From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from firstgate.proxmox.com (firstgate.proxmox.com [212.224.123.68]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by lists.proxmox.com (Postfix) with ESMTPS id BABF87155B for ; Thu, 8 Apr 2021 10:40:35 +0200 (CEST) Received: from firstgate.proxmox.com (localhost [127.0.0.1]) by firstgate.proxmox.com (Proxmox) with ESMTP id B70B6184EA for ; Thu, 8 Apr 2021 10:40:05 +0200 (CEST) Received: from jack.fr.eu.org (equ57-h01-128-78-42-217.dsl.sta.abo.bbox.fr [128.78.42.217]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by firstgate.proxmox.com (Proxmox) with ESMTPS id A01A0184D5 for ; Thu, 8 Apr 2021 10:40:04 +0200 (CEST) Received: from localhost (localhost [127.0.0.1]) by jack.fr.eu.org (Postfix) with ESMTP id 2A2861011DF4; Thu, 8 Apr 2021 10:32:46 +0200 (CEST) Received: from jack.fr.eu.org ([127.0.0.1]) by localhost (localhost [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 2_5WEFwUhik7; Thu, 8 Apr 2021 10:32:42 +0200 (CEST) Received-SPF: softfail (jack.fr.eu.org: Sender is not authorized by default to use 'git@jack.fr.eu.org' in 'mfrom' identity, however domain is not currently prepared for false failures (mechanism '~all' matched)) receiver=jack.fr.eu.org; identity=mailfrom; envelope-from="git@jack.fr.eu.org"; helo=debian.m6.fr; client-ip=192.168.1.50 Received: from debian.m6.fr (unknown [192.168.1.50]) by jack.fr.eu.org (Postfix) with ESMTPSA id 345CC107B91B; Thu, 8 Apr 2021 10:32:42 +0200 (CEST) From: Alexandre Bruyelles To: pve-devel@lists.proxmox.com Cc: Alexandre Bruyelles Date: Thu, 8 Apr 2021 10:32:27 +0200 Message-Id: <20210408083227.17478-2-git@jack.fr.eu.org> X-Mailer: git-send-email 2.31.0 In-Reply-To: <20210408083227.17478-1-git@jack.fr.eu.org> References: <20210408083227.17478-1-git@jack.fr.eu.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-SPAM-LEVEL: Spam detection results: 0 KAM_DMARC_STATUS 0.01 Test Rule for DKIM or SPF Failure with Strict Alignment RDNS_DYNAMIC 0.363 Delivered to internal network by host with dynamic-looking rDNS SPF_HELO_PASS -0.001 SPF: HELO matches SPF record SPF_PASS -0.001 SPF: sender matches SPF record URIBL_BLOCKED 0.001 ADMINISTRATOR NOTICE: The query to URIBL was blocked. See http://wiki.apache.org/spamassassin/DnsBlocklists#dnsbl-block for more information. [evpnplugin.pm] X-Mailman-Approved-At: Thu, 08 Apr 2021 10:45:35 +0200 Subject: [pve-devel] [PATCH container 1/1] zones: evpn: add a default unreachable, to prevent vrf leak X-BeenThere: pve-devel@lists.proxmox.com X-Mailman-Version: 2.1.29 Precedence: list List-Id: Proxmox VE development discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 08 Apr 2021 08:40:35 -0000 On Linux, when no route is found in a vrf, it somehow fallback to the default routing table. In our case, that means a leak from the overlay to the underlay. Adding a low priority unreachable catch-all route is the way to go, as per the doc: https://www.kernel.org/doc/Documentation/networking/vrf.txt Signed-off-by: Alexandre Bruyelles --- PVE/Network/SDN/Zones/EvpnPlugin.pm | 1 + 1 file changed, 1 insertion(+) diff --git a/PVE/Network/SDN/Zones/EvpnPlugin.pm b/PVE/Network/SDN/Zones/EvpnPlugin.pm index e6ee839..ca000cf 100644 --- a/PVE/Network/SDN/Zones/EvpnPlugin.pm +++ b/PVE/Network/SDN/Zones/EvpnPlugin.pm @@ -134,6 +134,7 @@ sub generate_sdn_config { #vrf interface @iface_config = (); push @iface_config, "vrf-table auto"; + push @iface_config, "post-up ip route add vrf $vrf_iface unreachable default metric 4278198272"; push(@{$config->{$vrf_iface}}, @iface_config) if !$config->{$vrf_iface}; if ($vrfvxlan) { -- 2.31.0