Date: Tue, 21 Apr 1998 20:13:20 +0400 From: Vladimir Uralsky <uwl@koala.lanck.ru> To: freebsd-security@FreeBSD.ORG Subject: Re: New DoS attack? Message-ID: <19980421201320.15084@koala.lanck.ru> In-Reply-To: <199804210533.JAA02644@lms.ru>; from Alexander B. Povolotsky on Tue, Apr 21, 1998 at 09:33:37AM %2B0400 References: <199804210533.JAA02644@lms.ru>
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On Tue, Apr 21, 1998 at 09:33:37AM +0400, Alexander B. Povolotsky wrote: > During last months, I've experienced several STRANGE hangs. TCP stack worked > OK, while nothing else did. I thought of poor hardware, instable snap, > everything else. We have same problems, system hangs every day. Searching a reasons we find: in all cases of crash we had one ftp user logged in. A user upload something to incoming directory. We change version of ftpd from default to latest wu-ftpd. Situation repeated again. We continuously run a systat -vm and when system hangs can see no hdd transfers, but periodical pci activity (we have only one pci device -- AHA2940). It's mostly like a SCSI bus hanging I think. In the nearest future we'll try to change a AHA to BusLogic. We and some other people have same problem all of these PCs equipped AHA2940/AIC78[78]0 or AIC7770 host adapters. But these kind of devices so popular :-). I see packets to port 0 many times, but it is not hang our system. -- Vova. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe security" in the body of the message
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