[lvs-users] Reroute SYN packet when it could not be delivered to the backend

Graeme Fowler graeme at graemef.net
Fri Apr 13 09:32:22 BST 2018

On 12 Apr 2018, at 15:28, kay <kay.diam at gmail.com> wrote:
> I have a special use case for the Direct Routing (DR) mode.
> Is there a possibility to reroute SYN packets, when they can not be
> delivered to the backend? It could be easily detected by several SYN
> packets being sent.

Firstly, please susbcribe to the list so your messages don’t get held for moderation.

To answer your question: you need an extra application to do this. There are several, but I’d suggest you look at keepalived as a first option.

There was much discussion many years ago (20 or so) about putting realserver/backend monitoring into IPVS, but it was felt at the time that this wasn’t a kernel function and should be handled by a userspace application. That still applies today.


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