ICT Kennisbank
Block incoming ip address using iptables CentOS
OPTIONS IP tables (short or long options are allowed)
--append -A Append to chain --delete -D Delete matching rule from chain --delete -D Delete rule rulenum (1 = first) from chain --insert -I Insert in chain as rulenum (default 1=first) --replace -R Replace rule rulenum (1 = first) in chain --list -L List the rules in a chain or all chains --source -s [!] address[/mask] source specification --destination -d [!] address[/mask] destination specification --jump -j target INPUT = Incoming Access OUTPUT = Outgoing Access -I = Insert -D = Delete -s = Source Ip Address -j = Target Action DROP = Block action
Add IP address (effects immediately)
syntax : iptables -I INPUT -s IP-ADDRESS -j DROP
Remove blocked IP address
syntax : iptables -D INPUT -s IP-ADDRESS -j DROPOP
List iptable rules
syntax: iptables -L -n