How often is the public ip for residential changed on xfinity?

[Xtreme Gamer]

How often is the public ip for residential changed on xfinity?

[TheKDub]

Not very often, I believe I've had the same IP for over a year now.

Fairly sure you can cause it to change by disconnecting your modem, waiting a few minutes, and reconnecting it, not entirely sure though. (Could probably also ask support, but not like they can do anything other than push buttons)

[abhiflares]

I don't think any ISP would change Public IP's for no major reason,

they cost a fair bit of money, are you sure it's not your Private IP that has changed?

[Xtreme Gamer]

5 minutes ago, abhiflares said:

I don't think any ISP would change Public IP's for no major reason,

they cost a fair bit of money, are you sure it's not your Private IP that has changed?

 

I was only curious because i just now figured out how to remotely manage my router.

[abhiflares]

10 hours ago, Xtreme Gamer said:

 

I was only curious because i just now figured out how to remotely manage my router.

 

 

I wouldn't mess with my router if there was nothing wrong with it, especially with the settings for Public IP, 

it would only cause you trouble.

[brwainer]

The way DHCP works is that when a device sends out a Discovery packet asking for what DHCP servers are out there, it can also provide it's preferred IP address, which is normally the last IP it had or the one it has right now. Usually this preferred IP will be granted unless there is some other circumstances. The server also keeps tracks of DHCP leases, which is how it doesn't give the same IP out twice. Most servers are set up to give a DHCP client the same IP as before when they renew their lease while the server still has the lease in memory.

 

Basically, while your IP address *could* change every day or few days, both the client and the server have mechanisms that tend to have you keep the same IP for a long time.

[ultimatemythbuster]

If you want to be able to manage your router remotely, I would suggest setting up Dynamic DNS and a VPN server that way you can remote into your LAN and manage the router from the LAN side.  Opening your router configuration to the WAN interface usually exposes numerous security vulnerabilities.

[Donut417]

21 hours ago, TheKDub said:

Not very often, I believe I've had the same IP for over a year now.

Fairly sure you can cause it to change by disconnecting your modem, waiting a few minutes, and reconnecting it, not entirely sure though. (Could probably also ask support, but not like they can do anything other than push buttons)

Also it will change if a different mac address is connected.