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Posted

For those not familiar with Smartzone, they are an internet service provider to apartment buildings, condos, etc. They sell cards with usernames and passwords, good for various lengths of time and access speeds. Note that you can buy 2Mbit access for 30 days for 700 baht, or 1Mbit for 30 days for 500 baht. So they are charging for BANDWIDTH.

I have small home network, consisting of a network storage server, a WDTV live, a printer, etc, which are variously connected to either a hard wire Ethernet connection, or WiFi, through my own router/wireless access point.

Now the tricky part: sincce I have to log in to Smartzone's web portal to enter my username/password to access their service, I use a small netbook as a gateway, and Windows Internet Connection Sharing (ICS) to feed the WAN side of my router from the netbook's Ethernet port, allowing anything logged into it the router see the web.

This has worked flawlessly for many months, then suddenly, no other machine (wife's laptop, Android phones, etc.) could see the internet, although my main desktop (which is connected by hardwire Ethernet) continues to have access. I have tested it by plugging her laptop into an Ethernet port on the router, but still no access. My router supplies DNS passed through from the gateway as one of the selections, and Google's DNS as the alternate.

In the past, when it stopped working, I called them and got the ONE guy who seems to be smart enough to check a few things, and he did something to their SQUID server, and everything went back to working as usual.

My question is: why/how would they know what is on the other (ICS) side of my netbook gateway? And how could they block access by ANYTHING on that side of the ICS NAT?

I know there are savvy network guys here on TV. I hope one or more of you may have some ideas.

Thanks in advance.

Posted

New info: all the affected machines are NOT running Windows: 2 Android, 1 Ubuntu. My old HP laptop with Win XP seems to work just fine. So, it appears OS-specific.

Tried to call them this morning, but they said they would have to call me back...

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