X-Recipient: archive-cygwin AT delorie DOT com DomainKey-Signature: a=rsa-sha1; c=nofws; d=sourceware.org; h=list-id :list-unsubscribe:list-subscribe:list-archive:list-post :list-help:sender:date:from:to:subject:message-id:references :mime-version:content-type:in-reply-to; q=dns; s=default; b=i4Sa 3zzpLaChN/8ujw6VPaR0SkXeuhQSbrnYSt4CT26CN0eKsllveaE3hp8dAYgQW2wE wtDuoRkqioBXAHWeTDiNiyF5uin3FbXtSJOVRYIXrqjVp6hL+MOrB0nbPbHjyeNn 4209yYF5MIoV7DlA3vLxXn5nawG2UsXqxRp2xpI= DKIM-Signature: v=1; a=rsa-sha1; c=relaxed; d=sourceware.org; h=list-id :list-unsubscribe:list-subscribe:list-archive:list-post :list-help:sender:date:from:to:subject:message-id:references :mime-version:content-type:in-reply-to; s=default; bh=Br4CWOzlaE +6xWiomMN+81YlAvI=; b=ITR0p/CtEfs0wgAoF7FdvEBLHENcSzDBw1q4oQLu5O 5zo3ABWU9+r5Tx/NHw3oCRlnMg8raBOqbH1eDvtndh+N/QDvrSTe8Na4hpRNPVV8 Hb3k5OIVFca5UxrQpT/xWn1cUVeO9Ljj65HFD5CAcGpmdkcKENp4s+VivBMTOjXO Y= Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner AT cygwin DOT com Mail-Followup-To: cygwin AT cygwin DOT com Delivered-To: mailing list cygwin AT cygwin DOT com Authentication-Results: sourceware.org; auth=none X-Virus-Found: No X-Spam-SWARE-Status: No, score=1.3 required=5.0 tests=BAYES_20,LIKELY_SPAM_BODY,RCVD_IN_DNSWL_LOW,SPF_PASS autolearn=no version=3.3.2 spammy=advertising, describing, encounter, whoever X-HELO: mail-wm0-f54.google.com X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:date:from:to:subject:message-id:references :mime-version:content-disposition:in-reply-to:user-agent; bh=0N2+Jfd4PzZOxhYYdIRw+QooQPxHF/0B2arWf6x4zaQ=; b=IgCjJLRYywr5FvkpZ3RsKTTvkvdQ9wRH5f/8T97t7lPg+StwBxLmTBrRV3yjG39Dhm 2hvJ11UCW9cwIy0XlRHPup28knPiigBB8FmJqFMSvexobgbyg3gRqRUp3/nX5iMsqU53 7oMsXcADTIoxGsHNaa8nbpWYqOmTnZoG0pmWTXf/xoMgVs1YIwAEB+jHgkdPegmxerrQ ECT/Qd1JOP9MFwR1Ccjnkgv+6OUFmg9QuQxTCSSrhbyB5oexjzpvQ3qPIJXaiDOLcfZI QX87d6R25OwYltzAbokYaCQv9HvixhMeLfIXzCcRKj+IDiPR8qAfUWQzhV3zL8J7diph 4aMg== X-Gm-Message-State: AD7BkJJOOrwiO7KQrGbXzoJdVEn+LaXaL0556Sn+X7FfW/JlI979V8DqQXUonXfAe80fjg== X-Received: by 10.28.24.130 with SMTP id 124mr24084264wmy.50.1458042200288; Tue, 15 Mar 2016 04:43:20 -0700 (PDT) Date: Tue, 15 Mar 2016 11:43:17 +0000 From: Adam Dinwoodie To: cygwin AT cygwin DOT com Subject: Re: ctrl-c doesn't reliably kill ping Message-ID: <20160315114317.GI29016@dinwoodie.org> References: <56E6F25A DOT 7070000 AT gmx DOT de> <56E75B3E DOT 7020102 AT farance DOT com> <54382838 DOT 20160315140038 AT yandex DOT ru> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <54382838.20160315140038@yandex.ru> User-Agent: Mutt/1.5.21 (2010-09-15) X-IsSubscribed: yes On Tue, Mar 15, 2016 at 02:00:38PM +0300, Andrey Repin wrote: > Greetings, Frank Farance! > > > A little digression, so you understand the background ... The workstation I am > > doing this from is connected to a Verizon router to their FIOS network. Now the > > reason I mention this is that the router's DNS (via DHCP to my workstation) is > > 192.168.1.1, which I presume is forwarded from the router upstream to Verizon's > > DNS caches. So if I type the URL http://something.that.doesnt.exist in my > > browser, rather than getting a Hostname Not Found error (at the name resolution > > level), it actually loads up a page saying "something.that.doesnt.exist" isn't > > found and then I have a Yahoo set of search results on things matching the > > broken hostname. > > > So all of this is normal ISP stuff: they actually resolve unknown addresses to > > their own website (which is 90.242.140.21). > > This is NOT "normal", this is a violation of protocol. > Whoever encounter such behavior should call their ISP and tell them to stop > doing it. It's both normal and a violation of protocol -- a lot of DNS servers, will replace an NXDOMAIN response will "hijack" the query and return something that punts the user onto a search page with advertising. Regardless of how (non-)compliant the system's DNS servers are with the relevant RFCs, ping's behaviour should never be to hang in the way Frank is describing. -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple