Knowing how to Whitelist and Blacklist IPs in your firewall can be very important when you want to allow or deny connection to your server, based on an IP address. Below we will cover how to allow and deny connections from IPs in IP Tables, Firewalld, and UFW. IPTables: Allowing or Denying connections from IPs ..
Category : Iptables
# iptables -L -n # iptables -L -n | ..
Add the clean IP to the server. Edit the firewall to NAT all connections FROM port 25 to use the new IP. # iptables -t nat -A POSTROUTING -p tcp –dport 25 -j SNAT –to-source NEW.IPA.DDR.ESS # service iptables save Ensure that the IP is on eth1 or… # iptables -t nat -A POSTROUTING -o ..
I have just intalled apache on a fresh CentOS 6.5 installation. I entered the ip address in the browser address bar, and it failed to connect. I then turned off iptables, and refeshed, and this time I could connect. So clearly iptables is blocking the http (port 80) traffic. So I looked at the iptables ..
Block Incoming Request From IP 1.2.3.4 The following command will drop any packet coming from the IP address 1.2.3.4: # /sbin/iptables -I INPUT -s {IP-HERE} -j DROP # /sbin/iptables -I INPUT -s 1.2.3.4 -j DROP Finally, the last thing we need to do is save our rules so that next time we reboot our computer ..
Is an IP blocked? # iptables –list -n | grep 7..
To stop Spam: drop SMTP on port 25, 465 and 587 to prevent further spam from being sent out by running the following commands: # /sbin/iptables -A INPUT -p tcp –dport 25 -j DROP # /sbin/iptables -A OUTPUT -p tcp –dport 25 -j DROP # /sbin/iptables -A INPUT -p tcp –dport 465 -j DROP # ..
on cpanel, use iptables -A cP-Firewall-1-INPUT -s 203.90.xxx.x..
How to add an IP to access the plesk panel and ssh Open flle /etc/sysconfig/iptables: # nano /etc/sysconfig/iptables -A INPUT -s 72.177.xxx.xxx/32 -p tcp -m tcp –dport 8443 -j ACCEPT -A INPUT -s 66.226.xx.xx/32 -p tcp -m tcp –dport 10222 -j ACCEPT Save and restart iptables service iptabl..
