Since dial-up I was used to having a dynamic IP, but now that I'm on cable it's static. Someone told me that restarting the modem after a shut-off will give me a new IP, but it appears to be same one I had before.
I'd like a dynamic IP. How can I change it?
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Apple stores visited: Soho, Garden City, Pasadena, San Francisco, 5th Avenue, Honolulu
If you really do have a static IP then no amount of restarting the modem will change it. Usually you pay _extra_ for a static IP because of its value for remote access. Why do you want a dynamic IP anyway? There is nothing more or less secure about it...
If you really do have a static IP then no amount of restarting the modem will change it. Usually you pay _extra_ for a static IP because of its value for remote access. Why do you want a dynamic IP anyway? There is nothing more or less secure about it...
I need a dynamic IP to browse more anonymously at certain sites. The IP may have changed when I restarted my modem because I didn't write down the number entirely during my last connection. I only took note of the first and last numbers, and saw them again when I restarted the modem. I'll try this again, after first jotting down the whole IP.
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Apple stores visited: Soho, Garden City, Pasadena, San Francisco, 5th Avenue, Honolulu
I have a feeling you likely have a dynamically assigned IP. Check your lease time.
Dynamic IPs on cable/DSL are more likely to stay the same over longer periods due to the way addresses are dished out to clients. With the service "always on", and a lease time normally of a few days or longer, it is more than likely that if you shut off your machine for the night, when it requests a new IP the next day, it is likely to get the same IP address in the lease again, as the MAC address of the cable modem, and the network card requesting the address match the lease server.
This aspect of using a dynamic IP to browse more anonymously to certain sites is a bit misleading too. Most always-on connections, as mentioned before, keep the same IP address for long periods. As far as the web hosts are concerned, they will only see a request coming in from a certain IP from an ISP. If you are concerned with IP attacks coming from the website, get a broadband router/firewall to protect yourself from inbound connections.
(Actually, get one regardless - hackers will try and log in to any open socket possible along any number of IP blocks that the broadband ISP carries)
Like the others, I highly doubt that your IP address is static as most cable ISPs use DHCP. Chances are the lease is just longer than you're used to.
Generally, you can't change your IP address, your ISP is in control of that. Your ISP is control of whether you get a static or dynamic IP address and the lease time.
I need a dynamic IP to browse more anonymously at certain sites.
This isn't really the case. Most major ISPs keep detailed logs of information that can tie an IP address the the account and network device (computer, router, VoIP device, etc.) leasing the IP at a given time.
Of course, that kind of information would probably only go out with a warrant or subpoena, so I guess it comes down to what you need anonymity for...
In my own experience, ISPs like Sympatico, using PPPoE, tended to change my IP address every couple days. And turning the modem (or router) off and on would be about a 50/50 chance of getting a new IP address immediately.
With cable ISPs however, even though they use DHCP, the IP address could remain unchanged for months, even years. I was with Rogers High Speed for about 3 years originally, and my IP address changed only once in that time. I have a customer who's been with Rogers for 3 or 4 years now and their IP address has changed only twice so far.
A Rogers tech once told me that their IP addresses were 'pseudo-static'. I don't know if this is true today, but at the time, he said that they were basicaly static IP addresses since there was nothing in the system that would cause an IP address to change, short of physical changes to the DHCP servers in your area. That was certainly the case when I was with Rogers. The one time my IP changed was when they upgraded the equipment in the neighborhood.
-Stephanie
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She who laughs last -- probably made a back-up.
Most large-scale DHCP solutions will favour the same IP to same MAC address, provided the MAC is still active (means less work server-side with changing DNS reverse lookups, new mapping/routings, etc.) Thus, with always-on service, dynamic plans typically keep the same IP for long periods.
This is very interesting, and I'm learning a lot from your responses. My friend told me that the IP changes every time the modem syncs anew with the server, but I'll tell him it isn't so.
I would like to mask my IP sometimes, as I surf a lot. I dump cookies every few days which helps a little, but I constantly get loan spams with my first name and age in the subject line. I get targeted advertising when I surf to a new page. I have nothing nefarious planned, but I'd like a little bit of privacy when I surf.
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