From owner-freebsd-virtualization@freebsd.org Sun Aug 9 04:50:58 2020 Return-Path: Delivered-To: freebsd-virtualization@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 0C6D53AD1B3 for ; Sun, 9 Aug 2020 04:50:58 +0000 (UTC) (envelope-from jo@durchholz.org) Received: from www382.your-server.de (www382.your-server.de [78.46.146.228]) (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 did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 4BPRW51R11z4fpD for ; Sun, 9 Aug 2020 04:50:56 +0000 (UTC) (envelope-from jo@durchholz.org) Received: from sslproxy03.your-server.de ([88.198.220.132]) by www382.your-server.de with esmtpsa (TLSv1.3:TLS_AES_256_GCM_SHA384:256) (Exim 4.92.3) (envelope-from ) id 1k4dIM-00074X-Q6 for freebsd-virtualization@freebsd.org; Sun, 09 Aug 2020 06:50:54 +0200 Received: from [81.221.210.71] (helo=[192.168.178.29]) by sslproxy03.your-server.de with esmtpsa (TLSv1.3:TLS_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1k4dIM-0006Lo-M6 for freebsd-virtualization@freebsd.org; Sun, 09 Aug 2020 06:50:54 +0200 Subject: Re: Restricting IP ranges for guests over tap devices To: freebsd-virtualization@freebsd.org References: <20200801145144.7bf342d9@sunflower.int.arc7.info> <7acfc19f-f58f-ed55-0ed5-162c3ef23d87@quip.cz> From: Joachim Durchholz Message-ID: <11e184c2-29a3-275f-a1ee-c032f7ad0bb2@durchholz.org> Date: Sun, 9 Aug 2020 06:50:54 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: <7acfc19f-f58f-ed55-0ed5-162c3ef23d87@quip.cz> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit X-Authenticated-Sender: jo@durchholz.org X-Virus-Scanned: Clear (ClamAV 0.102.4/25898/Sat Aug 8 14:44:31 2020) X-Rspamd-Queue-Id: 4BPRW51R11z4fpD X-Spamd-Bar: -- Authentication-Results: mx1.freebsd.org; dkim=none; dmarc=none; spf=pass (mx1.freebsd.org: domain of jo@durchholz.org designates 78.46.146.228 as permitted sender) smtp.mailfrom=jo@durchholz.org X-Spamd-Result: default: False [-2.42 / 15.00]; RCVD_VIA_SMTP_AUTH(0.00)[]; ARC_NA(0.00)[]; MID_RHS_MATCH_FROM(0.00)[]; FROM_HAS_DN(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; R_SPF_ALLOW(-0.20)[+a]; MIME_GOOD(-0.10)[text/plain]; TO_DN_NONE(0.00)[]; DMARC_NA(0.00)[durchholz.org]; RCPT_COUNT_ONE(0.00)[1]; NEURAL_HAM_LONG(-0.96)[-0.959]; RCVD_COUNT_THREE(0.00)[3]; NEURAL_HAM_MEDIUM(-0.91)[-0.911]; NEURAL_HAM_SHORT(-0.25)[-0.245]; RCVD_IN_DNSWL_NONE(0.00)[78.46.146.228:from]; FROM_EQ_ENVFROM(0.00)[]; R_DKIM_NA(0.00)[]; MIME_TRACE(0.00)[0:+]; ASN(0.00)[asn:24940, ipnet:78.46.0.0/15, country:DE]; RCVD_TLS_ALL(0.00)[]; HAS_X_AS(0.00)[] X-BeenThere: freebsd-virtualization@freebsd.org X-Mailman-Version: 2.1.33 Precedence: list List-Id: "Discussion of various virtualization techniques FreeBSD supports." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 09 Aug 2020 04:50:58 -0000 Am 02.08.20 um 14:45 schrieb Miroslav Lachman: > For me the more serious issue is that malicious guest can assign IP of > another guest or the main host and cause some collisions or > malfunctions. I am looking for the right solution for a long time. As of FreeBSD 12, you can put Bhyve into a jail. Jails can use VNETs, which can be configured for restricted IPs. https://forums.freebsd.org/threads/bhyve-inside-jails-why.69109/ talks about this. Disclaimer: I don't use bhyve so I don't know how accurate the postings are. Regards, Jo