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Cable modem/router firewall blocks VOIP signal

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#1 GoshenBleeping


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Posted 11 October 2016 - 10:07 AM

Computer:  Microsoft Windows 7 Home Premium 64 bit
Laptop:  ASUS K52F
Cable modem/router from COX:  UBEE DDW365
VOIP system from Pioneer Telephone

I have always had the cable modem/router internal firewall IPV4 protection set to "low" so that no 'ports' (to use the modem firewall's terminology) were restricted.  This morning I tried setting the modem/router firewall protection to "medium" or "high".  In both these cases, my phone stopped working.  That is I could not receive incoming calls, nor could I make outgoing calls.

Question:  Is there a way to configure the cable modem/router so that I could set the firewall IPV4 protection to medium or even high?  I have attached a screen shot of the "advanced" modem settings that I can change.  SIP is currently disabled - this is required by Pioneer Telephone.  I tried disabling WAN and Net2Phone - no difference.

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