From nobody Sat Dec 04 19:08:04 2021 X-Original-To: freebsd-net@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id DA4D418D5808 for ; Sat, 4 Dec 2021 19:08:09 +0000 (UTC) (envelope-from bz@freebsd.org) Received: from smtp.freebsd.org (smtp.freebsd.org [96.47.72.83]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "smtp.freebsd.org", Issuer "R3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4J5zjj53scz3BmF; Sat, 4 Dec 2021 19:08:09 +0000 (UTC) (envelope-from bz@freebsd.org) Received: from mx1.sbone.de (mx1.sbone.de [IPv6:2a01:4f8:13b:39f::9f:25]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "mx1.sbone.de", Issuer "SBone.DE" (not verified)) (Authenticated sender: bz/mail) by smtp.freebsd.org (Postfix) with ESMTPSA id 7477027B01; Sat, 4 Dec 2021 19:08:09 +0000 (UTC) (envelope-from bz@freebsd.org) Received: from mail.sbone.de (mail.sbone.de [IPv6:fde9:577b:c1a9:31::2013:587]) (using TLSv1 with cipher ADH-CAMELLIA256-SHA (256/256 bits)) (No client certificate requested) by mx1.sbone.de (Postfix) with ESMTPS id 7A1F68D4A129; Sat, 4 Dec 2021 19:08:07 +0000 (UTC) Received: from content-filter.sbone.de (content-filter.sbone.de [IPv6:fde9:577b:c1a9:31::2013:2742]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mail.sbone.de (Postfix) with ESMTPS id A5F04E707AE; Sat, 4 Dec 2021 19:08:06 +0000 (UTC) X-Virus-Scanned: amavisd-new at sbone.de Received: from mail.sbone.de ([IPv6:fde9:577b:c1a9:31::2013:587]) by content-filter.sbone.de (content-filter.sbone.de [fde9:577b:c1a9:31::2013:2742]) (amavisd-new, port 10024) with ESMTP id dQ4T3xBM7BBa; Sat, 4 Dec 2021 19:08:05 +0000 (UTC) Received: from nv.sbone.de (nv.sbone.de [IPv6:fde9:577b:c1a9:31::2013:138]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mail.sbone.de (Postfix) with ESMTPSA id 66403E707AD; Sat, 4 Dec 2021 19:08:05 +0000 (UTC) Date: Sat, 4 Dec 2021 19:08:04 +0000 (UTC) From: "Bjoern A. Zeeb" To: Kurt Jaeger cc: freebsd-net@freebsd.org Subject: Re: why multi-hop icmp redirects to 0.0.0.0 on 13.0 ? In-Reply-To: Message-ID: References: X-OpenPGP-Key-Id: 0x14003F198FEFA3E77207EE8D2B58B8F83CCF1842 List-Id: Networking and TCP/IP with FreeBSD List-Archive: https://lists.freebsd.org/archives/freebsd-net List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-net@freebsd.org MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1638644889; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=xXr6lrIN8nJmw5R+uV8jNhsQp0ZPDSQokJ42cvX0jKE=; b=g8lWcbd9sWUcT7nvQwbzRfGdfF8iDVtdvTLK+6sYWBPRarl0xqqpSi/ECW3Ai6wFWRQFz7 tu4Y71d1bXBiQTm4RAyaVr4atQT/m+k2lknYaxd8grGgrtUzJb9PnRlqIo+SBgjDWniuph jqwlxXdBKUEkPuYViWMYhNqg+YhbT9ZPsSoX9CTWaOavKzkGC5PYNjJepZjISk5hdLcI5q lJLUwe7jkmucLrVHynfXOYtHSGMHS1JYSynIQRuMFCYzomgm9aQitCxQPCCg22Ie6ea2DM UIo6k7suT/UoiXhEiKPOkjDhNrtzO/PEvY9w1Zi36k77DqF77lGxAAoWSlDvXQ== ARC-Seal: i=1; s=dkim; d=freebsd.org; t=1638644889; a=rsa-sha256; cv=none; b=jjXUmVRWaSrjHPvybWR24MuN8TLatTk040Sy9e5vcze7/72IIXDzCAmPdh607ltOZVLtEy 9I42iGKwfUs2N/kGJvpcXVNFFeyt2v6nk0JueMSRai9pTX7CtPyY2PkgddcblehRsPYMxC ciYp/rliNd6eH14ArFNar6BHZgunY9gS5JYDfhZXmQQXGFnwB4vOYlNJyqlvZSVOW6Zu2S sDdFSGXCqAs5lWtS+LaL2R8zobDNb2yLaXUG601ZilfkTPtfzC5XZNU4GZitK11VwEEbaN rLHWE3zV01Slzm7lNuRkZ+l61vocfhYjFvabGuFz728/BMbzr1xpHauk8oY/+Q== ARC-Authentication-Results: i=1; mx1.freebsd.org; none X-ThisMailContainsUnwantedMimeParts: N On Sat, 4 Dec 2021, Kurt Jaeger wrote: I can reproduce some of this problem in the lab: 19:01:53.113623 02:16:b4:9a:e5:0a > 02:16:b4:9a:e5:0b, ethertype IPv4 (0x0800), length 126: (tos 0x0, ttl 64, id 56538, offset 0, flags [none], proto ICMP (1), length 112) 203.0.113.1 > 203.0.113.254: ICMP redirect 192.0.2.2 to host 0.0.0.0, length 92 ^^^^^^^^^^^ (tos 0x0, ttl 1, id 48284, offset 0, flags [none], proto ICMP (1), length 84) Now the above is one of the problems; the other parts I'll get back to you off-list first because it might not be a network stack problem in first instance. -- Bjoern A. Zeeb r15:7