camera DVRs keep getting disconnected from network, could ports be an issue?

[tracerit]

I have three camera DVRs set up to be accessed via internet. DVRs A and B are connected to Router 1, DVR C is connected to Router 2. Both Routers are then connected to a gateway/modem from our ISP. Connections are via ethernet.

I want to set everything up so DVRs ABC are all connected to Router 1 but with that set up it kept getting disconnected every once in a while, I split it up to see if the routers are at fault.

I set everything up this morning and have been able to access them until 30 minutes ago when they ALL 3 DVRs went down. The werid thing is that I was able to connect to Routers 1 and 2 via wifi and it get on the internet. I went to the room, and the DVRs were fine, I rebooted Router 2 and voila, all the DVRs are connectable to the net again.

I'm beginning to wonder if the ports I chose are the issue? I have three ports forwarded on my gateway and router in the 40000-40003 range. Is there a "safe" range of ports to use?" The disconnection issues are random and I haven't been able to find out what's causing it. I roginally thought it would be the repeater I was using, so I hardwired everything. It's not power loss, the uptimes on all devices are correct.

stumped here :/

 

[Aarondeep]

Maybe you are double NATing ? Is your DSL gateway giving out external IPs or internal ones like 192.168.x or 10.x?

 

[tracerit]

the gateway gives out IPs to the routers as 10.1.10.10 and 10.1.10.11

I should note that the DVRs would be inaccessible via internet even when I had only one router connected. I"m just curious what's happening with the network that when all are inaccessible, just rebooting only Router 1 would get even the DVR thats connected to router 2 back on.

 

[Aarondeep]

I would avoid using the routers all together and plug the DVRs into the gateway, if there aren't any more ports use a switch instead of routers.