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  • IT guys and computer nerds I have a question?

    What keeps causing all my devices on my router to keep changing ip addresses? I am aware that I dont have a static ip and that it costs money to have. The power went off a few times the other day and one of the times I notices it had rearranged my pcs ip addresses again.

    Is it related to power outages or rebooting? Should I put a ups on my router? Or put one on the dvr? Problem is I have a dvr that keeps changing its damn ip so I have to keep editing the forwarded ports via the router to be able to access it each time it decides to change the ip.

    It just keeps changing the last digit of all my computers and its screwing up my network magic program because the stupid thing thinks the old ip number is still what it was and its not.
    Last edited by Pandemonium; 10-10-2011, 07:25 PM.

  • #2
    A UPS would definitely help with the short outages. Check with your service provider, I have run across several that include 1 or sometimes 2 IPs with your account. They just don't advertise it. If you go to your account manager sometimes you can turn them on by yourself and see what the address is. Then set your DVR to that IP and you should be fine.
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    Whoa O Black Betty Bam-Ba-Lam!

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    • #3
      Originally posted by Ron V View Post
      A UPS would definitely help with the short outages. Check with your service provider, I have run across several that include 1 or sometimes 2 IPs with your account. They just don't advertise it. If you go to your account manager sometimes you can turn them on by yourself and see what the address is. Then set your DVR to that IP and you should be fine.
      My main ip seems to stay the same, its everything on the router that change, I dont mind all but the dvr changing. Am I lost? lol

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      • #4
        What keeps making your IP addresses change is DHCP (Dynamic Host Configuration Protocol). If a device does not have a static IP, a DHCP server, in this case your router, is giving them an address. But usually the lease time is long enough that even a power outage should not cause them to get a different address. These are private IPs on your side (LAN) of the network, not public IPs on the Internet (WAN) side.

        Depending on your router, you can assign a range that it will use for the DHCP pool and assign static IPs outside this range. You could assign statics to the devices on your network that you don't want to change. You must also assign a gateway, a subnet mask, and DNS server but these are easy to determine based on what the DHCP server is giving the devices now.

        I can tell you more later, if you're interested. I have to go slice my tri tip now.

        Dave
        Last edited by DDave; 10-10-2011, 08:43 PM.
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        • #5
          Originally posted by DDave View Post
          What keeps making your IP addresses change is DHCP (Dynamic Host Configuration Protocol). If a device does not have a static IP, a DHCP server, in this case your router, is giving them an address. But usually the lease time is long enough that even a power outage should not cause them to get a different address. These are private IPs on your side (LAN) of the network, not public IPs on the Internet (WAN) side.

          Depending on your router, you can assign a range that it will use for the DHCP pool and assign static IPs outside this range. You could assign statics to the devices on your network that you don't want to change. You must also assign a gateway and DNS server but these are easy to determine based on what the DHCP server is giving the devices now.

          I can tell you more later, if you're interested. I have to go slice my tri tip now.

          Dave

          Huh???



          .
          Ken


          I Should Have Been Rich Instead Of Being So Good Looking

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          • #6
            Im with you on the first paragraph and halfway through the second, thanks Dave

            Sent from a cell phone that is way cooler than yours!! Eat It!! $

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            • #7
              Originally posted by Texas-Hunter View Post
              Huh???
              I can walk him through it. He's already doing port forwarding on the router so it shouldn't be too difficult.

              Dave
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              • #8
                Originally posted by DDave View Post
                I can walk him through it. He's already doing port forwarding on the router so it shouldn't be too difficult.

                Dave
                LOL I hope so

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                • #9
                  Eat your tri tip, dont worry bout my crap tonight

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                  • #10
                    Here is the section of my router configuration screen that has to do with DHCP.



                    My router's IP address is 192.168.10.1. The Subnet Mask is 255.255.255.0. This is the most common. Don't worry about it. It is what it is. It would bore you and everyone else who reads this to tears if I tried to explain it.

                    I have enabled DHCP server functionality on the router. I only want it to hand out 10 IP addresses starting at 192.168.10.10 and ending at 192.168.10.19. This means I can statically assign IP addresses from 192.168.10.2 (because .1 is used by the router) to 192.168.10.9 AND 192.168.10.20 through 192.168.10.254.

                    The Client Lease Time is 24 hours which means that even if the device is powered off, if it requests an IP address within 24 hours of previously being assigned one, it will get the same IP address. If the lease expires while the device is powered on, the lease is automatically renewed and it retains the same address.

                    The Static DNS is set to 0.0.0.0 which means it will just give out the DNS IP address that the router got from the cable modem. (Don't worry about this either.)

                    In order to assign addresses on your network, we need to determine the following:
                    --what range your network is in
                    --what the gateway address is (it will be your router address)
                    --the subnet mask
                    --what the address of the DNS server(s) is

                    To help find this information, open a command prompt (DOS Window) and type

                    ipconfig /all

                    and press Enter.

                    The output should look something like this.

                    C:\>ipconfig /all

                    Windows IP Configuration

                    Host Name . . . . . . . . . . . . : PARENTS
                    Primary Dns Suffix . . . . . . . :
                    Node Type . . . . . . . . . . . . : Unknown
                    IP Routing Enabled. . . . . . . . : No
                    WINS Proxy Enabled. . . . . . . . : No

                    Ethernet adapter Local Area Connection:

                    Connection-specific DNS Suffix . :
                    Description . . . . . . . . . . . : Broadcom NetXtreme 57xx Gigabit Controller
                    Physical Address. . . . . . . . . : 00-12-3F-49-36-3A
                    Dhcp Enabled. . . . . . . . . . . : Yes
                    Autoconfiguration Enabled . . . . : Yes
                    IP Address. . . . . . . . . . . . : 192.168.10.13
                    Subnet Mask . . . . . . . . . . . : 255.255.255.0
                    Default Gateway . . . . . . . . . : 192.168.10.1
                    DHCP Server . . . . . . . . . . . : 192.168.10.1
                    DNS Servers . . . . . . . . . . . : 192.168.1.254
                    Lease Obtained. . . . . . . . . . : Monday, October 10, 2011 7:08:28 PM
                    Lease Expires . . . . . . . . . . : Tuesday, October 11, 2011 7:08:28 PM
                    As you can see, my network range is 192.168.10. All the addresses on this segment of the network must start with 192.168.10.

                    The gateway address is 192.168.10.1.
                    The subnet mask is 255.255.255.0.
                    The DNS Server address is 192.168.1.254. That is the IP address of my cable modem and this is a pretty common setup as well.

                    To statically assign IP addresses for your devices will need to enter the IP address, subnet mask, gateway, and DNS server. The gateway, subnet mask, and DNS server will be the same for all devices. The last part of the IP address must be different but the first three octets (in my case 192.168.10) must be the same. I don't have that many devices on my network that need a static IP so I only use .1 for the router and .2 through .6 for the other devices. You can really use any one you want as long as it isn't duplicated on your network and is outside the DHCP pool.

                    Hope this makes some sense.

                    If it doesn't, just post the results of the ipconfig /all command and maybe a screen shot of your router DHCP config and we can take it from there.

                    Dave
                    Last edited by DDave; 10-10-2011, 09:53 PM.
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                    • #11
                      Wow Dave thanks ill see what I can do

                      Sent from a cell phone that is way cooler than yours!! Eat It!! $

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                      • #12
                        Porn
                        sigpic

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                        • #13
                          Originally posted by Fishawn View Post
                          Porn
                          Oh god this wont block me porn. I hope Dave

                          Sent from a cell phone that is way cooler than yours!! Eat It!! $

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                          • #14
                            Originally posted by Pandemonium View Post
                            Oh god this wont block me porn. I hope Dave

                            Sent from a cell phone that is way cooler than yours!! Eat It!! $
                            Try www.oldfolkswearingnixonmasks.com if you get bored...... Or not...

                            Sent from the man cave while wearing a Nixon mask......
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                            • #15
                              Originally posted by Pandemonium View Post
                              Oh god this wont block me porn. I hope Dave
                              Only if you use the FamilyShield DNS servers IP addresses.

                              I don't know if you have kids or not but if you put these DNS server IPs on their devices, it does a certain amount of filtering.

                              208.67.222.123
                              208.67.220.123

                              Helpful for devices like Nintendo DS and the like that have a web browser and can't run software like NetNanny.

                              Dave
                              CUHS Metal Shop Reverse Flow
                              UDS 1.0
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                              Proud Smoked-Meat Member #88
                              -
                              "All welcome, take what ya need, share what ya know. " -- Richtee, 12/2/2010

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