by command : service mysql restart
GRANT ALL PRIVILEGES ON yourDB.* TO 'username'#'YOUR_APPLICATION_IP' IDENTIFIED BY 'YOUR_PASSWORD' WITH GRANT OPTION;
I had the same issue installing MySQL docker image then trying to connect from WSL2 MySQL client.
As it was stated in the accepted answer that it should be a firewall issue, in my case this error was caused due to not allowing docker for windows to communicate to private network.
I changed the settings on "Firewall & network protection", "allow an app through firewall", "change settings" (need administrator rights) and allowed "Docker desktop backend" to connect to private network.
I had the same error on my Mac with a local MySQL installation. The problem was that the number files that MySQL was opening was too high for MacOS.
To see if you have the same problem you can run this command and look for File Descriptor errors:
tail -200 /usr/local/var/mysql/$(whoami).err | grep "Warning"
I added this line to my.cnf file and the problem was fixed:
table_open_cache = 200
Had the same problem, what worked for me was:
Go to Windows Firewall where you allow applications.
mysql probably won't be in the list, so you need to add it, its path is typically C:/Program Files (x86)/MySQL/bin/mysql
Mark both private and public networks, apply.
When connecting to Mysql remotely, I got the error.
I had this warning in /var/log/mysqld.log:
[Warning] IP address 'X.X.X.X' could not be resolved: Temporary failure in name resolution
I just added this line to /etc/hosts file:
X.X.X.X some_name
Problem solved! Not using skip-name-resolve caused some errors in my local app when connecting to MySQL.
I want to bind 2 certificates on a port in my Windows server.
But it doesn't let me add the second certificate once one has already been added for it. Or unless I clear the bindings for the port using netsh delete command.
Adding the second certificate shows this error -
System error 183. Cannot create file when that file already exists
netsh http add sslcert ipport=0.0.0.0:2195 certhash="$thumbprint" appid='{472f53d0-29e1-4cf4-ba9c-79f362d8f6fa}'
Is it possible to bind multiple certificate to the same port?
Thanks in advance.
I have found a solution for this. Surprisingly I didn't find a single resource about this across the web.
It seems that you can't bind multiple certificates if you set the IP as 0.0.0.0 (which I think, is wildcard)
So, for the other certificate, I had to use some other IP.
Since in my case the destination IP address is known and is fixed, which is 17.x.x.x IP address block (Apple) .
So for the second certificate, I changed the ipport in the command to 17.0.0.0:2195.
And voila, it worked!
I have successfully setup IIS on my local development machine (dev branch - setup as localdev.me) but when I went to setup another branch (hotfix - setup as localhotfix.me) I am running into issues. The issues are due to the way the site is setup. The subdomain of the url is used to determine which Database to connect to. So going to host.localdev.me will connect to the host database. So in IIS I have the following settings for the bindings of the site.
Type Host Name Port IP Address
http localdev.me 80 *
http *.localdev.me 80 *
I can ping localdev.me with any subdomain and I get the loopback address as expected. When I then setup the hotfix branch (exactly the same as the dev but with the following bindings) I get name not resolved errors.
Type Host Name Port IP Address
http localhotfix.me 80 *
http *.localhotfix.me 80 *
Is there a reason the first setup would work and not the second? What is perhaps even stranger if I tell IIS to stop I can still ping subdomains on localdev.me and get the loopback address.
I could always get it working by manually specifying the host name in my windows hosts file but I would rather not do that as I would need to go in and edit the file every time we add a new subdomain.
EDIT: These are the specific errors I am getting.
ping localhotfix.me
Ping request could not find host localhotfix.me. Please check the name and try again.
EDIT2: I have a solution that works fairly well. It requires Acrylic DNS and installation of the Microsoft Loopback Adapter. I set the loopback adapter to a valid IP Address and set the DNS server to 127.0.0.1 then edit the AcrylicHosts file to contain entries for each domain with a wildcard. Once I did all of this I was able to ping localhotfix.me along with *.localhotfix.me. I believe the reason localdev.me worked is because it is a valid domain. The name would resolve at which point I believe IIS was able to take over. But thats really just an educated guess. But kindof makes sense as to why it worked for one and not the other.
The reason *.localdev.me works without a hosts file is because the public DNS for that domain resolves to 127.0.0.1 as long as it is not localdev.me or www.localdev.me. You can check this using nslookup *.localdev.me (replace the asterisk with anything except www) while your hosts file is empty. On the other hand, *.localhotfix.me is not registered in public DNS at all, which is why you'd need a hosts file entry for those.
I'm using netsh http add urlacl url=http://devsite1:80/ user=everyone as mentioned at http://www.hanselman.com/blog/WorkingWithSSLAtDevelopmentTimeIsEasierWithIISExpress.aspx to work with 80 and 443 SSL port, but web browser can't bind my http://devsite1 local address and them, nothing work.
Should be really have set line as 127.0.0.1 devsite1 at hosts file in Windows drive etc folder?
In this link above he said:
My machine is called HANSELMAN-W500, so I'll use that name. You could update your hosts file and use a friendly name. To start, use your computer name. if you don't know the name of your computer, you're silly. Go to the command prompt and type "HOSTNAME" to find out.