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[mackconsult]

Recently I have noticed my internet get slow.  I use a comcast cable internet connection that is directly connected to my dlink DR 655.  I use the megapath internet speed test (http://www.megapath.com/speedtestplus/) when testing my internet speed.  Have a laptop that is usually on wireless and an XP workstation that is connected to the 655 directly with static IP.

I would be browsing the internet and all the sudden the internet would get really slow.  This would happen on both my desktop and the laptop and my speed test on both machines would be around .3 Mbps.  When this happens I would go and connect the laptop with the ethernet pot directly to the modem.  Of course a reboot of the modem has to occur before a connection can be made so once I do that all the sudden my internet is back up to par (12 Mbps).  I go ahead and put my network back to the way it was and it all goes back up to 12 Mbps.  I have called comcast several times and they are telling me it my router.

This picture shows a snapshot of some windows from the laptop.  The CMD ipconfig on the bottom left shows the laptop network settings when connected directly to the modem.  The CMD ipconfig on the upper left is the network settings when connected to the router.  The web page on the right shows the WAN network settings when the 655 is connected to the cable modem.

Notice the DNS servers, they are different when the 655 is connected to the modem versus when the laptop is connected to the modem.  Could this be part of my problem?  I have not seen were I can manually change 655 DNS entries ... is there a way to do this?  Or should I not even be worried about it?

[FurryNutz]

What Hardware version is your router? Look at sticker under router.
Link>What Firmware version is currently loaded? Found on routers web page under status.
What region are you located?
Are you wired or wireless connected to the router?

What are you ISP Speeds UP and DOWN that you pay for?
What ISP Modem do you have? Stand Alone or built in router?
What ISP Modem make and model do you have?
If this modem has a built in router, it's best to bridge the modem. Having 2 routers on the same line can cause connection problems.
Double NAT
To tell if the modem is bridged or not, look at the routers web page, Status/Device Info/Wan Section, if there is a 192.168.0.# address in the WAN IP address field, then the modem is not bridged.
If the modem can't be bridged then see if the modem has a DMZ option and input the IP address the router gets from the modem and put that into the modems DMZ.

Some things to try: - Log into the routers web page at 192.168.0.1.
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.
Please review this: http://forums.dlink.com/index.php?topic=50791.0
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.
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

Link>Wireless Installation Considerations
What wireless modes are you using? Under Setup/Wireless/Manual.
Try single mode G or N or mixed G and N?
Channel Width set for Auto 20/40Mhz or try 20Mhz only.
Try setting a manual channel to a open or unused channel. 1, 6 or 11. 11 for single mode N if the channel is clear.
What security mode are you using? Preferred security is WPA-Personal. WPA2/AES Only. Some WiFi adapters don't support AES, so you might want to try TPIK only or Auto.
What wireless devices do you have connected?
Any cordless house phones?
Any other WiFi routers in the area? Link> Use InSSIDer to find out. How many?
Turn off WISH, and WPS under Advanced.
Try turning off Short GI, WLAN Partition,and Extra Wireless Protection if you have it. Under Advanced/Advanced Wireless.
Enable WMM Enable Under Advanced/Advanced Wireless.
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.

[davevt31]

ISPs have pools of DHCP addresses and multiple DNS servers to allow for load balancing and fallback in case one server fials.  The IP is issued to the MAC address of the item requesting the address.  Thats why you will see different IPs and DNS servers listed.

[FurryNutz]

Any status on this?