4 ms·

Do you really get a new IP every day? Every ISP I’ve had usually gives me the same IP after a restart

• steponlego 4y ago
  You should change the MAC address of your router. That'll trigger the cable or fiber modem to give you a new IP address usually.
  • miked85 4y ago
    For me at least, that means calling support and giving them the new MAC address.
    • xp84 4y ago
      At least in some systems, assuming you have a separate modem device and router, only the modem is involved in the authentication/billing which is where they care about the modem's MAC to identify you. If your router's MAC changes, DHCP would issue it a new IP. My modest understanding is that the modem is operating at a lower layer of the networking stack, so the DHCP server involved in actually issuing you an IP, higher up in the stack, doesn't need to worry about identifying you -- it's happy to give anybody an IP because it knows that if it can see you, the modem-level authentication has confirmed you're someone who is paying your Internet bill. I used to run an open source router a long time ago, which made changing your router WAN MAC something you could easily script.
    • zamnos 4y ago
      Who's your ISP? That would make me worried. https://xkcd.com/463/ https://xkcd.com/463/
      • miked85 4y ago
        Cox. At least in the past when I upgraded a modem, it required me calling support to give them the MAC address.