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Cannot Ping my Eircom external IP Address

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  • 06-02-2012 10:49pm
    #1
    tranceenigma
    Registered Users Posts: 155 ✭✭


    I have an Eircom - Zyxel P-660HW-T1 v3 modem

    I am looking to set up port-forwarding on this router for a Wireless IP camera so that I can view remotely via the internet.

    When I ping the my Public IP: 86:xx:xx:151 I don't get a reply.

    The modem carries its default settings from day 1 installation.

    Surely I don't need to activate port forwarding in order to ping?

    Any Suggestions??


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    #2
    Dardania
    Registered Users Posts: 3,612 ✭✭✭Dardania


    tranceenigma wrote: »
    I have an Eircom - Zyxel P-660HW-T1 v3 modem

    I am looking to set up port-forwarding on this router for a Wireless IP camera so that I can view remotely via the internet.

    When I ping the my Public IP: 86:xx:xx:151 I don't get a reply.

    The modem carries its default settings from day 1 installation.

    Surely I don't need to activate port forwarding in order to ping?

    Any Suggestions??

    Often times modems don't respond to internet pings by default - the idea being that if anyone notices a device on the internet repsonding to a ping, they could port scan to see if any other services with vulnerabilities are active at that ip

    Check that the modem responds to internet / wan icmp pings in its web interface at 192.168.1.254 . Also, I remember on an old (2004) zyxel modem, you couldn't communicate with the wan ip address / dyndns address from within the lan-most likely they've fixed that by now


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    #3
    tranceenigma
    Registered Users Posts: 155 ✭✭tranceenigma


    Dardania wrote: »
    Check that the modem responds to internet / wan icmp pings in its web interface at 192.168.1.254 .

    Dardina,

    When you say the above what exactly do you mean by this in laymans terms. I guess that does make sense to not been able to ping Public Ipaddresses like that from a security point of view.

    Surely I do not have to register with dyndns in order to achieve this?


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    #4
    duffman85
    Registered Users Posts: 339 ✭✭duffman85


    The manual for that modem is online at ftp://ftp2.zyxel.com/P-660HW-T3_v3/user_guide/P-660HW-T3 v3_3.70_Ed2.pdf

    There is an Anti-probing option under the firewall section in the manual. If it's enabled it won't send a reply when you try to ping it.

    Edit: I think you just need to setup port forwarding for the relevant port to be visible outside your network.

    I'm with UPC so I don't know exactly what the options will be but it'll probably be under Firewall/Security. The options I have are for IP Flood Detection and Port Scan Detection.


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    #5
    tranceenigma
    Registered Users Posts: 155 ✭✭tranceenigma


    duffman85 wrote: »
    The manual for that modem is online at ftp://ftp2.zyxel.com/P-660HW-T3_v3/user_guide/P-660HW-T3 v3_3.70_Ed2.pdf

    There is an Anti-probing option under the firewall section in the manual. If it's enabled it won't send a reply when you try to ping it.

    Duffman

    That PDF you sent is quiet different to the setup of my router. I tried looking at the firewall settings & there is nothing there with regard to anti-probing settings, could this be titled any other way?


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