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NTP issues when Orbi (RBR50) is in Router mode
I have AT&T Uverse with a AT&T Pace 5268AC gateway. My RBR50 is setup in router mode. It is in the DMZ of the gateway (DMZPlus mode so all traffic is directed to it) and has a public IP address. Es...
An update for anyone who may run into this. After posting here, I remembered that I had a AT&T Arris NVG599 in my parts bin. I took it out, reset it, and configured it in "Passthrough" mode for my RBR50. Guess what - NTP has been working since, and I have kept my RBR50 in router mode.
So, FURRYe38 , you were correct about it being an ISP/gateway issue. The AT&T Pace 5268AC gateway was the problem.
Thats not "bridge mode", just the use of DMZ as a WAN traffic pass through thats supposedly unfiltered. ATT Modems don't don't support actual bridge mode.
FURRYe38 wrote:Thats not "bridge mode", just the use of DMZ as a WAN traffic pass through thats supposedly unfiltered. ATT Modems don't don't support actual bridge mode.
This time, I did watch the video all the way to the end. Yes, indeed. He has confused "bridge mode" with DMZ.
What I wonder, however, is why this person appears to think that any router will function in this setup.
Surely he would have noticed if NTP totally failed on his router or any device connected to his router? If no device can get NTP to work, then this is totally unusable.
NTP is the subject of this thread, not "bridge mode vs. DMZ". Did he do something (like when he disabled checking for "router behind router" that makes NTP work?
I think NTP problems are not easily noticed because most devices generally do not have a significant time drift, and when there is one, most people just manually correct the time on the device. I just happned to notice this because I was doing some automation which wipes and reloads the OS and does other things including authenticating to cloud services. It was because I could not get a valid authetication token for the cloud services that I started to dig into it and found the NTP issue. I thought of just manually correct the time like most people will do but then the curious part of me started to ask why time sync wasn't working. Then I looked at a number of other computers & devices and noticed that they hadn't synced time in months - and last synced around when I switched my RBR from AP to router mode.
So it looks like the only way for me to get this working is to go change back to AP mode huh? This stinks. Good fiber speeds from AT&T but you pay for that with inflexibility in their gateways.
Kandyman wrote:So it looks like the only way for me to get this working is to go change back to AP mode huh? This stinks. Good fiber speeds from AT&T but you pay for that with inflexibility in their gateways.
I don't have AT&T and cannot experiment with the exact steps recommended in that video, so I have no way to verify his claim. I would think that all of my devices would complain if they could not get a time sync when they boot up.
I am still confused about why the Orbi needs to be in AP mode when in the DMZ. That seems contrary to the advice I have seen for years about the three ways to solve the "Double NAT" issue: (1) ISP in bridge mode, (2) Orbi in AP mode, (3) Orbi in DMZ (in router mode).
CrimpOn wrote:
Kandyman wrote:So it looks like the only way for me to get this working is to go change back to AP mode huh? This stinks. Good fiber speeds from AT&T but you pay for that with inflexibility in their gateways.
I don't have AT&T and cannot experiment with the exact steps recommended in that video, so I have no way to verify his claim. I would think that all of my devices would complain if they could not get a time sync when they boot up.
I am still confused about why the Orbi needs to be in AP mode when in the DMZ. That seems contrary to the advice I have seen for years about the three ways to solve the "Double NAT" issue: (1) ISP in bridge mode, (2) Orbi in AP mode, (3) Orbi in DMZ (in router mode).
Orbi will not be in the DMZ when I put it AP mode. That would be bad. I will take it out of the DMZ and have it just be be an AP for wireless clients, behind the gateway. NTP works fine in that configuration where the only NAT is the gateway.
It's still not actual bridge mode. The NAT or router is still running on the modem. I watched the video as well.
Possible that the metion of the "router behind router" has something to do, though the video didn't point to checking NTP after they were done making changes on the modem.
Been other posts regarding the the PACE branded modem is out of date and should be replaced or updated and changed out. With the metion of the "router behind router" not working well by the video, seems like this ellates to other problems with this brand of modem .
Otherwise, the modem is interferring with the data for NTP on this thread and Orbi is having problems with it. Something that needs to be resolved on the modem side and only one having this problem currently.