Why cannot I connect to some websites for extra machines but not primary machine connected to MN-700

i have a home network connected with MN-700 as the base station. my main
computer (computer A) is hard-wired connected to the base station, and an
auxillary computer (computer B) is connected also hard-wired to the station.
a laptop (computer C) is connected wirelessly to the network. compuer A
serves as the primary computer that is used to manage the station.

recently, i have been unable to assess certain websites (such as
http://www.leo.am) with computer B and C, but computer A was able to access
it without problem. i had turned off all software firewalls, scanned for
viruses/spywares (none found), but still unable to fix the problem. i tried
renewing the DHCP assigments, but still no work.

on computer B and C, when i use cmd "tracert www.leo.am", it says it is
unable to resolve DNS, but when i use the same cmd on computer A, it is able
to resolve the DNS. it is very puzzling....

PLEASE help!!!

 

Sounds more like a DNS issue on the two computers than a problem with the
router, Philip. Try opening a command prompt window (Start/Run insert "CMD"
to pull up the Command Prompt) then put in "ipconfig /flushdns" without the
quotes. Restart the systems and see if there's any difference. If that
doesn't work, please post back with any error messages you're seeing, which
browser you're using and whether or not the site has been listed among your
"trusted sites" in your browser.