From nobody Wed Jun 14 06:05:48 2023 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 4Qgw090p5Tz4dGMW for ; Wed, 14 Jun 2023 06:06:01 +0000 (UTC) (envelope-from benoitc@enki-multimedia.eu) Received: from mail-4018.proton.ch (mail-4018.proton.ch [185.70.40.18]) (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 "protonmail.com", Issuer "R3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4Qgw0701N2z4Lrk for ; Wed, 14 Jun 2023 06:05:58 +0000 (UTC) (envelope-from benoitc@enki-multimedia.eu) Authentication-Results: mx1.freebsd.org; dkim=pass header.d=enki-multimedia.eu header.s=protonmail3 header.b=aNwTXGQ0; spf=pass (mx1.freebsd.org: domain of benoitc@enki-multimedia.eu designates 185.70.40.18 as permitted sender) smtp.mailfrom=benoitc@enki-multimedia.eu; dmarc=pass (policy=none) header.from=enki-multimedia.eu Date: Wed, 14 Jun 2023 06:05:48 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=enki-multimedia.eu; s=protonmail3; t=1686722755; x=1686981955; bh=ABwEgc1mzn0Cmz1vyejshju1iYXxRiLxblPmI3ZCr6U=; h=Date:To:From:Subject:Message-ID:Feedback-ID:From:To:Cc:Date: Subject:Reply-To:Feedback-ID:Message-ID:BIMI-Selector; b=aNwTXGQ06L/lgxbDAU9w4JhuDZ8qDFQMwcKbQ8DwVs0lZ2eV457EI+AmUQdB7XMnR nssRJ7ewdq+vyq2lefBUBxwbvljtYtaXesh9UTOS0ZSTAdRb34qW9B5VZk54bWCxwy Opeby3N7PdSOvLngGkcmJTCH1uvL9gSqYyiIjwKOeC8R7xL5Ow7YNTiEyNMiN43fNH izjvbOz6cNge7OaOkSy5kHAnJzNVoKqU+0ahPqoqtHnmT7a0DVbKr06NGC39+4SAqI kKNDh5uW3tjwzrT2lQNOZfL4IBFolAzaFUPmH2ayKI4NgdaOGgyxmZlV4rhaBJke37 QGXeacC9Xk+jg== To: "freebsd-net@FreeBSD.org" From: Benoit Chesneau Subject: can't add a /24 blackhole route with a /32 loopback Message-ID: <9Jh8lSg93tjEc0-UEU3MQkGuQc7R9Aht0NBt4kEr6-wtgMdf673nws_jGaHelYwz0U78ik2BM4WLUca2JZAjrX-WSbP5QS4rsvoBHZo_JZo=@enki-multimedia.eu> Feedback-ID: 9066678:user:proton 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=utf-8 Content-Transfer-Encoding: quoted-printable X-Spamd-Result: default: False [-3.95 / 15.00]; NEURAL_HAM_LONG(-1.00)[-1.000]; NEURAL_HAM_MEDIUM(-1.00)[-0.999]; NEURAL_HAM_SHORT(-0.95)[-0.950]; DMARC_POLICY_ALLOW(-0.50)[enki-multimedia.eu,none]; R_SPF_ALLOW(-0.20)[+ip4:185.70.40.0/24]; R_DKIM_ALLOW(-0.20)[enki-multimedia.eu:s=protonmail3]; MIME_GOOD(-0.10)[text/plain]; RCVD_COUNT_ZERO(0.00)[0]; ARC_NA(0.00)[]; FROM_EQ_ENVFROM(0.00)[]; MLMMJ_DEST(0.00)[freebsd-net@freebsd.org]; MIME_TRACE(0.00)[0:+]; TO_DN_EQ_ADDR_ALL(0.00)[]; DKIM_TRACE(0.00)[enki-multimedia.eu:+]; ASN(0.00)[asn:62371, ipnet:185.70.40.0/24, country:CH]; FROM_HAS_DN(0.00)[]; BLOCKLISTDE_FAIL(0.00)[185.70.40.18:server fail]; TO_MATCH_ENVRCPT_ALL(0.00)[]; RCPT_COUNT_ONE(0.00)[1]; MID_RHS_MATCH_FROM(0.00)[] X-Rspamd-Queue-Id: 4Qgw0701N2z4Lrk X-Spamd-Bar: --- X-ThisMailContainsUnwantedMimeParts: N Hi, When I setup a loopback to a /32 , I can add a /24 as a blackhole route any= more. I can only create a /24 attached to this looopback. Ie. when `lo1` is set to `1.1.1.1/32` I cant create a blackhole route to `1.1.1= .0/24` using the command : ` route add=C2=A01.1.1.0/24 -blackhole` . Is the= re any reason for it? The idea is to be able to advertise the prefix `1.1.1= .0/24`=C2=A0via BGP (bird) and use=C2=A01.1.1.1/32`=C2=A0 as a loopback dis= tributed to other nodes using OSPF. I can probably make the loopback a /24 = =C2=A0used by bird but what would be the other way to do it? Beno=C3=AEt