Re: debian server with two public IPs

From	<tomas@tuxteam.de>
Newsgroups	linux.debian.user
Subject	Re: debian server with two public IPs
Date	2023-03-20 10:30 +0100
Message-ID	<Gbk01-dLoR-5@gated-at.bofh.it> (permalink)
References	<Gbihz-dKhg-3@gated-at.bofh.it> <Gbjnj-dKVO-1@gated-at.bofh.it> <GbjQl-dLln-5@gated-at.bofh.it>
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On Mon, Mar 20, 2023 at 05:15:57PM +0800, Jeremy Ardley wrote:
> 
> On 20/3/23 16:39, Stanislav Vlasov wrote:
> > пн, 20 мар. 2023 г. в 12:33, <fh@dnsbed.com>:
> > 
> > > I have a networking question that I can't understand for.
> > > I have the Debian 11 host with two ethernet cards.
> > > There is public IP and gateway for each ethernet card.
> > > (they are public IPs from two different net address blocks.)
> > [...]
> > > When clients from outside access eth1 ip (such as HTTP access), they can
> > > reach there.
> > > But, the returned packages from debian server to clients are always
> > > coming from eth0 gw.
> > > I expect the returned package also come from eth1 gw (since clients are
> > > accessing eth1 address).
> > 
> > https://lartc.org/ will help you.
> > Exactly https://lartc.org/howto/lartc.rpdb.multiple-links.html
> > In my same setup i was add some 'up ip rule add ...' lines into
> > /etc/network/interfaces
> 
> I get the impression the problem is to send return traffic back out on the
> interface it came in on.

If this is it, then rp_filter, as I proposed elsewhere in this
thread, seems like exactly made for this.

Cheers
-- 
t

Thread

debian server with two public IPs fh@dnsbed.com - 2023-03-20 08:40 +0100
  Re: debian server with two public IPs <tomas@tuxteam.de> - 2023-03-20 09:30 +0100
  Re: debian server with two public IPs Stanislav Vlasov <stanislav.v.v@gmail.com> - 2023-03-20 09:50 +0100
    Re: debian server with two public IPs Jeremy Ardley <jeremy@ardley.org> - 2023-03-20 10:20 +0100
      Re: debian server with two public IPs <tomas@tuxteam.de> - 2023-03-20 10:30 +0100
        Re: debian server with two public IPs Jeremy Ardley <jeremy@ardley.org> - 2023-03-20 10:50 +0100
    Re: debian server with two public IPs fh@dnsbed.com - 2023-03-21 01:00 +0100
  Re: debian server with two public IPs Tim Woodall <debianuser@woodall.me.uk> - 2023-03-20 11:30 +0100

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