From owner-freebsd-questions@FreeBSD.ORG Sat Sep 19 16:54:10 2009 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id D06A21065676 for ; Sat, 19 Sep 2009 16:54:10 +0000 (UTC) (envelope-from simon@optinet.com) Received: from cobra.acceleratedweb.net (cobra-gw.acceleratedweb.net [207.99.79.37]) by mx1.freebsd.org (Postfix) with SMTP id 93FC28FC14 for ; Sat, 19 Sep 2009 16:54:10 +0000 (UTC) Received: (qmail 23247 invoked by uid 110); 19 Sep 2009 16:27:27 -0000 Received: from unknown (HELO desktop1) (simon@optinet.com@69.113.73.210) by cobra.acceleratedweb.net with SMTP; 19 Sep 2009 16:27:27 -0000 From: "Simon" To: "freebsd-questions@freebsd.org" Date: Sat, 19 Sep 2009 12:26:03 -0400 Priority: Normal X-Mailer: PMMail 2000 Professional (2.20.2717) For Windows 2000 (5.1.2600;3) MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Message-Id: <20090919165410.D06A21065676@hub.freebsd.org> Subject: FreeBSD AMD64 7.1 LAST_ACK stuck X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 19 Sep 2009 16:54:10 -0000 Hello, I'm running FreeBSD AMD64 7.1-p4 After the server experienced a DoS attack, it ended up with many sockets stuck in LACK_ACK state as reported by netstat -na Is this a bug or something else is wrong, how would I troubleshoot this? Please CC me. Thank you very much! Simon