Stop private private ip change

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gumdigger

411 posts

Ultimate Geek
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Topic # 31550 21-Mar-2009 21:03

Hi

I have 3 clients in the house, everyday i see the private ip is changed. this is a pain for me as i do vnc and i have done port forwarding for few applications and for that i have to map the ip with port no.
so how can i stop the ip changing. my router is RTA1025.

thanks

lxsw20

2190 posts

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Reply # 202538 21-Mar-2009 21:14

Any reason you cant just put static ip's on the clients?

grant_k

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Reply # 202539 21-Mar-2009 21:17

You need to change the IP addresses of each device on your LAN to STATIC I/P, not DHCP (dynamic). It is very easy to do this under Windows, but first make sure you know the address of your router, because you will need to enter this as the DEFAULT GATEWAY address. You will also need to enter the Subnet Mask which is most likely 255.255.255.0.

gumdigger

411 posts

Ultimate Geek
+1 received by user: 2

Reply # 202543 21-Mar-2009 22:02

hi
tried that. my routers address is 192.168.1.1. so i manually confg each machine and used routers add as default gw. my internet didnt work. though i had lan access.

lxsw20

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Reply # 202544 21-Mar-2009 22:05

Did you also have your router set as your dns server? If that didnt work try your ISP's DNS. Router usually works though.

gumdigger

411 posts

Ultimate Geek
+1 received by user: 2

Reply # 202547 21-Mar-2009 22:19

lxsw20: Did you also have your router set as your dns server? If that didnt work try your ISP's DNS. Router usually works though.

oops i missed that. how often do isp dns change though?.

lxsw20

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Reply # 202548 21-Mar-2009 22:24

extreamly rarely.

grant_k

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Reply # 202549 21-Mar-2009 22:27

gumdigger: oops i missed that. how often do isp dns change though?.

Pretty rarely, but it can happen. This is the benefit of pointing Static IPs at the router for their DNS requests. Whenever your router authenticates with your ISP (e.g. after Power On or Reset), your ISP's server will send the current DNS addresses to your router. If your Static IP clients make their DNS requests to the router, it will pass on the requests to the correct IP address as provided by your ISP at that time. Then you don't have to worry about those DNS addresses ever again.

gumdigger

411 posts

Ultimate Geek
+1 received by user: 2

Reply # 202551 21-Mar-2009 22:30

grant_k:
gumdigger: oops i missed that. how often do isp dns change though?.

Pretty rarely, but it can happen. This is the benefit of pointing Static IPs at the router for their DNS requests. Whenever your router authenticates with your ISP (e.g. after Power On or Reset), your ISP's server will send the current DNS addresses to your router. If your Static IP clients make their DNS requests to the router, it will pass on the requests to the correct IP address as provided by your ISP at that time. Then you don't have to worry about those DNS addresses ever again.

Cheers