From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham autolearn_force=no version=3.4.4 X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 103376,b7f81184e76b0532 X-Google-Attributes: gid103376,public X-Google-ArrivalTime: 2003-01-29 09:02:59 PST Message-ID: <3E3808A2.8070902@cogeco.ca> From: "Warren W. Gay VE3WWG" User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.0.2) Gecko/20021120 Netscape/7.01 X-Accept-Language: en-us, en MIME-Version: 1.0 Newsgroups: comp.lang.ada Subject: Re: Ada In Crosstalk References: <3E34330C.62C5A6F0@adaworks.com> <29yZ9.2563$c6.2666@bos-service2.ext.raytheon.com> <3E36C29A.2030302@cogeco.ca> <6gr81b.vh1.ln@jellix.jlfencey.com> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Date: Wed, 29 Jan 2003 12:00:18 -0500 NNTP-Posting-Host: 198.96.47.195 X-Complaints-To: abuse@sympatico.ca X-Trace: news20.bellglobal.com 1043859621 198.96.47.195 (Wed, 29 Jan 2003 12:00:21 EST) NNTP-Posting-Date: Wed, 29 Jan 2003 12:00:21 EST Organization: Bell Sympatico Path: archiver1.google.com!news1.google.com!newsfeed.stanford.edu!nntp.cs.ubc.ca!torn!webster!nf1.bellglobal.com!nf2.bellglobal.com!news20.bellglobal.com.POSTED!not-for-mail Xref: archiver1.google.com comp.lang.ada:33565 Date: 2003-01-29T12:00:18-05:00 List-Id: Vinzent Hoefler wrote: > Dr. Michael Paus wrote: >>Well, I think I can tell difference between a time out and a >>name resolution problem. Here is my answer from nslookup: >> >>Nicht autorisierte Antwort: >>Name: wbmas-stsc1.hill.af.mil >>Address: 137.241.248.34 >>Aliases: www.stsc.hill.af.mil >> >>So you see the name resolution is not the problem. >> >>If I do a ping with the above IP # I never get to the >>target. > > The server does not answer pings, look at this: > > jlfencey@jellix:~> ping www.stsc.hill.af.mil > PING wbmas-stsc1.hill.af.mil (137.241.248.34) from XXX.XXX.XXX.XXX : > 56(84) bytes of data. > > --- wbmas-stsc1.hill.af.mil ping statistics --- > 8 packets transmitted, 0 received, 100% loss, time 7011ms > > But it answers http requests: ... > Vinzent. It is also not unusual for firewalls to reject ping requests, even if you have a webserver available there. Just about any firewall/security book will cover the reasons for it. For that reason, and others, you cannot rely on ping as a reliable indication. -- Warren W. Gay VE3WWG http://home.cogeco.ca/~ve3wwg