Block port 25 for a Kvm VM on server

Question

I need to know how to block port 25 for a VM on a KVM server using ebtables or firewalld service . VM has interface name viifv3035 on the server and brctl shows this:

# brctl show
bridge name     bridge id               STP enabled     interfaces

viifbr0         8000.448a5b847b85       no              eth0
                                                        viifv3035

score 0 · Answer 1 · answered Feb 27 '19 at 08:43

Short answer, you can't with ebtables,

It handle only level 2 networking (ie ethernet)

See : http://ebtables.netfilter.org/documentation/can.html http://ebtables.netfilter.org/documentation/cant.html

You need to use iptables for blocking a TPC port.

Block port 25 for a Kvm VM on server

1 Answers1