How to connect database to online service

mrjj

@Thank-You
Hi
try with port 3306.

You are using port 8080 for
db.setPort(8080);

but is that not the port the web server uses ?
so while 192.168.100.4:8080/phpmyadmin Works, that is the port the web server answers
and not to mysql clients.

Also make sure port 3306 is not blocked by windows firewall.

https://dev.mysql.com/doc/mysql-port-reference/en/mysql-ports-reference-tables.html

Thank You

@mrjj
Yes, I actually got success after seeing this thing for almost day.

   db.setDatabaseName("users");
   db.setPort(9906);
// It  is 9906 because I changed from 3306 to 9906 before some time due to some errors
   db.setHostName("192.168.100.4");
   db.setUserName("host");
   db.setPassword("");

I first did what you said

changed to 9906(port)

And I got the error

Then I created new privileges to all address

Now It's finally done!

Ok I made it work but Are there security risks in this situation(simple only) ?
Another question for you

Will private IP change overtime.

If so there will be problem because the database won't be hosted if IP changes.
Am I right?. Or
It will be hosted on the same port?

mrjj

Hi

Ok I made it work but Are there security risks in this situation(simple only) ?

Depends on what you did. if you allowed this port in the firewall on the internal network/pc
its ok. That's how one normally allows new traffic on a port.

Will private IP change overtime.

Yes. if done by the local DHCP server then yes unless some IT dude promised you
it would not. You can be lucky that it will get the same IP for a long time.

If so there will be problem because the database won't be hosted if IP changes.

well if the IP changes then the clients cant find the server anymore.

But I don't know your LAN. if it's not a home setup then you most likely also have a DNS server and that means you can use a name instead of an IP. the DNS server will then translate the name to the Ip and hence
the actual IP is no longer important.

It will be hosted on the same port?

Yes unless you change it yourself, port remains the same.

Thank You

@mrjj

if it's not a home setup then you most likely also have a DNS server

It's home server. A router that we use for normal purpose.
With this I want to host this database to other users connected to the same router.

jsulm

@Thank-You said in How to connect database to online service:

A router that we use for normal purpose

Depending on the router you can assign static IPs to network devices.

mrjj

It's home server. A router that we use for normal purpose.

Ok. you can most likely make it assign a fixed ip to the server so it never changes.
If it cant directly, you can often change the range of ips it will give out and
then use an ip outside of this range and hence keep it.

With this I want to host this database to other users connected to the same router.

Wait ? from outside ? Like from the internet ?

SGaist

@Thank-You said in How to connect database to online service:

Then I created new privileges to all address

Depending on how you did that you allowed user from anywhere to connect to your database which might not be what you want.

Thank You

@SGaist

PRIVILEGES ON *.* FROM 'host'@'%';

It is shown while I was updating
I am sorry I did it with PHPMYADMIN So I don't know syntax much of this thing

CREATE USER 'demo'@'%' IDENTIFIED VIA mysql_native_password USING '***';
GRANT ALL PRIVILEGES ON *.* TO 'demo'@'%' REQUIRE NONE WITH GRANT OPTION MAX_QUERIES_PER_HOUR 0 MAX_CONNECTIONS_PER_HOUR 0 MAX_UPDATES_PER_HOUR 0 MAX_USER_CONNECTIONS 0;
GRANT ALL PRIVILEGES ON `users`.* TO 'demo'@'%';

I recreated another one for showing.

Thank You

@mrjj said in How to connect database to online service:

Wait ? from outside ? Like from the internet ?

No, Just within the network only.
Like how you use WIFI. (Available to only peoples in the LOCAL NETWORK)

If you didn't understand this,
Let me give an example

Suppose I am connected to the WIFI(router). And you are also connected to the same wifi. I have hosted the database. You can use this database only if you are connected to the same wifi/router that I have hosted into. You are not allowed to access this outside of this network. If you get disconnected with network I won't be able to connect with it.

I hope you understands

mrjj

@Thank-You
Ah
Ok super. That will work fine then.
Yes I understand fully :)

If you know the 10 clients pc. you can take their mac address and
tell the router to only allow those MAC addresses to the MySQL port.
That will block all others-

Thank You

@mrjj

well if the IP changes then the clients cant find the server anymore.

As you said this, So I allowed every IP. It can change at anytime

tell the router to only allow those MAC addresses to the MySQL port.

I didn't found any place to write MAC address here.

Some people on the network (other that people accessing the database can still access the internet and any things)

OR
Do you mean to block other MAC address(other than 10)

Thank You

@mrjj

tell the router to only allow those MAC addresses to the MySQL port.

Oh! maybe I didn't understand it.

Do you mean giving access to certain mac address in ROUTER itself?

Something like these
https://www.snbforums.com/threads/how-to-restrict-open-port-access-to-certain-mac-addresses.7528/
https://community.cisco.com/t5/switching/limit-ports-access-for-particular-mac-addresses-only/td-p/723845

mrjj

@Thank-You
Hi
Yes in the router.
so only the approved one can access the server. and not anyone on the same network.
If it makes sense ofc.

Thank You

@mrjj
If I use only one router I will do as you said
I am thinking of using new router just for this purpose. And giving connection to only very specific device. So it will be faster and easier also.

Thank You

This is Just answer compiled from all answers here.
Special thanks to @mrjj and @SGaist

Each app is a mysql client so each would have its own connection to the DB. a JS "app" would be running at a server and that server is the mysql client for all
browsers showing the pages.
Xampp is great but does your local server also need a web server?

ONE WAY IS

The easiest way to have a server is a virtual one.
One way is to use dockers.
https://www.docker.com/
and then download a predefined setup
https://hub.docker.com/r/mysql/mysql-server

Another WAY IS

For configuring Xampp for hosting

Go to Your XAMPP Control panel
Click on apache > config > Apache (httpd.conf)
Search for Listen 80 and replace with Listen 8080
After that check your local ip using ipconfig command (cmd console)
Search for ServerName localhost:80 and replace with your local ip:8080 (ex.192.168.1.156:8080)
After that open apache > config > Apache (httpd-xampp.conf)

Search for

   <Directory "C:/xampp/phpMyAdmin">
       AllowOverride AuthConfig
       **Require local**   Replace with   **Require all granted**
       ErrorDocument 403 /error/XAMPP_FORBIDDEN.html.var
   </Directory>```

Go to xampp > config > click on service and port setting and change apache port 8080
restart xampp
then hit your IP:8080 (ex.192.168.1.156:8080) from another computer

In any case, you have to take another thing into account, if you want to connect to your database through the internet, you should really consider implementing a proper service that will shield the database from the internet.

If You get this error Then You have got the privileges problem

Create new privileges with All accessed or certain IP

CREATE USER 'demo'@'%' IDENTIFIED VIA mysql_native_password USING '***';
GRANT ALL PRIVILEGES ON *.* TO 'demo'@'%' REQUIRE NONE WITH GRANT OPTION MAX_QUERIES_PER_HOUR 0 MAX_CONNECTIONS_PER_HOUR 0 MAX_UPDATES_PER_HOUR 0 MAX_USER_CONNECTIONS 0;
GRANT ALL PRIVILEGES ON `users`.* TO 'demo'@'%';

try with port 3306.

You are using port 8080 for
db.setPort(8080);

but is that not the port the web server uses ?
so while 192.168.100.4:8080/phpmyadmin Works, that is the port the web server answers
and not to mysql clients.

Also make sure port 3306 is not blocked by windows firewall.

Will private IP change overtime.

Yes. if done by the local DHCP server then yes unless some IT dude promised you
it would not. You can be lucky that it will get the same IP for a long time.

If so there will be problem because the database won't be hosted if IP changes.

well if the IP changes then the clients cant find the server anymore.

Be Happy , You are done now 🤘🤘