I see, I know that in Windows Vista/7, Microsoft implemented the dynamic TCP packet size, and dynamic window size iirc. These new technique at times can make a stateful firewall go berserk. But to completely "self destruct"? I've searched in google - maybe my search term isn't quite right... And as for DIR-300, I got one - it's running somewhat OK, despite I need to drop my network speed to 100BaseT, and yesterday, I tested it as a gateway - it works normally...
zzz2496
DIR-300 LAN ports are 10/100. Did you mean you dropped to 10Mbs? There are several wireless routers that don't play nice with certain wireless adapters under Windows 7 when using ancillary features like Wi-Fi Protected Setup, EAP and UPnP. For example the el cheapo Rosewill RNX-EasyN400 ($25 Newegg) does not work with the Atheros wireless-n adapter in my EeePC 1000HE. Something breaks down between the authN methods sent in the AP beacon and the interpretation on the Atheros driver / Windows 7 side. Search for those kind of incompatibilities and you'll likely find routers that no longer open ports via UPnP, can't PBC setup, etc.
No, my internal network runs at Gigabit speed, so I need to drop the speed manually in my network interface to 100BaseT, even my Mikrotik router's interface is running at Gigabit speed...
Note: DIR-300 doesn't play nice with my NIC, so I have to manually set 100BaseT...
As for the UPnP implementation, I personally NEVER use UPnP - maybe because I'm convensional. I prefer to open ports manually, I don't want a rogue program running havoc in my network all because I set UPnP... One little switch and the whole network goes down... Scary thought
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As for Wifi authentication, it's a problem on the AP side of the router. See el cheapo routers have several devices integrated to them. On a wired only router usually they have a 2 interface router (1st device) and a switch (2nd device). On a Wifi broadband router, there are 3 devices - a switch, an Access Point, and a 2 interface router. On a Wifi DSL broadband router, you got 4, add DSL modem which attached to the WAN side to the list. For a Wifi Cable broadband router, change the DSL modem module with a DOCSIS modem module. If you failed to connect wirelessly to a broadband modem, doesn't mean that the device is broken (as in dead), it's just the AP side doesn't play nice with your Wifi NIC. In this case, you might want to look for a compatible Wifi adapter that plays nice with the AP side of the router. The router is not compatible as a whole, just the AP part...
zzz2496