> It makes no difference. These settings are about ARP
(L2->L3,translation) and multiple interfaces in the
> same network.
So strange. I thought that it is for multiple interfaces ...

> That would make more sense for security. However, it's not a simple thing
> to implement as peer associations use the server sockets too, so there
> would need to be some code selecting the right socket.
Maybe it is worth looking at NTP sources for aspects of the topic.
It supports multiple bindings as I know.

> My recommendation is to run multiple instances of chronyd, each bound
> to a different interface.
I will try to use it but as a temporarily solutiononly  if I  am able to
launch it.


I believe you will be able to implement correctly the functionality.
And will wait for the version to test it.



вт, 5 сент. 2023 г. в 15:57, Miroslav Lichvar <mlich...@redhat.com>:

> On Tue, Sep 05, 2023 at 03:44:35PM +0300, CpServiceSPb wrote:
> > Due to Weak ES mode in Linux OSes, please remake a test but change a
> little
> > bit test conditions:
> > When aiming for Strong ES Model in Linux, you'll first need these sysctl
> > settings:
> > net.ipv4.conf.all.arp_filter=1
> > net.ipv4.conf.all.arp_ignore=1 # or even 2
> > net.ipv4.conf.all.arp_announce=2
>
> It makes no difference. These settings are about ARP (L2->L3
> translation) and multiple interfaces in the same network.
>
> > *And I see the only way is to implement not bindaddress but binddevice
> > available multiple times for listening and receiving requests to.*
>
> That would make more sense for security. However, it's not a simple thing
> to implement as peer associations use the server sockets too, so there
> would need to be some code selecting the right socket.
>
> My recommendation is to run multiple instances of chronyd, each bound
> to a different interface.
>
> --
> Miroslav Lichvar
>
>
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