If you want to setup netgear router then follow this article-How to Setup Netgear Router.
Step1: open your web browser and type "http://192.168.0.1” to access the Netgear router's admin menu. Type the router's user name and password. If you haven't already changed the settings, enter "admin" for the user name and "password" for the password.
Step2: Click "OK." And then click the "Security" option at the left end of the window, and then select "Firewall Rules." Select the "Add" button underneath the "Inbound" heading.
Step3: Click on the "Any" option from the "Service" list and choose the "Allow Always" option in the "Action" list. Click "Apply" to set the new rule as active.
Step4: Click on the "WAN Setup" option under “Advanced" heading at the left end of the window. Click the check box labeled "Disable Port Scan and DOS protection."
Step5: After completing the all above steps, click on apply button and then logout to disable the Netgear DG835G's firewall.
If you want to configure netgear DG834G router, follow this blog -How to Configure NetGear DG834G.
Note:To get netgear tech support,you can reach online technical support service desk of V tech-squad at their Toll Free No +1-877-452-9201.