CM500-unblocking ports

[rickey1253]

I have installed Norton and contacted them because I could not use the VPN.  They ran a scan and suggested that I contact my Internet Provider and request that UDP Ports 500 & 4500 be unblocked.  Is this possible?

[FURRYe38]

I would if the CM modem had a built in router however the CM is only a modem only. Nothing to configure on this modem.

To Configure ports, you'll need to consult the mfr of your wifi router thats connecte to the CM modem for this. 

[schumaku]

Beyond, some el-cheepo ISP assign Carrier Grade NAT (CGN; RFC6598)  or RFC1918 private IP addesses to your router ... this will prohibit using a VPN (or reach the address on an port).