How Block DHCP in Bridge betwen two interfaces

sequephonic · September 4, 2019, 4:14am

Hi!
A have CCR1009-7G-1C-1S+

ether2 and ether3 in bridge.

How can i block DHCP broadcast from ether2 to ether3 throught Bridge Filters?

JoeTim · September 4, 2019, 6:58am

Take a look at following discussion threads.
http://forum.mikrotik.com/t/blocking-dhcp-with-bridge-firewall/92079/1
https://aacable.wordpress.com/2013/02/22/howto-block-dhcp-traffic-via-mirkotik-bridge/

sequephonic · September 4, 2019, 7:47am

I have DHCP server in ether2 network and other DHCP server in ether3 network.
But i need ether2 <=> (Block DHCP Broadcast) <=> ether3.

JohnTRIVOLTA · September 4, 2019, 8:31am

/interface bridge filter
add action=drop chain=forward dst-mac-address=FF:FF:FF:FF:FF:FF/FF:FF:FF:FF:FF:FF dst-port=67 ip-protocol=udp mac-protocol=ip out-interface=ether2
add action=drop chain=forward dst-mac-address=FF:FF:FF:FF:FF:FF/FF:FF:FF:FF:FF:FF dst-port=67 ip-protocol=udp mac-protocol=ip out-interface=ether3

If you have more than one bridge you can add in the rules out-bridge=XXXXXX too !

sequephonic · September 4, 2019, 8:47am

Yes! This Help me!

sequephonic · September 4, 2019, 8:51am

thanks for the help.

JohnTRIVOLTA · September 4, 2019, 10:06am

You welcome