Date: Wed, 08 Oct 2014 08:45:32 -0500 From: "William A. Mahaffey III" <wam@hiwaay.net> To: "FreeBSD Questions !!!!" <freebsd-questions@freebsd.org> Subject: Re: oddball syslog entries .... Message-ID: <54353FFC.3050309@hiwaay.net> In-Reply-To: <5434E626.80104@qeng-ho.org> References: <5434A8F7.1090507@hiwaay.net> <5434E626.80104@qeng-ho.org>
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On 10/08/14 02:22, Arthur Chance wrote: > On 08/10/2014 04:01, William A. Mahaffey III wrote: >> >> >> Over the last couple of days I am seeing some odd (to me) entries in my >> messages file: >> >> > [irrelevance snipped] >> Oct 5 11:30:22 kabini1 kernel: Limiting closed port RST response from >> 276 to 200 packets/sec >> Oct 5 11:30:24 kabini1 kernel: Limiting closed port RST response from >> 239 to 200 packets/sec >> Oct 5 11:30:25 kabini1 kernel: Limiting closed port RST response from >> 280 to 200 packets/sec >> Oct 5 11:30:26 kabini1 kernel: Limiting closed port RST response from >> 319 to 200 packets/sec >> Oct 7 10:41:25 kabini1 kernel: Limiting closed port RST response from >> 276 to 200 packets/sec >> Oct 7 10:41:26 kabini1 kernel: Limiting closed port RST response from >> 239 to 200 packets/sec >> Oct 7 10:41:27 kabini1 kernel: Limiting closed port RST response from >> 280 to 200 packets/sec >> Oct 7 10:41:29 kabini1 kernel: Limiting closed port RST response from >> 319 to 200 packets/sec >> Oct 7 14:59:41 kabini1 kernel: Limiting closed port RST response from >> 253 to 200 packets/sec >> Oct 7 14:59:42 kabini1 kernel: Limiting closed port RST response from >> 233 to 200 packets/sec >> Oct 7 14:59:44 kabini1 kernel: Limiting closed port RST response from >> 265 to 200 packets/sec >> Oct 7 14:59:45 kabini1 kernel: Limiting closed port RST response from >> 295 to 200 packets/sec >> Oct 7 14:59:47 kabini1 kernel: Limiting closed port RST response from >> 324 to 200 packets/sec >> Oct 7 15:03:18 kabini1 kernel: Limiting closed port RST response from >> 253 to 200 packets/sec >> Oct 7 15:03:20 kabini1 kernel: Limiting closed port RST response from >> 233 to 200 packets/sec >> Oct 7 15:03:21 kabini1 kernel: Limiting closed port RST response from >> 265 to 200 packets/sec >> Oct 7 15:03:22 kabini1 kernel: Limiting closed port RST response from >> 295 to 200 packets/sec >> Oct 7 15:03:24 kabini1 kernel: Limiting closed port RST response from >> 324 to 200 packets/sec >> >> The stuff from Oct 2 is irrelevant, included for completeness/context. >> The lines about 'Limiting closed port ....' are puzzling to me. Where >> are they coming from ? Problem or chatter ? Enquiring minds wanna know >> ;-) .... TIA for any clues .... >> >> > > I occasionally get this on a machine that sits squarely behind a > locked down pfSense firewall. If you want to see what's causing it, > > sysctl net.inet.tcp.log_in_vain=1 > > (put into your /etc/sysctl.conf if you want it to last over reboots.) > This will show you where the packet came from and which port on your > machine was the target. > > In my case it seemed to be a mix of DNS responses from the outside > world that arrived too late and a local long running Firefox > occasionally pounding on the indent port (113) for no good reason I > ever discovered. > > Nothing seems particularly dubious, unless the DNS responses were > attempted spoofs, but my ISP is one of the better UK ones and I'd > expect them to mitigate such attacks. > > Thanks, that seems quite simple, I'm on it now :-) .... -- William A. Mahaffey III ---------------------------------------------------------------------- "The M1 Garand is without doubt the finest implement of war ever devised by man." -- Gen. George S. Patton Jr.
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