private public ftp server hostname centos

#Private public ftp server hostname centos how to#
#Private public ftp server hostname centos update#

Similarly, blocking a UDP port will follow the same syntax: $ sudo firewall-cmd -remove-port=53/udp -permanent $ sudo firewall-cmd -remove-port=22/tcp -permanent To block a TCP port, like port 22, run the command. The -permanent flag ensures that the rules persist even after a reboot. Similarly, to add a UDP port, specify the UDP option as shown: $ sudo firewall-cmd -add-port=53/udp -permanent Note that you have to specify whether the port is a TCP or UDP port after the port number: $ sudo firewall-cmd -add-port=22/tcp -permanent To add a port, say port 443 for HTTPS, use the syntax below. Once done with the configurations, always ensure that you reload the firewall for the new rules to take effect. Firewalld allows you to add and block ports, blacklist, as well as whitelist IP, addresses to provide access to the server. Now that we have firewalld running, we can go straight to making some configurations. Check Firewalld Status Configuring Rules using Firewalld

#Private public ftp server hostname centos how to#

You now know how to modify server hostname from SSH terminal in CentOS server.The output below confirms that the firewalld service is up and running. To verify, you can run the hostname command discussed in the beginning of the tutorial: hostname The hostname will now be changed to the value entered for ' NEW_HOSTNAME'. Now, to change the hostname of the server, login via SSH and run the following command, replacing ' NEW_HOSTNAME' with the new server hostname: sysctl kernel.hostname=NEW_HOSTNAME To utilize this method, use the following procedure.įirst, to check the current hostname of the server, login via SSH and run the following command: sysctl kernel.hostname

You can use sysctl to change the variable kernel.hostname on CentOS server. So in order to preserve your change on system reboot edit this file and enter the appropriate name using the HOSTNAME variable. This is set using the init script /etc/rc.d/rc.sysinit /etc/sysconfig/network RedHat based systems use the file /etc/sysconfig/network to read the saved hostname at system boot. You will most probably need to exit the current shell in order to see the change in your shell prompt. This is active right away and will remain like that until the system will be rebooted (because at system boot it will set this from some particular file configurations – see bellow how to set this permanently). When followed by normal text string (such as ' NEW_NAME' above), hostname command will set the hostname of the system to NEW_NAME. With the -fqd argument, hostname will output the fully qualified domain name (or FQDN) of the system. Without any parameters, it will output the current hostname of the system. Here are some quick uses of the hostname command: hostname On any Linux system, the hostname can be checked and modified using the ‘ hostname’ command. In computer networking, a 'hostname' is a label that is assigned to a device connected to a computer network and that is used to identify the device.

#Private public ftp server hostname centos update#

You can use the steps below to change the hostname of a running system and update the server configuration with the new hostname details. This article provides a guide to modify server Hostname using SSH in CentOS server.