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2023 - Change Cable Modem IP Address
I have seen several people asking how to change the IP address on their cable modem due to security concerns. I have those same concerns but have NOT seen the question answered anyway. (The discussion gets locked).
Is there a way to change the IP address on the Cox cable modem (unplugging and replugging does nto seem to do the trick).
Please provide a direct answer to this question. If it is not possible with Cox, I will look to change providers as should everyone else.
Thank you.
WiderMouthOpen
Esteemed Contributor III
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3.5K Messages
3 years ago
Do you mean change the IP of the modem(192.168.100.1) or the WAN IP of your router? It's not possible to change the 192.168.100.1 IP address of the modem but you can change your routers WAN MAC address and reboot the modem for a new WAN IP(public IP). What model router for more instructions?
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Darkatt
Honored Contributor
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1.9K Messages
3 years ago
When you ask about changing the IP address, WHAT IP address are you talking about. There is an IP address ont he cable side of the modem, there is an internal address to the modem, and then there is the WAN ip address provided to either the internal router, or the device/router connected tot he ethernet connection of the modem.
That being said, the 192.168.100.1 address tot he modem can only be access to devices connected to the LAN side of the modem. Devices on the WAN side cannot access the 192.168.100, or even the 192.168.1, or 0 address, because the are non routable and ONLY again, accessible on the LAN side of your internet. Devices on the WAN side, cannot access those addresses.
With that being said the only IP address that can be changed is the wan IP address provided to a router connected to a stand alone modem, be either changing it's mac address, or connecting a different router. Changing that address however isn't going to really change things, as it's a wan IP address, and visible to the internet wherever you go. Accessing www.whatismyip.com will give you your wan IP address, unless you are using a VPN.
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WiderMouthOpen
Esteemed Contributor III
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3.5K Messages
3 years ago
I found this support page which mentions how to change your gateways LAN settings, which may have an option how to change the router or gateway IP.
To access the advanced settings, tap on the Connect tab, then See Network. From the My Network screen, tap Advanced Settings. The following options display.
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blackeneth
New Contributor III
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13 Messages
3 years ago
Three things to try:
1. Leave cable modem unplugged for 6.5 hours
2. Leave cable modem unplugged for 24.5 hours
3. Call customer service and ask them to "de-provision" your modem. Then have them "provision" your modem.
Not sure how changing it enhances your security. Security will come from a good firewall. Then you can add a VPN to that.
I find it annoying to have my external IP change -- it messes up some of the rules on my firewall.
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blackeneth
New Contributor III
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13 Messages
3 years ago
Three things to try:
1. Leave cable modem unplugged for 6.5 hours
2. Leave cable modem unplugged for 24.5 hours
3. Call customer service and ask them to "de-provision" your modem. Then have them "provision" your modem.
Not sure how changing it enhances your security. Security will come from a good firewall. Then you can add a VPN to that.
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