SSH PORT CHANGE and BLOCK PORT SCANNING on Linux Ubuntu 18.04
In this video you will learn how to enable SSH Root login and then change SSH Port and also Block Port Scanning.
The Commands used in this tutorial are as follows.
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Enable Root Login: and change SSH PORT
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vi /etc/ssh/sshd_config
change port 22 to any desired port
port 62223 (example)
search for PermitRootLogin then
PermitRootLogin yes
systemctl restart sshd.service
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For Block Port Scanning
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apt-get update
apt-get install psad
vi /etc/rsyslog.conf
Add the following line.
kern.info |/var/lib/psad/psadfifo
/etc/init.d/rsyslog restart
vi /etc/psad/psad.conf
change the hostname
/etc/init.d/psad restart
iptables -A INPUT -j LOG
iptables -A FORWARD -j LOG
ip6tables -A INPUT -j LOG
ip6tables -A FORWARD -j LOG
psad -R
psad --sig-update
psad -H
/etc/init.d/psad restart