There have been a number of reports of the SRP500 becoming unresponsive after a period of use.
Symptoms have included, but are not limited to:
No web access to GUI
Port forwarding stops
DNS proxy fails
Thanks to all of you that have provided feedback and advice, this had helped us to isolate the issue, which we are now working hard to fix. Specifically, remote attacks against the voice ports are causing the failure of various device services.
In the mean time, it is possible to protect your SRP from these issues by configuring one of both of the following parameters.
Firstly, configure your device to accept only SIP messaging from configured voice services.
To achieve this, log in using the admin user role and select the "Voice" configuration tab.
Select "Line 1" and scroll to "SIP Settings", then set "Restrict Source IP" to yes.
Repeat this configuration for Line 2.
In addition, if you are not using the voice ports on your SRP, it is good practice to disable them. To do this, set "Line Enable" to no for both lines.
One settings have been made for both lines, click on Submit at the bottom of the screen.