![]() Also, make sure you replace database name and schema name with the appropriate names in your database. Replace secure password with your own secure password, which can be different from the SSH password. GRANT CONNECT ON DATABASE TO rjmetric WITH PASSWORD GRANT USAGE ON SCHEMA TO rjmetric GRANT SELECT ON ALL TABLES IN SCHEMA TO rjmetric ALTER DEFAULT PRIVILEGES IN SCHEMA GRANT SELECT ON TABLES TO rjmetric The user should also own the schema that MBI is being granted access to. Your organization may require a different process, but the simplest way to create this user is to execute the following query when logged into Postgres as a user with the right to grant privileges. In these cases, it is necessary to run a command like AllowUsers to allow the rjmetric user access to the server. If the sshd\_config file associated with the server is not set to the default option, only certain users have server access - this prevents a successful connection to MBI. ![]() To finish creating the user, alter the permissions on the /home/rjmetric directory to allow access via SSH:Ĭhown -R rjmetric:rjmetric /home/rjmetric.Touch /home/rjmetric/.ssh/authorized_keys Remember the public key you retrieved in the first section? To ensure that the user has access to the database, you need to import the key into authorized\_keys.Ĭopy the entire key into the authorized\_keys file as follows: To add the new user, run the following commands as root on your Linux server:.You may restrict this user any way you like, as long as it retains the right to connect to the PostgreSQL server. This can be a production or secondary machine, as long as it contains real-time (or frequently updated) data. See the blue box in the GIF above? That is it! Creating a Linux user for MBI It is 54.88.76.97/32, but it is also on the PostgreSQL credentials page. If you are a bit lost, this is how to navigate through MBI to retrieve the key:įor the connection to be successful, you must configure your firewall to allow access from your IP address. Leave this page open throughout the tutorial - you will need it in the next section and at the end. The public key is located underneath this form.After the PostgreSQL credentials page opens, set the Encrypted toggle to Yes. ![]() Go to Manage Data > Connections and click Add a Data Source.In the next section, you will create the user and import the key. ![]() The public key is used to authorize the MBI Linux® user. It is not as complicated as it might sound. Enter the connection and user info into MBI.This is different from a VPN because it does not intercept all traffic, and each application that wishes to use the proxy has to explicitly route the traffic to the local port.To connect your PostgreSQL database to MBI via an SSH tunnel, you (or your team, if you are not a techie) must do a few things: You can now reach the entire network of servers through port 8888 (you can send any type of traffic, directed to any port to any host). You can configure your browser for example to send its traffic through a SOCKS tunnel using this guide. $ ssh -i ~/.ssh/jump_id_rsa -D 8888 creates a SOCKS proxy on port 8888. When a client connects to this port (your web browser, for example), the connection is forwarded to the jump host, which is then forwarded to a dynamic port on any destination machine. Luckily the -D flag allows you to turn your SSH client into a rudimentary SOCKS proxy server. However setting up local port forwarding for each and every server is a tedious process, and we would rather tell our web browser to route traffic through the bastion for all our traffic. We don’t have access to that network, but somebody set up a bastion host for us which we can use as a proxy. Scenario: you want the remote server to access specific application running on your local machine (which listens on a specific port)įor example, we might have a lot of machines running webservers which are only accessible from a campus network. We can now reach the database on the private subnet through port 8888 on localhost, e.g.: $ psql -W -h localhost -p 8888 postgres postgres Remote Port Forwarding $ ssh -i ~/.ssh/jump_id_rsa -L 8888:server:5432 our case we have forwarded port 8888 of our machine to the port 5432 of the remote server running PostgreSQL. Whenever a connection is made to this port, it will be forwarded to the secure channel. This is similar to what the Prox圜ommand in the previous section was doing, except instead of us sending data through the stdin, SSH will allocate a socket to listen to the port on the local side. The -L option is used to tell SSH that it should forward traffic from any port on our machine through the jump host and to a port on of the destination server. For example (as in the image) we might want to connect to a PostgreSQL database application that is listening on port 5432 on the remote server, which is in a private subnet.
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