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Forum Discussion
rickey1253
Jun 22, 2021Follower
CM500-unblocking ports
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 ...
FURRYe38
Jun 22, 2021Guru - Experienced User
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
Jun 22, 2021Guru - Experienced User
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).