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Sat, 8 May 2021 16:32:00 +0000 Received: by kubenode517.mail-prod1.omega.ir2.yahoo.com (VZM Hermes SMTP Server) with ESMTPA ID 7fb9a5e98d8ade9157fad9b2e46683f3; Sat, 08 May 2021 16:32:00 +0000 (UTC) To: wireguard@lists.zx2c4.com From: lejeczek Subject: secondary IP on wg0 fails Message-ID: <204f6e7b-d594-c2c0-5242-1643055065c3@yahoo.co.uk> Date: Sat, 8 May 2021 17:31:58 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.10.1 MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Content-Language: en-US References: <204f6e7b-d594-c2c0-5242-1643055065c3.ref@yahoo.co.uk> X-Mailer: WebService/1.1.18231 mail.backend.jedi.jws.acl:role.jedi.acl.token.atz.jws.hermes.yahoo Apache-HttpAsyncClient/4.1.4 (Java/16) X-BeenThere: wireguard@lists.zx2c4.com X-Mailman-Version: 2.1.30rc1 Precedence: list List-Id: Development discussion of WireGuard List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: wireguard-bounces@lists.zx2c4.com Sender: "WireGuard" Hi guys. I'm experiencing a pretty weird wireguard, or perhaps kernel/OS stack bits behavior. I have three nodes which all can ping each other on wg0's IPs but when I add a secondary IP: -> $ ip addr add 10.0.0.226/24 dev wg0 it gets weird, namely, say when that sec IP is on A -> B ping returns; C ping waits, no errors, no return B -> both C & A pings return C -> neither A nor B ping returns I'm on CentOS with 4.18.0-301.1.el8.x86_64. All three nodes are virtually identical kvm VMs. any suggestions as to what is not working here or how to troubleshoot are vey appreciated. many thanks, L.