Path: csiph.com!usenet.pasdenom.info!weretis.net!feeder4.news.weretis.net!feeds.phibee-telecom.net!newsfeed.xs4all.nl!newsfeed3.news.xs4all.nl!xs4all!newsgate.cistron.nl!newsgate.news.xs4all.nl!post.news.xs4all.nl!not-for-mail Return-Path: X-Original-To: python-list@python.org Delivered-To: python-list@mail.python.org X-Spam-Status: OK 0.077 X-Spam-Evidence: '*H*': 0.85; '*S*': 0.00; 'subject:query': 0.07; 'dependency': 0.09; 'cc:addr:python-list': 0.11; 'python': 0.11; 'localhost': 0.16; 'modul': 0.16; 'outdated': 0.16; 'twisted': 0.16; 'wrote:': 0.18; 'library': 0.18; 'bit': 0.19; 'not,': 0.20; 'seems': 0.21; 'import': 0.22; 'cc:addr:python.org': 0.22; 'header :User-Agent:1': 0.23; 'sends': 0.24; 'skip:` 20': 0.24; 'fairly': 0.24; 'mon,': 0.24; 'looks': 0.24; 'cc:2**0': 0.24; 'cc:no real name:2**0': 0.24; 'query': 0.26; 'code:': 0.26; 'header:In-Reply- To:1': 0.27; 'resolution': 0.29; 'specified': 0.30; "i'm": 0.30; 'requests': 0.31; "skip:' 10": 0.31; '-0700,': 0.31; 'sep': 0.31; 'allows': 0.31; 'linux': 0.33; 'actively': 0.33; 'skip:d 20': 0.34; 'knows': 0.35; 'but': 0.35; 'there': 0.35; 'maintained': 0.36; 'hi,': 0.36; 'two': 0.37; 'project': 0.37; 'server': 0.38; 'handle': 0.38; 'skip:[ 10': 0.38; 'called': 0.40; 'skip:u 10': 0.60; 'easy': 0.60; 'most': 0.60; 'from:charset:utf-8': 0.61; 'simple': 0.61; 'content-disposition:inline': 0.62; 'different': 0.65; '30,': 0.65; 'to:addr:gmail.com': 0.65; 'here': 0.66; 'sample': 0.67; 'lightweight': 0.84; 'michel': 0.84; 'albert': 0.91; 'received:86': 0.91; 'received:hu': 0.93; '2013': 0.98 X-Spam-Flag: NO X-Spam-Score: -1.912 X-Spam-Level: X-Spam-Status: No, score=-1.912 tagged_above=-20 required=4 tests=[ALL_TRUSTED=-1, AWL=0.086, BAYES_00=-1.9, DKIM_ADSP_CUSTOM_MED=0.001, FREEMAIL_FROM=0.001, NML_ADSP_CUSTOM_MED=0.9] autolearn=no Date: Mon, 30 Sep 2013 14:54:41 +0200 From: Ervin =?utf-8?Q?Heged=C3=BCs?= To: Michel Albert Subject: Re: DNS query against a specific server. References: <634fa158-1d15-4a7e-ac0f-7a3f57f55cc7@googlegroups.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <634fa158-1d15-4a7e-ac0f-7a3f57f55cc7@googlegroups.com> User-Agent: Mutt/1.5.20 (2009-06-14) Cc: python-list@python.org X-BeenThere: python-list@python.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: General discussion list for the Python programming language List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Newsgroups: comp.lang.python Message-ID: Lines: 39 NNTP-Posting-Host: 2001:888:2000:d::a6 X-Trace: 1380545720 news.xs4all.nl 15992 [2001:888:2000:d::a6]:42759 X-Complaints-To: abuse@xs4all.nl Xref: csiph.com comp.lang.python:55068 Hello, On Mon, Sep 30, 2013 at 04:42:29AM -0700, Michel Albert wrote: > Hi, > > ``socket.gethostbyname`` sends the DNS resolution query to the DNS server specified by the OS. Is there an easy way to send a query to a *different* server? > > I see that twisted.names allows you to do this, but, having all of twisted as dependency to my project when all I need to do is a simple DNS query seems a bit extreme. I also found pydns, but that looks fairly outdated and unmaintained. > > Is there not an actively maintained lightweight solution? If not, I will go with twisted. > there is a dns modul for Python (I don't know is it part of standard Python library or not), on most Linux distribution you can find it, eg. in Debian it's called python-dnspython. It can handle different nameserver, than OS knows - here is a sample code: import dns.resolver r = dns.resolver.Resolver() r.namerservers = ['127.0.0.1'] # or any other IP, in my case I'm using PDNS, which have two # parts: a recursor and a resolver; recursor allows requests only # on localhost mxservers = r.query("python.org", 'MX').response hth, a.