Cisoc SRP541w - Stopping incoming tpc 5060 traffic from authorized source

Posted on 2014-08-27
Last Modified: 2014-09-11
Hi there,

I have an issue here with a Cisco SRP541, i know this is vendor specific but i'm taking my chances, maybe someone dealt with it before.

I have port forwarding sending traffic on tcp 5060 to my internal digital pbx. I'm getting bombarded with tons of   unauthorized sip registration attempts, I created a rule to deny all access from that source IP and IP subnet but still the registrations go through. Is it that port forwarding takes precedence over Firewall rules?  I can't specify a source in port forwarding so how do I stop it?
Question by:jorge diaz
    1 Comment
    LVL 15

    Accepted Solution

    Two things --

       * The rule needs to be for UDP or BOTH traffic, sounds like you defaulted to TCP traffic --

      * Unless you really need a wide open system the best rule is to white list (permit) the traffic you want (your carrier) and drop everything else.  Otherwise you will be making rules for ever --


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