From mboxrd@z Thu Jan 1 00:00:00 1970 From: Michal Kubecek Subject: Re: UDP fragments , legitimate ? Date: Mon, 17 Dec 2012 11:04:16 +0100 Message-ID: <20121217100416.GA4858@lion> References: Mime-Version: 1.0 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: Content-Disposition: inline In-Reply-To: Sender: netfilter-owner@vger.kernel.org List-ID: Content-Type: text/plain; charset="utf-8" To: =?utf-8?B?5Y+26Zuo6aOe?= Cc: "netfilter@vger.kernel.org" On Fri, Dec 14, 2012 at 12:06:12PM -0800, =E5=8F=B6=E9=9B=A8=E9=A3=9E w= rote: >=20 > Is there legitimate use of UDP fragments in the wild? have you seen > commonly used application sending/receving UDP packets that is large > than MTU ? Is it safe to assume such traffic is nothing but dumb > attacks? About one year ago I've seen (fragmented) aproximately 3KB packets of JXTA protocol. But I have no idea how JXTA works so I don't know whethe= r this size is normal or just a result of their configuration. Michal Kubece= k