rfc 1812 third party address on traceroute

Mon Jun 6 02:55:06 UTC 2016

I'm assuming you'd like this behavior on EdgeOS changed? I know a guy...
On Jun 5, 2016 8:41 PM, "Randy Bush" <randy at psg.com> wrote:

> > is anyone seeing the dreaded rfc1812 behavior in a citable fashion?  how
> > common is it?
>
> we verified that the juniper and cisco platforms we tested replied with
> the source address being the ingress interface.  this is, imiho, good.
>
> a kind soul actually sent citable tests
>
> > At least my MikroTik RB850Gx2, running 'latest stable' (RouterOS
> > v6.32.2) replies with the outbound interface, not the inbound.
> >
> > I'd assume this is because by default, icmp_errors_use_inbound_ifaddr in
> > linux is disabled, and they haven't changed the default.
> >
> > No idea if that can be tweaked in the weird maze of mikrotik config
> options.
>
> and from the same kind engineer
>
> > And just to add even more inconsistency, I checked on my Ubiquiti
> > EdgeMax (a VyOS fork) which does let me check the state of sysctls:
> >
> > router:/etc/sysctl.d$ cat 30-vyatta-router.conf
> > <snip>
> > # Send ICMP responses with primary address of exiting interface
> > net.ipv4.icmp_errors_use_inbound_ifaddr=1
> > </snip>
> >
> > So someone in Vyatta decided to explictly set this to be enabled.
>
> so one win and one loss
>
> randy
>