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General • Re: vrrp in firewall filter rules

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Is this the expected behavior? I'm not targeting the vrrp address. I'm browsing general Internet.

So, it works, but it doesn't match what I'm reading (although I can't find too much).

Why is it matching the vrrp interface instead of the actual vlan interface?

Yes, it is an expected behavior from a MIKROTIK point of view.

From a Linux perspective, VRRP is a sub-interface with his own mac-address (VMAC).
Packets that need to be forwarded would be delivered to the VMAC - and VIP.

Example with iproute2:

Code:
modprobe macvlan[ $? -eq 0 ] && ip link add link eth0 name vrrp4.1 type macvlan mode bridge[ $? -eq 0 ] && ip a add 10.0.0.1/32 dev vrrp4.1[ $? -eq 0 ] && ip link set dev vrrp4.1 up[ $? -eq 0 ] && tcpdump -i vrrp4.1 -vn


As per MIKROTIK configuration, If you want to manage a VIP from the VLAN interface, you should attach it manually; which is obviously not VRRP.

Some open source VRRP implementations, like keepalived, offer the possibility to avoid VMAC and just install VIP into the base interface - but also in this case this would not respect the standard.



Hope that helps

Statistics: Posted by nstp — Fri Feb 02, 2024 7:19 am



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