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?
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?
