One device won’t connect to NAS

[rico567]

Have been connecting to my Synology NAS with several devices & no issues since I bought it. Tried another (different) device today through same browser, couldn’t even get login screen. says “server unavailable.” Other browser doesn’t work, either. Ideas?

 

[EAZ1964]

Windows device?

 

[rico567]

No- original devices were Mac laptop & iPad, one that won’t connect is MacBook Pro.

 

[fredbert]

What is the form of the URL (or URLs) that you use to connect?

Is it http or https? If https, does your SSL certificate cover the server name you are using? Is the certificate self-signed?

 

[EAZ1964]

Via wifi? Are you in the same ip range? Can you ping the nas?
afp Or smb? can you see the nas in the smb network in finder ?

 

[rico567]

Via wifi? Are you in the same ip range? Can you ping the nas?
afp Or smb? can you see the nas in the smb network in finder ?

Yes, all devices via wi-fi (NAS is wired directly to router). All devices in router subnet. Yes, I can ping both LANs on the NAS (it is a DS718+, and both Ethernet ports are connected to ports on the router). I can see NAS on SMB network in Finder, but it will not connect.
Thanks for your input.

 

[EAZ1964]

Sorry you really should give much more info, i cannot keep asking questions..
mac os version? router, firewall, etc etc

 

[rico567]

Thanks, you solved the problem with your last response, although I still do not understand why one laptop would connect and another wouldn’t, and one iOS device would and the other wouldn’t. Your response about IP ranges made me think about examining the physical Ethernet connections in the LAN. It turns out that I had connected both Ethernet cables from the NAS to two ports in a Gigabit switch, with that connected to a router port. This was corrected by connecting directly to the router, now all devices can connect to the NAS.
Thanks again for your time.
No firewalls were ever present
Router is Portal-1.4.240_prod-1.2.226
Mac OS 12.0.1
iOS 15.0.2

 

[EAZ1964]

That is great, thanks for the update!