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[Invader21]

I have the DIR-655, Rev. B running 2.07NA firmware, and have a strange problem with my wired clients.  I have my primary computer/desktop PC connected via wired connection.  I also have several wireless clients (laptop, iPad, iPhones, etc.).  All have been performing normally.  However, in December I connected a wired weather internet bridge to another ethernet port on the DIR-655.

It functions as it is supposed to, and all other connected devices do as well. But here's the problem - whenever I use the desktop PC (the only other wired connection) to do anything on the internet (mostly just web browsing ... I don't stream media from the internet on it, I don't do torrents....nothing out of the ordinary, and nothing really of high bandwidth), the wired weather bridge cannot communicate with its associated website.  This continues as long as I'm using the desktop PC.  When I stop using the desktop, the weather bridge resumes normally.

I have researched the weather bridge, and it is simply doing POST transactions (or so I'm told) to the website listening to it.  It doesn't wait for acknowledgements or anything...just keeps POSTing updates. 

I tried reserving an IP for the weather bridge and the desktop, enabling QoS, and prioritizing the weather bridge (100 vs. desktop at 125), but it didn't help.  I've tried moving the weather bridge into the DMZ.  Again, it doesn't help. 

I'm totally baffled how just using the desktop to browse the internet could completely block the traffic from the weather bridge.

Any thoughts or suggestions would be appreciated.  On the weather bridge support site, they suggested that I insure I'm not connected in gigabit speeds from my computer to the router, because in the past that has been known to cause issues on clients not running that speed, but I don't think my desktop is connected in that fashion.  According to the settings, it can do 10 or 100, full or half.  I have it set to AUTO.

[FurryNutz]

Link>Welcome!
What region are you located?
Has a Factory Reset been performed?

What ISP Service do you have? Cable or DSL?
What ISP Modem make and model do you have?
ICheck ISP MTU requirements, Cable is usually 1500, DSL is around 1492 down to 1472. Call the ISP and ask.

Some things to try: - Log into the routers web page at 192.168.0.1. Use IE, Opera or FF to manage the router.
Turn off ALL QoS or Disable Traffic Shaping (DIR only) GameFuel (DGL only and if ON.) options. Advanced/QoS or Gamefuel.
Turn off Advanced DNS Services if you have this option under Setup/Internet/Manual.
Turn on DNS Relay under Setup/Networking.
Setup DHCP reserved IP addresses for all devices ON the router. Setup/Networking. This ensures each devices gets its own IP address when turned on and connected, eliminates IP address conflicts and helps in troubleshooting.
Ensure devices are set to auto obtain an IP address.
If IPv6 is an option on the router, select Local Connection Only or Disable IPv6 options under Setup/IPv6.
Set Firewall settings to Endpoint Independent for TCP and UDP under Advanced/Firewall.
Enable uPnP and Multi-cast Streaming under Advanced/Networking. Disable uPnP for testing Port Forwarding rules.
WAN Port Speed set to Auto or specific speed? Some newer ISP modems support 1000Mb so manually setting to Gb speeds can be supported by the router. Advanced/Advanced Networking/WAN Port Speed
Set current Time Zone, Date and Time. Use an NTP server feature. Tools/Time.
 
Turn off all anti virus and firewall programs on PC while testing. 3rd party firewalls are not generally needed when using routers as they are effective on blocking malicious inbound traffic.
Turn off all devices accept for one wired PC while testing.

Check cable between Modem and Router, swap out to be sure. Link> Cat6 is recommended.

[Invader21]

I am located in the US (Eastern Time Zone).

I have not recently done a factory reset.  I will backup the config, do the reset, and then reload the config?

ISP Service is Insight Broadband (Cable); Cable modem is the Arris Touchstone Telephony Modem.

I will try the settings you recommend as soon as I am able, and report back. 

[FurryNutz]

I am located in the US (Eastern Time Zone).

I have not recently done a factory reset.  I will backup the config, do the reset, and then reload the config? Please test with out reloading the config file initially, then try after to reload.

ISP Service is Insight Broadband (Cable); Cable modem is the Arris Touchstone Telephony Modem. What model number is this modem?

I will try the settings you recommend as soon as I am able, and report back. 
Keep us posted.