Article View: microsoft.public.windows.networking.firewall
Article #2Re: Testing Open Ports
From: Brian Cryer
Date: Tue, 15 Dec 2009 09:15
Date: Tue, 15 Dec 2009 09:15
34 lines
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3687 bytes
"2Sweet" <chongcmw@hotmail.com> wrote in message news:O065S2PfKHA.4952@TK2MSFTNGP06.phx.gbl... > Ok, i will check the firewall rule again. > Telnet/cryping test the "outbound traffic" from application server to the > internet remote web server. > How to test the "inbound traffic" is allow??? The important thing is that you are testing it in the direction that your application will be using it. So if you are testing from your application server to the remote server (which I think you've said in another post), so the same "direction" as your application, then that is all you should need to worry about - assuming that there are no other ports involved!! (which there are for some protocols such as FTP.) If you can telnet or cryping to those ports then it shows that something is listening and that you are making a connection. From what you've said so far makes me think that it isn't a firewall issue. A couple of things which might be worth double checking (probably fine, but worth a check): 1. That the IP address of the remote server is correct. Using the wrong IP address (or DNS name or having a problem with DNS) could mean you are trying to connect to the wrong server which might cause problems. Even if this all works fine from the command line, double check that your application is connecting using the correct IP address or DNS name. 2. Check that any NAT (on the remote end probably) is correct for each of the ports - just to be sure that when you connect on say port 443 that it is being routed internally to the correct server on the correct port. This is probably not going to be an problem if this is an externally hosted server. -- Brian Cryer www.cryer.co.uk/brian
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X-Google-Thread: 4e777fa27a,43aecff33160675d X-Google-Attributes: gid4e777fa27a,public,usenet X-Google-NewGroupId: yes X-Google-Language: ENGLISH,ASCII-7-bit Path: arc1-ca.pugleaf.net!g2news1.google.com!news2.google.com!npeer01.iad.highwinds-media.com!news.highwinds-media.com!feed-me.highwinds-media.com!Xl.tags.giganews.com!border1.nntp.dca.giganews.com!nntp.giganews.com!local2.nntp.dca.giganews.com!nntp.pipex.net!news.pipex.net.POSTED!not-for-mail NNTP-Posting-Date: Tue, 15 Dec 2009 03:16:00 -0600 From: "Brian Cryer" <not.here@localhost> Newsgroups: microsoft.public.windows.networking.firewall,24hoursupport.helpdesk References: <fe3c624c-27ad-4526-a137-3b6a435fea47@v37g2000prg.googlegroups.com> <NcSdnbMa0IfLX1jXnZ2dnUVZ8m2dnZ2d@pipex.net> <#NYWeoBfKHA.5568@TK2MSFTNGP02.phx.gbl> <vtudnTSOQsUWmbvWnZ2dnUVZ8hednZ2d@pipex.net> <15mdndBMOvEpmLvWnZ2dnUVZ8ladnZ2d@pipex.net> <O065S2PfKHA.4952@TK2MSFTNGP06.phx.gbl> In-Reply-To: <O065S2PfKHA.4952@TK2MSFTNGP06.phx.gbl> Subject: Re: Testing Open Ports Date: Tue, 15 Dec 2009 09:15:58 -0000 MIME-Version: 1.0 Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=response Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Newsreader: Microsoft Windows Mail 6.0.6002.18005 X-MimeOLE: Produced By Microsoft MimeOLE V6.0.6002.18005 Message-ID: <YtmdnQ08nqlNzrrWnZ2dnUVZ8kednZ2d@pipex.net> Lines: 35 X-Usenet-Provider: http://www.giganews.com NNTP-Posting-Host: 84.12.141.112 X-Trace: sv3-dpHflSIoy0AcPN42YgijXYrMvDbZT8PQBNhMY0NolpTcTebywdovdLNXBOnimnpsx7Ip0IRA/CAE7Tp!aD7gbfjTaLHwYV5OcyTsbCpNhzC3XDA/kf3bTXcjn7aWORsK6cH4UQWKaQuUEV+oAtavyM7M5XB4!p71par7G5LXdcB7KG+HzVyk= X-Complaints-To: abuse@dsl.pipex.net X-DMCA-Complaints-To: abuse@dsl.pipex.net X-Abuse-and-DMCA-Info: Please be sure to forward a copy of ALL headers X-Abuse-and-DMCA-Info: Otherwise we will be unable to process your complaint properly X-Postfilter: 1.3.40