From mboxrd@z Thu Jan 1 00:00:00 1970 From: Patrick McHardy Subject: Re: nf_ct_ftp: dropping packet Date: Fri, 19 Mar 2010 15:37:14 +0100 Message-ID: <4BA38C1A.6050103@trash.net> References: <201003191310.02079.mm@yuhu.biz> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <201003191310.02079.mm@yuhu.biz> Sender: netfilter-owner@vger.kernel.org List-ID: Content-Type: text/plain; charset="us-ascii" To: Marian Marinov Cc: netfilter@vger.kernel.org Marian Marinov wrote: > Hello, > I'm working for a fairly large shared hosting provider. Recently we decided to > upgrade the kernel of our servers to 2.6.33. However, during the testing phase > we started to see these messages in the logs: > > Mar 18 07:52:26 serv01 kernel: nf_ct_ftp: dropping packetIN= OUT=eth0 > SRC=212.212.212.12 DST=204.16.203.11 LEN=53 TOS=0x10 PREC=0x00 TTL=64 ID=21858 > DF PROTO=TCP SPT=21 DPT=47282 SEQ=1836474396 ACK=1448911219 WINDOW=23 RES=0x00 > ACK PSH FIN URGP=0 > > We don't have iptables LOG rules, this is generated directly from the kernel. > > 212.212... is not a real IP I have substituted it. > > Our kernel is 2.6.33 with GRsecurity patch. > > We don't have any problems with the ftp service, however the messages in the > log files are annoying. > > Can someone tell me what can cause those? The helper decided to drop a packet. This is usually cause by partial FTP command matches, which can't be handled. > > > My current thoughts are to remove the printk from the kernel. But is there a > better solution? > If you don't use logging, unload the ipt_LOG module.