Redhat 8.0 limit source connection

Yes this can be done with iptables. It is possible to do the restrictions globally or per interface. A simple example of doing this might look like:
#!/bin/sh
#
# This is a simple, reasonably complete local host based firewall suitable for
# protecting a server that might be exposed to malicous activity.
#
# Save this in root's home directory as iptables-gw and make it executable
# with 'chmod +x iptables-host'. Then to install the rule set simply run it
# with './iptables-host'.
#
# Once the rule sets are to your liking you can easily arrange to have them
# installed at boot on a Redhat box (7.1 or later). Save the rules with:
#
# service iptables save
#
# which saves the running ruleset to /etc/sysconfig/iptables. When
# /etc/init.d/iptables executes it will see the file and restore the rules.
#
# I find it easier to modify this file and run it to change the rulesets,
# rather than modifying the running rules. That way I have a readable
# record of the firewall configuration.
#
# Author: Jim Levie (jim@entrophy-free.net)
#
# Set an absolute path to IPTABLES and define my IP.
#
IPT="/sbin/iptables"
IP1=10.0.0.1
#
# Clear out any existing firewall rules, and any chains that might have
# been created. Then set the default policies.
#
$IPT -F
$IPT -F INPUT
$IPT -F OUTPUT
$IPT -F FORWARD
$IPT -F -t mangle
$IPT -F -t nat
$IPT -X
$IPT -P INPUT DROP
$IPT -P OUTPUT ACCEPT
$IPT -P FORWARD ACCEPT
#
# Begin setting up the rulesets. First define some rule chains to handle
# exception conditions. These chains will receive packets that we aren't
# willing to pass. Limiters on logging are used so as to not to swamp the
# firewall in a DOS scenario.
#
# silent       - Just dop the packet
# tcpflags     - Log packets with bad flags, most likely an attack
# firewalled   - Log packets that that we refuse, possibly from an attack
#
$IPT -N silent
$IPT -A silent -j DROP

$IPT -N tcpflags
$IPT -A tcpflags -m limit --limit 15/minute -j LOG --log-prefix TCPflags:
$IPT -A tcpflags -j DROP

$IPT -N firewalled
$IPT -A firewalled -m limit --limit 15/minute -j LOG --log-prefix Firewalled:
$IPT -A firewalled -j DROP
#
# These are all TCP flag combinations that should never, ever, occur in the
# wild. All of these are illegal combinations that are used to attack a box
# in various ways.
#
$IPT -A INPUT -p tcp --tcp-flags ALL FIN,URG,PSH -j tcpflags
$IPT -A INPUT -p tcp --tcp-flags ALL ALL -j tcpflags
$IPT -A INPUT -p tcp --tcp-flags ALL SYN,RST,ACK,FIN,URG -j tcpflags
$IPT -A INPUT -p tcp --tcp-flags ALL NONE -j tcpflags
$IPT -A INPUT -p tcp --tcp-flags SYN,RST SYN,RST -j tcpflags
$IPT -A INPUT -p tcp --tcp-flags SYN,FIN SYN,FIN -j tcpflags
#
# Allow selected ICMP types and drop the rest.
#
$IPT -A INPUT -p icmp --icmp-type 0 -j ACCEPT
$IPT -A INPUT -p icmp --icmp-type 3 -j ACCEPT
$IPT -A INPUT -p icmp --icmp-type 11 -j ACCEPT
$IPT -A INPUT -p icmp --icmp-type 8 -m limit --limit 1/second -j ACCEPT
$IPT -A INPUT -p icmp -j firewalled
#
# The loopback interface is inheritly trustworthy. Don't disable it or
# a number of things will break.
#
$IPT -A INPUT -i lo -j ACCEPT
#
# Now allow Internet hosts access to those services we provide. Note that
# enabling inbound FTP 20 & 21 tcp will also require allowing ports
# 1024-65534/tcp. Which in itself is good enough reason not to allow FTP
# connections and to only allow ssh/scp/sftp.
#
# Allow ssh from anywhere to this server
#
$IPT -A INPUT -p tcp -s 0/0 --dport 22 -j ACCEPT
#
# HTTP access from anywhere
#
$IPT -A INPUT -p tcp -s 0/0 --dport 80 -j ACCEPT
$IPT -A INPUT -p tcp -s 0/0 --dport 443 -j ACCEPT
#
# Allow access to SMTP only from a single node
#
#$IPT -A INPUT -p tcp -s 10.0.0.33 --dport 25 -j ACCEPT
#
# If there are trusted nodes you can allow then access to everything with
# something like this. Be sure to set IP at the top of this script if you enable one
# of these.
#
#$IPT -A INPUT -s 10.0.0.0/24 -d $IP1 -j ACCEPT
#$IPT -A INPUT -s 10.0.0.2 -d $IP1 -j ACCEPT
#
# Allow packets that are part of an established connection to pass
# through the firewall. This is required for normal Internet activity.
#
$IPT -A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
#
# Anything not already matched gets firewalled and logged.
#
$IPT -A INPUT -j firewalled