How to enable/disable ssh login through putty

Some time you may want to disable login through putty by the port 22 SSH. You have to reboot the pc after disable sshd. Then add the firewall ports. Start listener. Restart tomcat and start Apache.

Step 1 : Enable or disable sshd in vultr.com console after login

---- systemctl enable sshd

systemctl disable sshd

Step 2 : Restart the server.

init 6

Step 3 : Add firewall rules:

firewall-cmd --zone=public --add-port=80/tcp

firewall-cmd --zone=public --add-port=443/tcp

firewall-cmd --zone=public --add-port=1510/tcp

firewall-cmd --zone=public --add-port=1539/tcp

Step 3: Start listener :

. /u01/app/oracle/product/11.2.0/xe/bin/oracle_env.sh

lsnrctl start

Step 4 : Restart tomcat :

cd /usr/local/tomcat/bin

./shutdown.sh 

./startup.sh

Step 5 : Start Apache :

sudo systemctl start httpd