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 72AAD7EA19 for ; Thu, 11 Nov 2021 11:40:35 +0100 (CET) Received: from firstgate.proxmox.com (localhost [127.0.0.1]) by firstgate.proxmox.com (Proxmox) with ESMTP id 67CBC92B2 for ; Thu, 11 Nov 2021 11:40:35 +0100 (CET) Received: from proxmox-new.maurer-it.com (proxmox-new.maurer-it.com [94.136.29.106]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by firstgate.proxmox.com (Proxmox) with ESMTPS id EDB7D928E for ; Thu, 11 Nov 2021 11:40:34 +0100 (CET) Received: from proxmox-new.maurer-it.com (localhost.localdomain [127.0.0.1]) by proxmox-new.maurer-it.com (Proxmox) with ESMTP id C375640B2E; Thu, 11 Nov 2021 11:40:34 +0100 (CET) Message-ID: <179fb53f-5dff-8d3a-38b6-a392b9bcb581@proxmox.com> Date: Thu, 11 Nov 2021 11:40:34 +0100 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:95.0) Gecko/20100101 Thunderbird/95.0 Content-Language: en-US To: Proxmox VE development discussion , Alexandre Derumier References: <20210924084855.3074162-1-aderumier@odiso.com> From: Thomas Lamprecht In-Reply-To: <20210924084855.3074162-1-aderumier@odiso.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-SPAM-LEVEL: Spam detection results: 0 AWL 2.133 Adjusted score from AWL reputation of From: address BAYES_00 -1.9 Bayes spam probability is 0 to 1% KAM_DMARC_STATUS 0.01 Test Rule for DKIM or SPF Failure with Strict Alignment NICE_REPLY_A -3.999 Looks like a legit reply (A) SPF_HELO_NONE 0.001 SPF: HELO does not publish an SPF Record SPF_PASS -0.001 SPF: sender matches SPF record Subject: Re: [pve-devel] [PATCH pve-common 0/2] add disable bridge learning feature 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, 11 Nov 2021 10:40:35 -0000 On 24.09.21 10:48, Alexandre Derumier wrote: > Currently, if bridge receive an unknown dest mac (network bug/attack/..), > we are flooding packets to all bridge ports. > > This can waste cpu time, even more with firewall enabled. > Also, if firewall is used with reject action, the src mac of RST > packet is the original unknown dest mac. > (This can block the server at Hetzner for example) > > So, we can disable learning && unicast_flood on tap|veth|fwln port interface. > Then mac address need to be add statically in bridge fdb. I'm a bit out of the loop of the with the whole bad hetzner network thingy, is this still relevant as I'd see if I can get it in finally..