Re: Apache/DSL Modem/Port Forwarding

From: Jacob Anawalt (jacob_at_cachevalley.com)
Date: 09/04/03

  • Next message: Roberto Sanchez: "Re: how to right correct /etc/modutils/* ?" 
    Date: Wed, 03 Sep 2003 21:20:23 -0600
To: debian-user@lists.debian.org

    eric lin wrote:

    >--- Elizabeth Barham <lizzy@soggytrousers.net> wrote:
    >
    >
    >>eric writes:
    >>
    >>
    >>> My isp qwest.net assigned dsl modem actiontec R1524SU, accord tech
    >>>support said it use port 80, he said If I am going to broadcast website,
    >>> I need to configure webserver to use other port and config modem to
    >>>forward that port, so I use port 70
    >>>Listen 70
    >>>in httpd.conf
    >>>I tried http://(FQDN) or (public ip):70 it reponse connection refused-if
    >>> no appendix 70, then it show the modem 's configure page
    >>>
    >>> my apache test page still can be accessed by , http://localhost,
    >>>http://127.0.0.1, or http://192.168.0.2(shown in my ifconfig)
    >>>
    >>>
    >>Can you access your Apache test page when httpd.conf is set to "Listen
    >>70" like this:
    >>
    >> http://127.0.0.1:70
    >>
    >>
    >
    >yes, I can access my test page by this way
    >
    >
    >
    >>?. If so, then you may be experiencing a problem related to your DSL
    >>modem.
    >>
    >>
    >>
    >
    >welcome any softer soln so I can save a little money to rent static ip.
    >actiontec tech support told me port 80 be used by that dsl/router
    >
    >

    eric lin wrote:

    >--- Elizabeth Barham <lizzy@soggytrousers.net> wrote:
    >
    >
    >>eric writes:
    >>
    >>
    >>
    >>>>If so, then you may be experiencing a problem related to your DSL
    >>>>modem.
    >>>>
    >>>>
    >>>welcome any softer soln so I can save a little money to rent static
    >>>ip. actiontec tech support told me port 80 be used by that
    >>>dsl/router
    >>>
    >>>
    >>You mentioned Port Forwarding in your original email so if your DSL
    >>modem is capable of doing that then it may work.
    >>
    >>Keep in mind, however, that the reverse action from your side of the
    >>modem may not be what others see; it may be working but you can't see
    >>it. After you set up port forwarding on your DSL modem then you may
    >>want to ask a friend or someone with a different net IP address to try
    >>and report what he or she sees.
    >>
    >>Elizabeth
    >>
    >>
    >
    >thanks your reply again,
    >
    >I went to portscan.com, check my httpd header, it response can not find, so I guess if I can not see my website powered by my own pc, it also can not be access by outsider.
    >
    >
    >
    Let me see if I understand what you are saying.

    Qwest said here's your static IP, but btw we're using port 80 for
    configuring the DSL modem, so you'll have to use another port for web
    traffic.

    The DSL modem has the public ip address and your computer only has a
    private network address (eg 192.168.0.2) and you can configure your DSL
    modem to forward packets.

    You are able to browse to any of the following: http://127.0.0.1/,
    http://127.0.0.1:70/, http://192.168.0.2/ and http://192.168.0.0:70/

    You can browse the web and send email from this computer right? If so,
    then routing is most likely set up correctly.

    Are you sure that you have entered the port 70 forward properly into the
    dsl modem configuration?

    The DSL modem config page should indicate that it is forwarding tcp
    traffic on port 70 to your web server on port 70 (you might be able to
    forward it from port 70 to port 80 on your web server and not add the
    extra Listen directive, I don't know how flexible your modem's web admin
    is).

    I wasn't impressed with www.portscan.com. Their 'HTTP headers' test
    might only look for responses on port 80. Since the page I saw didn't
    have a port number field, I doubt it's checking for a webserver on port
    70. Do you know someone on another computer with telnet? They could
    attempt to telnet to your.qwest.public.ip port 70 and see if they get
    connection refused or if they can type GET /<return> and get a response.

    As an aside, port 70 is gopher. How about binding to port 8080, 8008,
    or some other port above 1024 that isn't listed in your /etc/services
    file. It's not that big of a deal, but the 8008 or 8080 for non port 80
    http traffic is fairly common. What would be even nicer is if your dsl
    modem has a configuration to change it's config page port. Many do. On
    reset it is back at port 80, but then you can change it to be port 8008
    or whatever, then after saving that change and connecting to the web
    admin page on the new port, configure it to forward port 80 to your
    computer. That way you don't have to have people type in the port number.

    Jacob 

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