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alpine-devel

Re: [alpine-devel] route caches..... help !!!

From: Timo Teras <timo.teras_at_iki.fi>
Date: Fri, 20 Sep 2013 15:08:13 +0300

On Fri, 20 Sep 2013 15:01:56 +0300
HL <freemail.grharry_at_gmail.com> wrote:

> On 20/09/2013 02:47 μμ, Timo Teras wrote:
> > On Fri, 20 Sep 2013 14:38:28 +0300
> > HL <freemail.grharry_at_gmail.com> wrote:
> >
> >> I need some help here ...
> >>
> >> I am running alpine linux 2.6.4 64bits
> >>
> >> 3.10.10-1-grsec #2-Alpine SMP Tue Sep 3 07:05:53 UTC 2013 x86_64
> >> Linux ip utility, iproute2-ss130430
> >>
> >> The command
> >> ip route show cache
> >> show no caches at ALL ...
> >>
> >> Is it just me ?
> >> Did something got changed in the kernel or utils ???
> >>
> >> Do I need to adjust some kerne vars ???
> > Kernel changed. The routing cache was removed from linux kernel,
> > thus no cached routes exists anymore there.
> >
> > You can still check what would be the used data via
> > ip route get <ip-to-target>
> >
> > And it looks like cached route - but is calculated on demand.
> >
> Thank's Timo ...
>
> That's bad news ...
> This explains the problem in udp ( ie openvpn udp mode ) connections
> and multihome setups :-(

You still have netfilter's connection tracking cache that is udp/tcp
flow based. Any iptables rules you use to do per-flow type of things,
will still work.

- Timo


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Received on Fri Sep 20 2013 - 15:08:13 GMT