login with active directory autentication in asp.net c# -


i creating asp.net web application. in used active directory login. have 1 group named validusers, when user logged in checks user validusers group. if user exists in group login successful, if not login failed.

i did things, works in local machine, not working when publishing website. got following error

 logon failure: unknown user name or bad password.

on machine works good,while publishing got error.i used below code reference

principalcontext ctx = new principalcontext(contexttype.domain, "domainname"); system.security.principal.windowsidentity myidentity = system.security.principal.windowsidentity.getcurrent(); string loguser = myidentity.name.tostring(); userprincipal user = userprincipal.findbyidentity(ctx, loguser); groupprincipal group = groupprincipal.findbyidentity(ctx, "validusers");validusers---->groupname  if (user.ismemberof(group))  {     login success  } else { login failed }

it check logged user validusers group.if user exists in group login success other wise failed login. got error when published website.please give solution

although had supplied little information domain , network relationship development machine , web server, assume web server has no physical connection active directory server depend code on. should impossible web server query ad directory. if web , ad servers on same network may need work on firewall settings of both web server , ad server make sure can communicate. if web , ad server have no communication problems should check availability of "validusers" code running @ web server. iis applications run user account defined application pool hosts application, should make sure app pool identity has enough rights access delicate information.


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