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Tag Archives: telnet

telnet command to check port access

telnet is a common tool used by sysadmins to check if a particular port is open or not on a remote server. Sometimes you may have problems in sending or receiving emails. The first step in troubleshooting the issue would be to first check the port access directly via telnet. Ports may be closed/blocked by  Full Article…


Disable port 3306 listening to server

  Here goes the steps for disabling inbound MySQL connections to a linux server. ♦ Login to the server as root ♦ open the file /etc/my.cnf ♦ add the directive skip-networking ♦ save and quit from the file. Now you may need to disable the port 3306 in TCP_IN section in firewall(if firewall enabled). Make  Full Article…