Hi, I've never tried this with openvpn, but there is a --passtos option which sets the TOS field of the tunnel packet to what the payload's TOS is. I've done this sort of thing before with GRE tunnels. They have an inherit option. Russell -----Original Message----- From: lartc-owner@xxxxxxxxxxxxxxx [mailto:lartc-owner@xxxxxxxxxxxxxxx] On Behalf Of Gonçalo Luiz Sent: Thursday, 8 January 2015 7:40 PM To: lartc@xxxxxxxxxxxxxxx Subject: Help setting up home router Hi, I've been reading all the material I could get my hands on, but there is a small detail I seem unable to get my head around. Let me show you my setup first 1 linux PC (router) with two physical NICs: eth0 (inner facing) and eth1 (outer facing) many clients behind a switch to where eth0 connects to three network namespaces in the router, whose veths bridge with eth0 in br0 one OpenVPN VPN running on the router, through which I'm sending some traffic originating from a few source IPs. Let's call it tun0 what I want to do: apply traffic control to the outer facing, controlling *all* the outgoing traffic. For simplicity let's assume I want to apply the rules based solely on the source IP my first instinct was to configure the qdiscs on eth1 egress. Seems to me that this is the only way I can also apply the control to packets originating in the router as they go straight away to the exit interface (eth1). The problem I'm facing is that the traffic that goes through tun0 presents itself to eth1, obviously, already compressed and without the real source IP information (can come from any of the clients or network namespaces on the router) and therefore I cannot infer what class should assign to it. In practice, VPN turns all it's traffic opaque and I cannot treat it differently depending on the client originating it. my second instinct was to shape tun0 ingress (through an IFB) along with eth0 egress by redirecting both to an IFB and shapping it there. Sadly this leaves traffic originating in the router itself out. lastly I've tried to add an iptables mark to the packets that are going through tun0 before they go through the compressing process but it seems to be lost when they come out of the other side of it. If they were not perhaps I could apply traffic control based on iptables marks instead of source IPs if I marked all the packets as soon as they land on the router or are originated in the router. Any ideas? I fell this must be possible but am running out of ideas. Thanks. Gonçalo Gonçalo Luiz -- To unsubscribe from this list: send the line "unsubscribe lartc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html ��.n��������+%������w��{.n����j�\�)�� jg��� �����ݢj����G���� ���j:+v���w�m������w�������h�����٥
