topic Re: Reflexive NAT not working for UDP traffic in Spark Firewall (SMB)

Reflexive NAT not working for UDP traffic

tamzida — Mon, 25 Jul 2022 11:51:10 GMT

Hello,

In case UDP traffic of SIP service and other services reflexive NAT not working automatically.If I configure reflexive NAT manually the it is working.But since there is many IP phones natted with a single IP , manual configuration is not a solution.Can anyone suggest any option.

Thanks

Re: Reflexive NAT not working for UDP traffic

Chris_Atkinson — Tue, 26 Jul 2022 03:07:00 GMT

Alot of work has gone into improving the VoIP experience in recent releases (sk176295), which version is the Gateway installed with?

Re: Reflexive NAT not working for UDP traffic

tamzida — Wed, 27 Jul 2022 11:37:03 GMT

Quantum Spark 1600, version R80.20.35

My observation is that when configure only hide NAT UDP session not operational properly but if configure reflexive NAT for a single IP phone then this phone is fully operational.My observation is may be UDP traffic cannot track properly in hide NAT.

Re: Reflexive NAT not working for UDP traffic

Chris_Atkinson — Thu, 04 Aug 2022 00:57:34 GMT

Did you use the VoIP wizard to guide your configuration?

It was introduced starting in R80.20.35 though R80.20.40 is probably the recommended version at this time pending R80.20.50.

Re: Reflexive NAT not working for UDP traffic

Chris_Atkinson — Thu, 04 Aug 2022 00:56:38 GMT

Please note R80.20.50 (sk179654) was recently released with the following enhancements:

VoIP enhancements

Allows bidirectional traffic with the SIP service provider.
Extend SIP service timeout.