Date: Thu, 18 Mar 1999 23:50:27 +0100 From: "laurens van alphen" <lva@dds.nl> To: <junkmale@xtra.co.nz> Cc: <freebsd-security@freebsd.org> Subject: RE: unknown connection attempts from localhost Message-ID: <000001be7191$b78e5e70$0a0010ac@ren.craxx.com> In-Reply-To: <19990318182128.MNSH682101.mta1-rme@wocker>
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Hi, We see those too: > [snip] Connection attempt to UDP 127.0.0.1:1645 from 127.0.0.1:53 > [snip] Connection attempt to UDP 127.0.0.1:1739 from 127.0.0.1:53 That's bind for sure, dunno why it's sending UDP packets to random >1024 ports. Note that the 'connection attempt' is misleading: UDP is connectionless. Anyone bothered to ask someone at the ISC? > [snip] Connection attempt to UDP 127.0.0.1:512 from 127.0.0.1:2191 > [snip] Connection attempt to UDP 127.0.0.1:512 from 127.0.0.1:2192 Using procmail as LDA? (maybe others have this behaviour as well) It's the biff mail notification protocol. Stock FreeBSD (3.1-R at least) has a mail notification daemon on port 512 (biff). You probably turned off the biff daemon in inetd.conf, you should! (on a nameserver at least) Three options here: 1. fix your LDA 2. choose another LDA 3. live with it (that's what we do) Cheers, -- laurens van alphen, craxx alphen@craxx.com, http://craxx.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-security" in the body of the message
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