Hi,Looking through archives for this exact question, I see a post from 2008 (http://www.mail-archive.com/freeradius-users@lists.freeradius.org/msg47423.html) where this exact question was previously asked.Here is my server version info:radiusd: FreeRADIUS Version 2.2.0, for host x86_64-unknown-linux-gnu, built on Feb 17 2013 at 03:34:41Here's my code:# Construct HTTP requestmy $authresult = &authamis($RAD_REQUEST{'User-Name'},$RAD_REQUEST{'User-Password'});&radiusd::radlog(L_DBG, "Result after authamis call -> $authresult");if($authresult eq "true") {$RAD_CHECK{'Response-Packet-Type'} = "Access-Challenge";$RAD_REPLY{'Reply-Message'} = "authentication successful";for (keys %RAD_REPLY) {&radiusd::radlog(L_DBG, "RAD_REPLY: $_ = $RAD_REPLY{$_}");}for (keys %RAD_CHECK) {&radiusd::radlog(L_DBG, "RAD_CHECK: $_ = $RAD_CHECK{$_}");}for (keys %RAD_CONFIG) {&radiusd::radlog(L_DBG, "RAD_CONFIG: $_ = $RAD_CONFIG{$_}");}return RLM_MODULE_OK}else {$RAD_REPLY{'Reply-Message'} = "authentication failure";return RLM_MODULE_REJECT;}Here is the relevant debug output:Found Auth-Type = perl# Executing group from file /opt/app/freeradius/etc/raddb/sites-enabled/default+- entering group perl {...}rlm_perl: RAD_REQUEST: User-Name = testrlm_perl: RAD_REQUEST: User-Password = 42594190rlm_perl: RAD_REQUEST: NAS-IP-Address = 192.168.65.1rlm_perl: AMIS request: http://amis.jdt.com:8080/auth/authenticate/test/42594190rlm_perl: Result after authamis call -> truerlm_perl: RAD_REPLY: Reply-Message = authentication successfulrlm_perl: RAD_CHECK: Response-Packet-Type = Access-Challengerlm_perl: RAD_CHECK: Auth-Type = perlrlm_perl: RAD_CONFIG: Auth-Type = perlrlm_perl: Added pair User-Name = testrlm_perl: Added pair User-Password = 42594190rlm_perl: Added pair NAS-IP-Address = 192.168.65.1rlm_perl: Added pair Reply-Message = authentication successfulrlm_perl: Added pair Response-Packet-Type = Access-Challengerlm_perl: Added pair Auth-Type = perl++[perl] returns ok# Executing section post-auth from file /opt/app/freeradius/etc/raddb/sites-enabled/default+- entering group post-auth {...}++[exec] returns noopSending Access-Accept of id 81 to 192.168.65.1 port 53504Reply-Message = "authentication successful"Finished request 0.Going to the next requestClearly the Access-Challenge setting is not being honored by the server. Is there another attribute that must be set to configure the response type?Thanks,Walter