From owner-freebsd-hackers Fri Dec 29 06:16:06 1995 Return-Path: owner-hackers Received: (from root@localhost) by freefall.freebsd.org (8.7.3/8.7.3) id GAA21827 for hackers-outgoing; Fri, 29 Dec 1995 06:16:06 -0800 (PST) Received: from asstdc.scgt.oz.au (root@asstdc.scgt.oz.au [202.14.234.65]) by freefall.freebsd.org (8.7.3/8.7.3) with SMTP id GAA21801 for ; Fri, 29 Dec 1995 06:16:00 -0800 (PST) Received: (from imb@localhost) by asstdc.scgt.oz.au (8.6.12/BSD4.4) id BAA05189; Sat, 30 Dec 1995 01:15:15 +1100 From: michael butler Message-Id: <199512291415.BAA05189@asstdc.scgt.oz.au> Subject: Re: bug in UDP stack with our aliasing scheme :-( To: guido@gvr.win.tue.nl (Guido van Rooij) Date: Sat, 30 Dec 1995 01:15:14 +1100 (EST) Cc: guido@IAEhv.nl, freebsd-hackers@freebsd.org In-Reply-To: <199512291310.OAA28407@gvr.win.tue.nl> from "Guido van Rooij" at Dec 29, 95 02:10:46 pm X-Mailer: ELM [version 2.4 PL24beta] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-hackers@freebsd.org Precedence: bulk Guido van Rooij writes: > I think we ought reconsidering why the netmask of an ip alias on the same > subnet as the `real' ip adres is to be set to 0xffffffff in stead of the > real subnet mask. This definately breaks several things. Currently, I have a machine which has two aliases with a netmask of 255.255.255.240 (in two different subnets) but on the same ethernet card. It also has two other aliases in its non-primary subnet with netmasks of 255.255.255.255. Are you suggesting that this will work (correctly) if all aliases are outside of the primary subnet and have the latter netmask ? I also note that, whilst you can traceroute to any of the addresses with the 240 netmask, you cannot to an alias. This disturbs some domain administrators who like to check your connectivity before delegating a zone to you :-( It's not as bad as getting two answers back but having to explain over and over .. .. michael