Dear all. Should I configure DNS service on the FreeRadius host When I Use chap authentication method from my router.. please advice. Thanks, Mohammed Ejaz Asst. Operation Director of Systems. Cyberia SAUDI ARABIA P.O.Box: 301079, Riyadh 11372 Phone: (+966) 11 464 7114 Ext. 140 Mobile: (+966) 562311787 Fax: (+966) 11 465 4735 Website: http://www.cyberia.net.sa