16/04/2020 Netgear FVS338. Downgrade the firmware to version 3.0.4-19. This version does not have SIP/ALG support. This *should* allow you to register properly. Note: There is a Beta version of the firmware: 3.0.5-27. This version has a SIP tab which allows you to turn off the SIP ALG. NOTE: The information provided above is from another OnSIP customer offering these settings for other customers with a Set NAT Security to Open and Disable SIP ALG. Log in to the router and open NAT Security. Find WAN Settings under WAN Setup. Set WAN Security to Open and check the box to Disable SIP ALG. Click Save. This can result in ghost calls on port 5060. To prevent this, Port Forward 5060 to an unused IP address outside of your DHCP range, if possible. Also, in this version of the firmware there is no option to disable the "SIP ALG" so the "NAT Filtering" option must be set to "open". In other versions it mentions "Disable SIP ALG" with the box checked.

SIP ALG can be named SIP Transformer, SIP Helper, SIP Guide, or other various names. SIP ALG is not always found in the GUI of the device, in some cases you may have to SSH or Telnet into the device to turn it off. SIP ALG can exist on your Modem or Firewall. If you are using a modem/router in bridge mode it can still intercept and transform these messages if you did not turn it off prior to

SIP ALG (Application Layer Gateway) is a feature which is enabled by default in most Netgear routers and inspects VoIP traffic as it passes through and modifies the messages on-the-fly. In few situations this is useful, but in most situations SIP ALG can cause problems using the service. Very often, SIP ALG is poorly implemented causing VoIP

Comcast Netgear Gateway Model CG3000 DCR - will not allow customer to disable SIP ALG. The only true way to work around this is to place the CG3000 into bridge mode and then place a router/firewall behind it. *(note, we have seen sites that made this change and still encountered issues, suspicion is that it does not function in a true bridge mode. Some sites had to replace with a regular modem.)

Hello, I work for a VoIP provider and am home for the quarantine. For some reason, I cannot get my Polycom phone to play nice with the XR500. Looking at packet captures from the proxy where the phone is trying to REGISTER with, the register never arrives. I already have SIP ALG disabled, NAT filte 16/04/2020 Netgear FVS338. Downgrade the firmware to version 3.0.4-19. This version does not have SIP/ALG support. This *should* allow you to register properly. Note: There is a Beta version of the firmware: 3.0.5-27. This version has a SIP tab which allows you to turn off the SIP ALG. NOTE: The information provided above is from another OnSIP customer offering these settings for other customers with a

Hello, I work for a VoIP provider and am home for the quarantine. For some reason, I cannot get my Polycom phone to play nice with the XR500. Looking at packet captures from the proxy where the phone is trying to REGISTER with, the register never arrives. I already have SIP ALG disabled, NAT filte

Set NAT Security to Open and Disable SIP ALG. Log in to the router and open NAT Security. Find WAN Settings under WAN Setup. Set WAN Security to Open and check the box to Disable SIP ALG. Click Save. This can result in ghost calls on port 5060. To prevent this, Port Forward 5060 to an unused IP address outside of your DHCP range, if possible.

12 Apr 2016 Netgear DG834G Current Status: Compatible after Changes, Recommendation: Disable SIP ALG Comments: The DG834G is a wired router 

Set NAT Security to Open and Disable SIP ALG. Log in to the router and open NAT Security. Find WAN Settings under WAN Setup. Set WAN Security to Open and check the box to Disable SIP ALG. Click Save. This can result in ghost calls on port 5060. To prevent this, Port Forward 5060 to an unused IP address outside of your DHCP range, if possible.