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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 t...
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, ...
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.
I followed the steps in the link above to set the modem into passthrough mode (dynamic), added the nighthawk back in, and disabled QoS.
I am still unable ssh into my raspberry pi from my hardwired desktop nor my macbook through wireless. I confirmed the ip address on the raspberry pi. In addition, I cannot connect to my scanner same as before.
I'm unsure where else to check.
In addition, with this configuration I am getting much slower upload speeds. (70mbps compared to 600mbps+)
camjones1708 wrote:If everything was connected to the 'inner' NAT, why would there be issues with SSH/Bounjour/etc.?
For general Internet surfing or most home office VPN double NAT isn't an issue. For gaming, ideally the console(s) ideally must have UPnP PMP control on the public IP address and the port forwarding. controlling two NAT routers in a line does make it very difficult, as the consoles and games use sophisticated NAT mapping and alternate ports - and the config would require manual duplication to the outer NAT router pot forwarding.
Be aware the QoS part can only work reliably if the router is under control of all traffic. Just the "inner" router can't do much (or anything) in this context.These to items are the show-stoppers for double-NAT and more.