iptables - ufw firewall DROP icmp from ALL to a specific IP address on my server -


my server has apache2 on single interface multiple ips on sub-interfaces. want reject icmp echo request external ips specific ip assigned 1 of sub interfaces allow icmp other ips on same interface:

  1. eth2 - 10.128.20.252
  2. eth2:1 - 10.128.20.11
  3. eth2:2 - 10.128.20.12
  4. eth2:3 - 10.128.20.13 <-want block icmp ip
  5. eth2:4 - 10.128.20.14

edit /etc/ufw/before.rules file , change ip suit needs. do:
# ufw reload

put before icmp ok codes section, works

drop icmp specific ip

-a ufw-before-input -p icmp --icmp-type echo-request -d 10.128.20.13 -j reject


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