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Stopped someone from getting on your wifi?


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but if you turn it off then your cable company might not be able to access your modem if you ever needed help but they only can go into it with your permission to help you fix something with the router but not 100% sure as ive never tried it with my old motorola docsis 3.0 gateway modem from my cable company

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ISPs don't go through the Front Door.  If they provide an appliance, they have most likely already enabled a backdoor utilizing TR-069 or some other standard.

 

It is TCP ports 80, 8080 or 445 (HTTP/HTTPS) or 23 (Telnet ) or 992 (Telnet/S) that one disables for remote management.

 

If an ISP puts in a backdoor and you know the TCP port, the user can create a 1Firewall Drop Packets rule.

 

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1.  Verizon uses TCP port 4567.  However in later Firmware versions they actually have an anti block rule that won't allow the user to create a rule to specifically block that port.  Their appliances will generate an error message indicating you can't do it for that port.

 

Other known backdoor ports are TCP/6363  and TCP/2420.

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