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Nighthawk R7960P Preventing intranet services (SSH, Bounjour, dropping packets)
My setup is the Nighthawk R7960P sitting behind the AT&T provided all-in-one modem with the wi-fi turned off. The nighthawk is connected with its WAN to the LAN of the AT&T router. My reasoning for this is for QOS enabled on the nighthawk so I can game while others stream in the house.
The issue I am experiencing is that services that bind to specific ports are being blocked internally in the network. I have confirmed IP addresses multiple times. SSH was one that would not work from any machine to my raspberry pi. The other service is bonjour for our canon printer. Neither my macbook nor my windows desktop could connect to the printer. Additionally, I was receving a lot of packet loss while playing call of duty.
I have tried:
- Rebooting all devices
- Reverting firmware on the nighthawk.
- Looking for blocked ports/services ( none found)
I got around this by taking out the nighthawk router and enabling wi-fi on the AT&T device. This resolved both issues.
Is there a setting on the nighthawk that I am missing causing these issues?
The effect you are fighting ref. your RasPi and the random access does very well indicate there are multiple devices with the same IP address ou your network (LAN and WLAN).
Leaving the names alone (no clue what Netgear is riding since they have added this attached device detection): Are the systems on the network with fixed IP addresses? If all devices are DHCP, has everything be cold booted, starting with the router? Check the view with each device coming back to the network, review each device config, ...
30 Replies
Disabling wifi doesn't disable the routing function of the att device.
It leaves you in a double nat with 2 routers in router mode on the network.
https://kb.netgear.com/30186/What-is-Double-NAT
options? (only use 1)
1. put the att combo device in passthrough modem only mode. Again, disabling the wifi doesn't do this
2. put the netgears IP address into the att devices dmz.
3. put the netgear in access point mode.
What speeds do you pay for with att?
If its >250mbps, qos isn't recommended as it can actually hurt speeds versus help them.
Thanks for the quick reply.
BGW320-500 is the AT&T listed modem. I found an article on placing that into passhtrough mode. https://www.att.com/support/smallbusiness/article/smb-internet/KM1188700
I've got gigabit speeds. I enabled QOS because I was getting latency issues (150ms+) while playing games when someone was streaming netflix or similar. Do you believe this would be caused by the double NAT?
If everything was connected to the 'inner' NAT, why would there be issues with SSH/Bounjour/etc.?Nat issues can cause multiple issues.
And the funny part is some routers will work fine on double nat's and others will cause nothing but issues. Its why we recommend getting that issue fixed first and then try the network out.
