I am computer scientist myself but not specialized in network administration so I have some educated investigation to the weird problem I am having. Please accept my apologies for the long post and possibly bad English.
Setup: Rogers Ignite 250u using CGN3 modem. Web service hosted by NAS setup behind the modem. Domain hosted by external dynamic DNS services. Correct port forwarding is configured in modem.
1. From external, desktops, laptops and Windows tablets CANNOT access the website, either on wired network or on corporate WiFi. (Never tested iPad)
2. However, laptops and Windows tablets CAN access the website if they are tethering through a mobile network.
3. From external, cellphones can always access the website, no matter it is on mobile network or on corporate WiFi. (Both Android phones and iPhones work)
4. Within the local area network, all devices can access the website.
I tried using tracert to find out if it is a routing issue but I think one of the Rogers had blocked tracert/ping packets.
Does anyone have any hint on solving the issue?
Thanks in advnace,
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