From owner-freebsd-bugs@freebsd.org Fri Aug 2 04:54:15 2019 Return-Path: Delivered-To: freebsd-bugs@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 4F5A0A97C9 for ; Fri, 2 Aug 2019 04:54:15 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mailman.nyi.freebsd.org (unknown [127.0.1.3]) by mx1.freebsd.org (Postfix) with ESMTP id 460FF31R5Qz4cYS for ; Fri, 2 Aug 2019 04:54:15 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: by mailman.nyi.freebsd.org (Postfix) id 2F27CA97C8; Fri, 2 Aug 2019 04:54:15 +0000 (UTC) Delivered-To: bugs@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 2EE89A97C7 for ; Fri, 2 Aug 2019 04:54:15 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) server-signature RSA-PSS (4096 bits) client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 460FF30Xlhz4cYR for ; Fri, 2 Aug 2019 04:54:15 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2610:1c1:1:606c::50:1d]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 0873B256C6 for ; Fri, 2 Aug 2019 04:54:15 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org ([127.0.1.5]) by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id x724sEJD032010 for ; Fri, 2 Aug 2019 04:54:14 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id x724sElv032009 for bugs@FreeBSD.org; Fri, 2 Aug 2019 04:54:14 GMT (envelope-from bugzilla-noreply@freebsd.org) X-Authentication-Warning: kenobi.freebsd.org: www set sender to bugzilla-noreply@freebsd.org using -f From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 239590] ipfw rule doesn't forward TCP connections made through the host's LAN address Date: Fri, 02 Aug 2019 04:54:14 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: kern X-Bugzilla-Version: 11.2-STABLE X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Only Me X-Bugzilla-Who: yuri@freebsd.org X-Bugzilla-Status: New X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: bugs@FreeBSD.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: bug_id short_desc product version rep_platform op_sys bug_status bug_severity priority component assigned_to reporter Message-ID: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-BeenThere: freebsd-bugs@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 02 Aug 2019 04:54:15 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D239590 Bug ID: 239590 Summary: ipfw rule doesn't forward TCP connections made through the host's LAN address Product: Base System Version: 11.2-STABLE Hardware: Any OS: Any Status: New Severity: Affects Only Me Priority: --- Component: kern Assignee: bugs@FreeBSD.org Reporter: yuri@freebsd.org I need to forward incoming TCP connections made to my host 192.168.5.3 on t= he port 3100 to the IP address 10.0.0.101 port 3000 connected through another interface. These rules work when connection is made from a remote host: > ipfw -q nat 19001 config redirect_port tcp 10.0.0.101:3000 192.168.5.3:31= 00 > ipfw -q add 19001 nat 19001 tcp from any to 192.168.5.3 3100 in recv sk0 > ipfw -q add 19001 nat 19001 tcp from 10.0.0.101 3000 to any out xmit sk0 The problem: A similar firewall rule for connections from the host's LAN IP address (that pass through lo0) doesn't work: > ipfw -q add 19001 nat 19001 tcp from 192.168.5.3 to 192.168.5.3 3100 in r= ecv lo0 Wireshark shows that the incoming connection is from 192.168.5.3 to 192.168= .5.3 on 3100 but it gets immediately rejected instead of being forwarded. This rule looks very similar to the second rule above, just the interface is different. Why doesn't it work? --=20 You are receiving this mail because: You are the assignee for the bug.=