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[kiraz]

Having some issues. 
Having problems loading websites. Not any in particular. I'll just load a bunch of random ones and they will either load fine, load very slowly, or not load at all and give me the server not found error. Sometimes they will only partially load or load improperly. Has been happening since thursday. This morning I had no problems. My service provider, Mediacom, were having DNS issues on thursday. I talked to them and they said that issues was fully resolved. So I don't know if the problem is at my router right now or with them. :/ Help!

[FurryNutz]

What ISP Modem make and model do you have?

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.

Does this happen on every devices or a certain device?

[kiraz]

All QOS has been off.
Advanced DNS service. Off
DNS Relay is on
DHCP is reserved for all devices and auto obtain
IPv6 Is local connection only
Firewall is endpoint independant for TCP and UDP
I'm going to be home within an hour. There is one person on wifi on a laptop. I'll ask them when I get home if theyve had any problems.

[kiraz]

ok they haven't used the net for a few days....
SO. What sucks is this problem started on thursday afternoon. When they installed a new modem and connected my router. Around the same time they had DNS issues. Such bad timing.. because of that I have no idea if it's an issue with my router or with them. 
I asked them if I should try to flush my DNS and they said no. Would it help?
Modem is a Thomson DCM476

This one:
http://www.technicolor.com/en/hi/digital-home/mediaaccess/cable/u-s/dcm476

[kiraz]

Also the tech set up the router
Under internet connection type it's set at Dynamic IP (DHCP)
Does it even matter if I use Dynamic or Static?

[Hard Harry]

Ooh, never let a ISP tech touch your router. Probably want to go through the set up again. Many still use WEP security..or worst yet, no security at all.

Modem is good. Stand alone, 8x4 DOCSIS 3. As for clearing your DNS Cache, certianly.

But first reboot your modem, then go into your router Internet > Setup > Manual Internet Connection Setup > Uncheck Advanced DNS, make sure Internet Connection is set to DHCP.

Then Wireless Settings >  Manual Wireless Network Setup > Mode should be Mixed N and G(1). Enable Auto Scan, Rate to Best,and Channel Width to Auto 20/40. Security should be set to WPA Personal, WPA Mode WPA2 Only (2) Cipher AES. Type in a 8-26 simple text password, just like a email password. Keep that password someplace save, written down. Save settings and reboot.

Last, Start > Run > CMD > Ipconfig /flushdns. Also it wouldn't hurt to delete your temp files and cookies. Give that a try and let us know.

[kiraz]

Everything is working fine now since the last post. I think the DNS flush might have helped.

[FurryNutz]

Hope it keeps working for you.

Enjoy.