Opening Ports For VoIP

Posted on 2011-05-12
Last Modified: 2012-05-11
My mother has recently switched her Internet service from Frontier to Comcast. They provided her with an Arris wbm760a modem and a Netgear router (sorry don't have the model). Her VoIP is through light year and she has a VoIP router that they provided. Ever since she switched service she has been unable to use her phones on the VoIP. Lightyear told her she needed to have ports 69, 5060-5075, and 16384-16392 opened. I am assuming this is done on the netgear router. Anyway, I went in and used port forwarding to opend those ports but I was unsure what the IP address should be so I used The router is Even after doing that the phones still don't work. Please help.

Thank you!

Question by:RobertEhinger
    LVL 7

    Accepted Solution

    Normally, you may put the VoIP box outside of your home firewall. That is, connect your Internet connection to the box's Internet port, then connect your firewall's Internet port to the LAN port of the VoIP box. In other words, put the VoIP box in the middle.

    However, if you do want to put the VoIP box behind the firewall, you may use Port Forwarding to open the specific ports to the VoIP box. In this case, the internal IP for Port Forwarding should be the IP address of your VoIP box.

    Does it make sense?
    LVL 9

    Expert Comment

    You shouldn't have to change anything on your firewall.  I would assume that this is an IP configuration issue.

    Can you give us all of the IP addresses involved?  I don't need the external one from the Netgear router, but I would need the internal one.  I also need to know if DHCP is turned on on the Netgear.  If you can get into the configuration of the VOIP device, let me know what the networking settings are for that.  Usually they are set as dynamic.  If not, change it to dynamic. That might fix the problem.

    LVL 9

    Expert Comment

    @peea, @RobertEhinger Putting the VOIP device first and the Netgear second might solve the problem.  However, the phone company might require the specific mac address of the Netgear, in which case it would have to be configured on the VOIP device (if possible).

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