I have an Asus wireless router RT-AC68U to which I have attached a cable modem, my iMac and a couple of Cat5 or 6 cables running off to switches to which are attached a few media boxes, TVs and NAS boxes. My ISP recently had a major fault that cut of internet access to my house either wholly or to a level which couldn't be detected. Despite the router and other LAN sniffer apps detecting every networked device attached, I could not connect to them. For example I had a Drobo NAS and a Western Digital NAS connected directly to the router and while they appeared in my Finder as attached drives clicking on them to connect give an error dialog indicating they were not available. As soon as the ISP restored internet access everything worked as normal. I don't understand why lack of internet access from the cable modem affected the connectivity with the networked devices. Can anyone explain this to me? I just want to be prepared for the next time it happens if I can change a setting on the router which will still let me connect to my NAS even if the net is unavailable. One thing to note is that whatever the flaw was wit the iSP, the modem still indicated an active internet line. I have a feeling I have lost the internet before and not had this problem but in those cases the loss of internet was reflected in the modem showing no signal at all.i think... Any advice gratefully received.
Internet outage prevents connection to networked devices
- Thread starter reid007
- Start date
The lan ports on a router are just a switch. The traffic goes directly between them and should not even involve the main processor on the router. This is why you can not even put firewall rules in most routers for lan-lan or wireless to lan.
It "should" work perfectly fine since your traffic should only be using mac addresses to talk between the devices. I would have to suspect it is some strangeness with the software on the NAS or maybe the application. It might use DNS or something.
Generally these partial internet failures cause more problems than total outages. If for example you could get to things like DNS servers on the ISP network but the cut was between the ISP and the actual internet. Or if you could get to some external ISP but not all.
Still I can't see how it can make a difference NAS boxes are used all the time in firewall protected networks that have no access to the internet.
It "should" work perfectly fine since your traffic should only be using mac addresses to talk between the devices. I would have to suspect it is some strangeness with the software on the NAS or maybe the application. It might use DNS or something.
Generally these partial internet failures cause more problems than total outages. If for example you could get to things like DNS servers on the ISP network but the cut was between the ISP and the actual internet. Or if you could get to some external ISP but not all.
Still I can't see how it can make a difference NAS boxes are used all the time in firewall protected networks that have no access to the internet.
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