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Port scanning on 5060 and Security

Discussion in '3CX Phone System - General' started by IrvineCAGuy, Feb 17, 2014.

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  1. IrvineCAGuy

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    Trying to track down why my 3CX Ver 12 periodically fails to register with the SIP provider, causing a busy-signal for incoming calls.
    I replaced the DSL router with a new version that reports attempted port scans and DoS attacks. Within minutes I'm getting a flurry of reports. Many Source IPs are coming from various European countries:

    UDP Packet - Source:53.217.61.xxx,42381 Destination:216.175.xx.yyy,53 - [DOS] UDP Packet - Source:109.77.156.190,29531

    I am not (yet) familiar with these UDP Packet reports so my question is: is this normal to have the firewall banged on by would-be hackers and my PBX is safe, or is this something I should be concerned about from a security or Denial of Service perspective?
     
  2. craigreilly

    craigreilly Well-Known Member

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    What is your internet provider?
    Is it a commercial DSL account?
     
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