Re: sockets: bind to external interface

Path	csiph.com!x330-a1.tempe.blueboxinc.net!usenet.pasdenom.info!news.albasani.net!news2.arglkargh.de!feeder.erje.net!newsfeed.xs4all.nl!newsfeed6.news.xs4all.nl!xs4all!post.news.xs4all.nl!not-for-mail
Return-Path	<rosuav@gmail.com>
X-Original-To	python-list@python.org
Delivered-To	python-list@mail.python.org
X-Spam-Status	OK 0.020
X-Spam-Evidence	'H': 0.96; 'S': 0.00; 'socket': 0.05; 'correspond': 0.07; 'involves': 0.07; 'bind': 0.09; 'interfaces': 0.12; 'server,': 0.12; 'am,': 0.14; 'wrote:': 0.14; 'common.': 0.16; 'subject:interface': 0.16; 'wanted.': 0.16; 'tue,': 0.20; 'work,': 0.20; 'header:In-Reply-To:1': 0.22; 'wonder': 0.24; 'there.': 0.26; "i'm": 0.26; 'chris': 0.27; 'message- id:@mail.gmail.com': 0.28; 'external': 0.29; 'server': 0.29; 'assuming': 0.29; 'all.': 0.30; 'binding': 0.31; 'to:addr:python- list': 0.32; '...': 0.32; 'sometimes': 0.33; 'there': 0.35; 'addresses': 0.36; 'received:209.85': 0.37; 'apr': 0.38; 'received:google.com': 0.38; 'less': 0.38; 'port': 0.38; 'used': 0.38; 'though': 0.38; 'to:addr:python.org': 0.39; 'received:209': 0.39; "it's": 0.40; 'header:Received:5': 0.40; 'address': 0.61; '2011': 0.62; 'care': 0.67; '26,': 0.68; 'traffic': 0.71; 'received:209.85.210.174': 0.84; 'received:mail- iy0-f174.google.com': 0.84; 'aka': 0.91
DKIM-Signature	v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:in-reply-to:references:date :message-id:subject:from:to:content-type:content-transfer-encoding; bh=R3CE2oNqjYV9L9detSPNmmA+/3zoykdkSog4bSEHYpw=; b=hp5SIec1hZDeqQZ6uk06/m61Ji8SseHcDWz5mok0r6fkSKUSWcmrzBmA7N50GIoVAC h/3rSxdz2Nz9l3dZDH4Y75K2fe3dPz4YerYe4z3LIGNF/Xnu6WUqzohwFX9l+N5C40NM Hi9ITttvgEwR9lA+0lR1g1iQlGRQ4LmA4Rim4=
DomainKey-Signature	a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type:content-transfer-encoding; b=tSFEW+isb9StRs5yKWGrqPNnsW2u0Esulipt0Lq1sqhKitWEaDDtA1xYcRfnECzurW NwmmZELZgi5Val5JGrIBcwA1GDAKJ9FFeGZFFwtrBUPepR9cnT+1vTAXhLQtus+O9osB Kv14F8rDTs5xtouWvT7tyPOea5u7kZET1h074=
MIME-Version	1.0
In-Reply-To	<ra1h88-e0u.ln1@svn.schaathun.net>
References	<k4vg88-0tt.ln1@svn.schaathun.net> <mailman.815.1303760950.9059.python-list@python.org> <ra1h88-e0u.ln1@svn.schaathun.net>
Date	Tue, 26 Apr 2011 06:30:59 +1000
Subject	Re: sockets: bind to external interface
From	Chris Angelico <rosuav@gmail.com>
To	python-list@python.org
Content-Type	text/plain; charset=ISO-8859-1
Content-Transfer-Encoding	quoted-printable
X-BeenThere	python-list@python.org
X-Mailman-Version	2.1.12
Precedence	list
List-Id	General discussion list for the Python programming language <python-list.python.org>
List-Unsubscribe	<http://mail.python.org/mailman/options/python-list>, <mailto:python-list-request@python.org?subject=unsubscribe>
List-Archive	<http://mail.python.org/pipermail/python-list>
List-Post	<mailto:python-list@python.org>
List-Help	<mailto:python-list-request@python.org?subject=help>
List-Subscribe	<http://mail.python.org/mailman/listinfo/python-list>, <mailto:python-list-request@python.org?subject=subscribe>
Newsgroups	comp.lang.python
Message-ID	<mailman.816.1303763462.9059.python-list@python.org> (permalink)
Lines	20
NNTP-Posting-Host	82.94.164.166
X-Trace	1303763462 news.xs4all.nl 81483 [::ffff:82.94.164.166]:50297
X-Complaints-To	abuse@xs4all.nl
Xref	x330-a1.tempe.blueboxinc.net comp.lang.python:3995

Show key headers only | View raw

On Tue, Apr 26, 2011 at 6:14 AM, Hans Georg Schaathun <hg@schaathun.net> wrote:
> :  The way you talk of "the" external interface, I'm assuming this
> :  computer has only one. Is there a reason for not simply binding to
> :  INADDR_ANY aka 0.0.0.0?
>
> Ah.  That's what I really wanted.  Thanks a lot.  I wonder why that
> was not mentioned in the tutorial I used ...

If you don't care what port you use, you don't need to bind at all.
That may be why it's not mentioned - the classic TCP socket server
involves bind/listen/accept, and the classic TCP client has just
connect; bind/connect is a lot less common.

Incidentally, interfaces don't have to correspond 1:1 to network
cards. At work, we have a system of four IP addresses for each server,
even though it has only one NIC - it's used for traffic management and
routing. Binding to a specific address is sometimes important there.

Chris Angelico

Back to comp.lang.python | Previous | Next — Previous in thread | Next in thread | Find similar

Thread

sockets: bind to external interface Hans Georg Schaathun <hg@schaathun.net> - 2011-04-25 20:37 +0100
  Re: sockets: bind to external interface Chris Angelico <rosuav@gmail.com> - 2011-04-26 05:49 +1000
    Re: sockets: bind to external interface Jean-Paul Calderone <calderone.jeanpaul@gmail.com> - 2011-04-25 13:13 -0700
    Re: sockets: bind to external interface Hans Georg Schaathun <hg@schaathun.net> - 2011-04-25 21:14 +0100
      Re: sockets: bind to external interface Hans Georg Schaathun <hg@schaathun.net> - 2011-04-25 21:24 +0100
        Re: sockets: bind to external interface Chris Angelico <rosuav@gmail.com> - 2011-04-26 07:21 +1000
      Re: sockets: bind to external interface Chris Angelico <rosuav@gmail.com> - 2011-04-26 06:30 +1000
        Re: sockets: bind to external interface Thomas Rachel <nutznetz-0c1b6768-bfa9-48d5-a470-7603bd3aa915@spamschutz.glglgl.de> - 2011-04-25 23:18 +0200
          Re: sockets: bind to external interface Chris Angelico <rosuav@gmail.com> - 2011-04-26 07:50 +1000
          Re: sockets: bind to external interface Hans Georg Schaathun <hg@schaathun.net> - 2011-04-26 06:20 +0100
      Re: sockets: bind to external interface Thomas Rachel <nutznetz-0c1b6768-bfa9-48d5-a470-7603bd3aa915@spamschutz.glglgl.de> - 2011-04-25 23:14 +0200
  Re: sockets: bind to external interface Jean-Michel Pichavant <jeanmichel@sequans.com> - 2011-04-26 11:24 +0200

csiph-web