From owner-freebsd-questions@freebsd.org Sat Nov 23 16:23:15 2019 Return-Path: Delivered-To: freebsd-questions@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 C9D141B9397 for ; Sat, 23 Nov 2019 16:23:15 +0000 (UTC) (envelope-from tundra@tundraware.com) Received: from oceanview.tundraware.com (oceanview.tundraware.com [45.55.60.57]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "mailman.tundraware.com", Issuer "mailman.tundraware.com" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id 47Kz9t3t2yz4Db3 for ; Sat, 23 Nov 2019 16:23:14 +0000 (UTC) (envelope-from tundra@tundraware.com) Received: from [192.168.0.2] (ozzie.tundraware.com [75.145.138.73]) (authenticated bits=0) by oceanview.tundraware.com (8.15.2/8.15.2) with ESMTPSA id xANGLmG5087908 (version=TLSv1.2 cipher=AES128-SHA bits=128 verify=NO) for ; Sat, 23 Nov 2019 10:21:49 -0600 (CST) (envelope-from tundra@tundraware.com) To: FreeBSD Mailing List From: Tim Daneliuk Subject: Optimizing ipfw? 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Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.9.0 MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit X-Greylist: Sender succeeded SMTP AUTH, not delayed by milter-greylist-4.6.2 (oceanview.tundraware.com [45.55.60.57]); Sat, 23 Nov 2019 10:21:49 -0600 (CST) X-TundraWare-MailScanner-Information: Please contact the ISP for more information X-TundraWare-MailScanner-ID: xANGLmG5087908 X-TundraWare-MailScanner: Found to be clean X-TundraWare-MailScanner-SpamCheck: not spam (whitelisted), SpamAssassin (not cached, timed out) X-TundraWare-MailScanner-From: tundra@tundraware.com X-Spam-Status: No X-Rspamd-Queue-Id: 47Kz9t3t2yz4Db3 X-Spamd-Bar: + Authentication-Results: mx1.freebsd.org; dkim=none; dmarc=none; spf=pass (mx1.freebsd.org: domain of tundra@tundraware.com designates 45.55.60.57 as permitted sender) smtp.mailfrom=tundra@tundraware.com X-Spamd-Result: default: False [1.29 / 15.00]; ARC_NA(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; FROM_HAS_DN(0.00)[]; R_SPF_ALLOW(-0.20)[+a]; TO_MATCH_ENVRCPT_ALL(0.00)[]; MIME_GOOD(-0.10)[text/plain]; PREVIOUSLY_DELIVERED(0.00)[freebsd-questions@freebsd.org]; DMARC_NA(0.00)[tundraware.com]; NEURAL_SPAM_MEDIUM(0.58)[0.575,0]; RCPT_COUNT_ONE(0.00)[1]; NEURAL_HAM_LONG(-0.31)[-0.307,0]; MIME_TRACE(0.00)[0:+]; TO_DN_ALL(0.00)[]; IP_SCORE(0.33)[ip: (-4.71), ipnet: 45.55.32.0/19(4.48), asn: 14061(1.91), country: US(-0.05)]; FROM_EQ_ENVFROM(0.00)[]; R_DKIM_NA(0.00)[]; SUBJECT_ENDS_QUESTION(1.00)[]; ASN(0.00)[asn:14061, ipnet:45.55.32.0/19, country:US]; MID_RHS_MATCH_FROM(0.00)[]; RCVD_TLS_ALL(0.00)[]; RCVD_COUNT_TWO(0.00)[2] X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 23 Nov 2019 16:23:15 -0000 I have a boundary/gateway FreeBSD 11 machine running mostly as a NATing firewall. The machine is very lightly loaded and has no memory pressure to speak of. Recently, I tried going from about 2800 ipfw rules to over 34,000 to block a number of nations completely. This works, but is just DESTROYS my network throughput - It reduces it from around 175Mb/sec to 20 Mb/sec. Cables, switches, NICs etc. have been removed as suspects and falling back to either an open firewall or reduced ruleset firewall restores performance. So... is this a machine sizing problem - would a faster CPU help (this is an older 3.2Ghz quad core i5) or is it just the nature of a software firewall and I am exceeding its reasonable throughput? i.e., Is there ipfw tuning to be done or have I just hit the limits of the model and need to consider a hardware firewall? P.S. The rules in question are thousands of statements like: ipfw add deny all from some-IP-or-CIDR-block to any via NIC