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From: jlucas@uvi.edu (John Lucas)
Subject: Re: Can't traceroute to virtual hosts
Message-ID: <DrKC8q.HEr@tigger.jvnc.net>
Sender: news@tigger.jvnc.net (Zee News Genie)
Organization: University of the Virgin Islands
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References: <4mhaeg$f8@venus.os.com> <4mjnl4$hgn@paperboy.livenet.net> <4mkakq$51s@uriah.heep.sax.de> <4nd1nv$1cn@anorak.coverform.lan> <4nhq8j$f5p@itchy.serv.net>
Date: Fri, 17 May 1996 18:46:14 GMT
Lines: 33
In article <4nhq8j$f5p@itchy.serv.net>, zeno@serv.net (Sean T. Lamont) wrote:
>>The mask should be 0xffffffff - meaning that anything on this network can
>>be reached down this interface.... ie. only that machine.
>
>From a TCP/IP standpoint, this makes little sense. All bits are significant
>for the network, none for the host? What about IP broadcast for that
>subnetwork? Besides, what's the fundamental difference between a virtual
>host using (as you say) ffffffff and a 'real' host using ffffff00?
>
>I'd been using ffffff00 for virtual IP's and adding a static local
>route to 127.0.0.1. Works fine, except for some minor initial complaints.
>
I too have been using the "real" netmask and it works fine here (tracroute
included).
If you fire up your favorite web browser and peek at:
http://www.uvi.edu/
You will be using a DNS CNAME record pointing to an address on a virtual
interface on FreeBSD v2.1.0-RELEASE. We just moved our web server to new
hardware and new OS (FreeBSD v1.1.5.1 to v2.1) and the virtual interface made
this a painless transistion, since I could build the new machine offline and
replace the old machine with only a few minutes downtime (almost none).
| John Lucas jlucas@uvi.edu |
| Academic Computing NIC Handle: JL423 |
| University of the Virgin Islands (809) 693-1216 |
| St. Thomas, VI 00802 http://www.uvi.edu/jlucas.html |