Router keeps changing IP

[Matt McCreadie]

I have 2 older Tyan servers running at my house, one running as a file server and one running as a game server. My internet router is upstairs and my servers are downstairs so i ran a ethernet cable down to them and I am using another router as a network switch. all works fine but every once and a while the second router changed its ip address, thus not allowing the ports to come through the first router, also not allowing me to remote into the servers to fix the problem? anyone know of a solution?

Thank you,

Matt M

[Donut417]

1 minute ago, Matt McCreadie said:

I have 2 older Tyan servers running at my house, one running as a file server and one running as a game server. My internet router is upstairs and my servers are downstairs so i ran a ethernet cable down to them and I am using another router as a network switch. all works fine but every once and a while the second router changed its ip address, thus not allowing the ports to come through the first router, also not allowing me to remote into the servers to fix the problem? anyone know of a solution?

Thank you,

Matt M

Your IP thru you ISP is dynamic meaning it changes. ISP charge for static IP's, plus some dont allow them on residential connections. As most ISP's dont want internet facing servers on residential internet. So beside using a service like no-ip there is not much you can do. 

[Matt McCreadie]

7 minutes ago, Donut417 said:

Your IP thru you ISP is dynamic meaning it changes. ISP charge for static IP's, plus some dont allow them on residential connections. As most ISP's dont want internet facing servers on residential internet. So beside using a service like no-ip there is not much you can do. 

No, I have a static IP through my ISP, has never changed. The problem is with my router, I have my modem going to a Netgear router to use as the wireless router for the house, then I have a LAN cable running to another Linksys router with the wireless turned off, just to use as a network switch. every once and a while, the internal IP of the Linksys router will change and screws up all of the ports I have forwarded on the Netgear router. Is there any way I can make the IP of the Linksys router static?

[Donut417]

1 minute ago, Matt McCreadie said:

No, I have a static IP through my ISP, has never changed. The problem is with my router, I have my modem going to a Netgear router to use as the wireless router for the house, then I have a LAN cable running to another Linksys router with the wireless turned off, just to use as a network switch. every once and a while, the internal IP of the Linksys router will change and screws up all of the ports I have forwarded on the Netgear router. Is there any way I can make the IP of the Linksys router static?

Did you turn your DHCP server off in your secondary router? Because if your have two DHCP servers on then this can happen. 

[Matt McCreadie]

1 minute ago, Donut417 said:

Did you turn your DHCP server off in your secondary router? Because if your have two DHCP servers on then this can happen. 

No, I don't know what that is but ill go look for it in the router settings, Thank you very much!

[r4tch3t]

You'll want to leave the dhcp server on and change the same so that you have a bunch of ips you can use as static ips. Then go into the lan adaptor settings and change the ipv4 settings to use a specific IP rather than obtaining automatically.

[jj9987]

You are running two routers, both in router mode, resulting in dual NAT and two separate networks. Set your second router to not do NAT and/or separate subnet, keep it all in one network. Then you can set static internal IPs to your servers, either in the router DHCP settings or on the server itself.

[chiller15]

You need to disable the DHCP and probably also the wireless on the second router (the one that isn't directly connected to the Internet).

[NelizMastr]

4 hours ago, r4tch3t said:

You'll want to leave the dhcp server on and change the same so that you have a bunch of ips you can use as static ips. 

That's not how it works  your home network has a certain range, i.e. 192.168.1.0/24 this means you have 254 addresses to choose from. You can pick any address in this range and it'll have network connectivity with other devices, DHCP isn't needed for this. All DHCP does is provide addresses to devices requesting one in a given range so you don't have to set one yourself. It's a convenience system, not a necessity.  In fact, assigning a static IP in a DHCP range can cause IP address conflicts as the DHCP server can't tell whether an IP is taken if it's not assigned by DHCP.

 

25 minutes ago, jj9987 said:

You are running two routers, both in router mode, resulting in dual NAT and two separate networks. 

This. 

 

Connect the two routers LAN to LAN and disable DHCP. This will basically turn the 2nd router into an access point and switch rather than a router and keep both routers in the same subnet. That's basically all you need to do.

 

[r4tch3t]

48 minutes ago, NelizMastr said:

That's not how it works  your home network has a certain range, i.e. 192.168.1.0/24 this means you have 254 addresses to choose from. You can pick any address in this range and it'll have network connectivity with other devices, DHCP isn't needed for this. All DHCP does is provide addresses to devices requesting one in a given range so you don't have to set one yourself. It's a convenience system, not a necessity.  In fact, assigning a static IP in a DHCP range can cause IP address conflicts as the DHCP server can't tell whether an IP is taken if it's not assigned by DHCP.

 

Sorry the same In my previous post was ment to be range in reference to freeing up some ips from the dhcp servers range to prevent said conflicts.

You provided a much better explication though.