I am trying to starting radius(default server) and tacacs at the same time, both with mschap.My tacacs server can work properly alone, so I just add the default file back to the sites-enabled dictionary. Also, according to the mschap module page, I put two attibutes parts in the mschap file(One for tacacs and One for radius). Debug Info is as followed: including configuration file /usr/local/etc/raddb/radiusd.conf Including files in directory "/usr/local/etc/raddb/template.d/" including configuration file /usr/local/etc/raddb/template.d/default including configuration file /usr/local/etc/raddb/clients.conf Including files in directory "/usr/local/etc/raddb/global.d/" including configuration file /usr/local/etc/raddb/global.d/ldap including configuration file /usr/local/etc/raddb/global.d/python Including files in directory "/usr/local/etc/raddb/mods-enabled/" including configuration file /usr/local/etc/raddb/mods-enabled/always including configuration file /usr/local/etc/raddb/mods-enabled/attr_filter including configuration file /usr/local/etc/raddb/mods-enabled/cache_eap including configuration file /usr/local/etc/raddb/mods-enabled/chap including configuration file /usr/local/etc/raddb/mods-enabled/client including configuration file /usr/local/etc/raddb/mods-enabled/delay including configuration file /usr/local/etc/raddb/mods-enabled/detail including configuration file /usr/local/etc/raddb/mods-enabled/detail.log including configuration file /usr/local/etc/raddb/mods-enabled/digest including configuration file /usr/local/etc/raddb/mods-enabled/eap including configuration file /usr/local/etc/raddb/mods-enabled/eap_inner including configuration file /usr/local/etc/raddb/mods-enabled/echo including configuration file /usr/local/etc/raddb/mods-enabled/escape including configuration file /usr/local/etc/raddb/mods-enabled/exec including configuration file /usr/local/etc/raddb/mods-enabled/files including configuration file /usr/local/etc/raddb/mods-enabled/linelog including configuration file /usr/local/etc/raddb/mods-enabled/mschap including configuration file /usr/local/etc/raddb/mods-enabled/ntlm_auth including configuration file /usr/local/etc/raddb/mods-enabled/pap including configuration file /usr/local/etc/raddb/mods-enabled/passwd including configuration file /usr/local/etc/raddb/mods-enabled/radutmp including configuration file /usr/local/etc/raddb/mods-enabled/sradutmp including configuration file /usr/local/etc/raddb/mods-enabled/stats including configuration file /usr/local/etc/raddb/mods-enabled/unix including configuration file /usr/local/etc/raddb/mods-enabled/unpack including configuration file /usr/local/etc/raddb/mods-enabled/utf8 Including files in directory "/usr/local/etc/raddb/policy.d/" including configuration file /usr/local/etc/raddb/policy.d/abfab-tr including configuration file /usr/local/etc/raddb/policy.d/accounting including configuration file /usr/local/etc/raddb/policy.d/canonicalisation including configuration file /usr/local/etc/raddb/policy.d/control including configuration file /usr/local/etc/raddb/policy.d/cui including configuration file /usr/local/etc/raddb/policy.d/debug including configuration file /usr/local/etc/raddb/policy.d/dhcp including configuration file /usr/local/etc/raddb/policy.d/eap including configuration file /usr/local/etc/raddb/policy.d/filter including configuration file /usr/local/etc/raddb/policy.d/operator-name including configuration file /usr/local/etc/raddb/policy.d/time including configuration file /usr/local/etc/raddb/policy.d/vendor Including files in directory "/usr/local/etc/raddb/sites-enabled/" including configuration file /usr/local/etc/raddb/sites-enabled/default Loaded module process_radius including configuration file /usr/local/etc/raddb/sites-enabled/inner-tunnel Loaded module process_tacacs including configuration file /usr/local/etc/raddb/sites-enabled/tacacs Parsing initial logging configuration. main {   prefix = /usr/local   log {     destination = files     syslog_facility = daemon     local_state_dir = "/usr/local/var"     logdir = "/usr/local/var/log"     file = /usr/local/var/log/radius/radius.log     suppress_secrets = no   } } Parsing security rules to bootstrap UID / GID / chroot / etc. main {   log {   }   security {     allow_core_dumps = no     allow_vulnerable_openssl = no     openssl_fips_mode = no   }   name = radiusd   local_state_dir = "/usr/local/var"   run_dir = /usr/local/var/run/radiusd } Parsing main configuration main {   server default {     namespace = radius     radius {       Access-Request {         log {           stripped_names = no           auth = no           auth_badpass = no           auth_goodpass = no           msg_denied = "You are already logged in - access denied"         }         session {           timeout = 15           max = 4096         }       }     } Loaded module proto_radius     listen {       type = Access-Request       type = Status-Server       transport = udp Loaded module proto_radius_udp       udp {         ipaddr = *         port = 1812         networks {           allow = 127/8           allow = 192.0.2/24         }         max_packet_size = 4096         max_attributes = 255       }       limit {         cleanup_delay = 5.0         idle_timeout = 60.0         nak_lifetime = 30.0         max_connections = 256         max_clients = 256         max_pending_packets = 256       }       priority {         Access-Request = high         Accounting-Request = low         CoA-Request = normal         Disconnect-Request = low         Status-Server = now       }     }     listen tcp_auth {       type = Access-Request       type = Status-Server       transport = tcp Loaded module proto_radius_tcp       tcp {         ipaddr = *         port = 1812         networks {           allow = 127/8           allow = 192.0.2/24         }         max_packet_size = 4096         max_attributes = 255       }       limit {         cleanup_delay = 5.0         idle_timeout = 30.0         nak_lifetime = 30.0         max_connections = 1024         max_clients = 256         max_pending_packets = 256       }       priority {         Access-Request = high         Accounting-Request = low         CoA-Request = normal         Disconnect-Request = low         Status-Server = now       }     }     listen udp_acct {       type = Accounting-Request       transport = udp       udp {         ipaddr = *         port = 1813         networks {         }         max_packet_size = 4096         max_attributes = 255       }       limit {         cleanup_delay = 5.0         idle_timeout = 30.0         nak_lifetime = 30.0         max_connections = 1024         max_clients = 256         max_pending_packets = 256       }       priority {         Access-Request = high         Accounting-Request = low         CoA-Request = normal         Disconnect-Request = low         Status-Server = now       }     }   }   server inner-tunnel {     namespace = tacacs     tacacs {       Authentication {         log {           stripped_names = no           auth = no           auth_badpass = no           auth_goodpass = no           msg_denied = "You are already logged in - access denied"         }         session {           timeout = 15           max = 4096           max_rounds = 4         }       }     } Loaded module proto_tacacs     listen {       type = Authentication-Start       type = Authentication-Continue       type = Authorization-Request       type = Accounting-Request       transport = tcp Loaded module proto_tacacs_tcp       tcp {         ipaddr = 127.0.0.1         port = 18121         networks {         }         max_packet_size = 4096         max_attributes = 256       }       limit {         idle_timeout = 30.0         max_connections = 1024       }       priority {         Authentication-Start = high         Authentication-Continue = high         Authorization-Request = normal         Accounting-Request = low       }     }   }   server tacacs {     namespace = tacacs     tacacs {       Authentication {         log {           stripped_names = no           auth = no           auth_badpass = no           auth_goodpass = no           msg_denied = "You are already logged in - access denied"         }         session {           timeout = 15           max = 4096           max_rounds = 4         }       }     }     listen {       type = Authentication-Start       type = Authentication-Continue       type = Authorization-Request       type = Accounting-Request       transport = tcp       tcp {         ipaddr = *         port = 49         networks {         }         max_packet_size = 4096         max_attributes = 256       }       limit {         idle_timeout = 60.0         max_connections = 256       }       priority {         Authentication-Start = high         Authentication-Continue = high         Authorization-Request = normal         Accounting-Request = low       }     }   }   log {     colourise = yes   }   security {   }   sbin_dir = "/usr/local/sbin"   logdir = /usr/local/var/log/radius   radacctdir = /usr/local/var/log/radius/radacct   reverse_lookups = no   hostname_lookups = yes   max_request_time = 30   pidfile = /usr/local/var/run/radiusd/radiusd.pid   debug_level = 0   max_requests = 16384   resources {   }   thread pool {     num_networks = 1 Dynamically determined thread.workers = 15     num_workers = 15     openssl_async_pool_init = 64     openssl_async_pool_max = 1024   }   migrate {     rewrite_update = false     forbid_update = false   }   interpret {   } } Switching to configured log settings radiusd: #### Loading Clients ####   client localhost {     ipaddr = 127.0.0.1     secret = <<< secret >>>     require_message_authenticator = no     proto = *     limit {       max_connections = 16       lifetime = 0       idle_timeout = 30     }   }   client localhost_ipv6 {     ipv6addr = ::1     secret = <<< secret >>>     limit {       max_connections = 16       lifetime = 0       idle_timeout = 30s     }   }   client test {     ipaddr = 192.168.2.3     secret = <<< secret >>>     limit {       max_connections = 16       lifetime = 0       idle_timeout = 30s     }   } Debugger not attached trigger { ... } subsection not found, triggers will be disabled #### Instantiating libraries #### #### Bootstrapping process modules #### Bootstrapping process_radius "default" Creating Auth-Type = pap Creating Auth-Type = chap Creating Auth-Type = mschap Creating Auth-Type = digest Creating Auth-Type = ldap Creating Auth-Type = eap Bootstrapping process_tacacs "inner-tunnel" Bootstrapping process_tacacs "tacacs" Creating Auth-Type = MSCHAPv2 Creating Auth-Type = ASCII #### Bootstrapping protocol modules #### Bootstrapping proto_radius "default.radius"     client localhost {       ipaddr = 192.0.2.1       secret = <<< secret >>>       shortname = sample       limit {         max_connections = 16         lifetime = 0         idle_timeout = 30s       }     } Bootstrapping proto_radius "default.tcp_auth" Bootstrapping proto_radius "default.udp_acct" Bootstrapping proto_tacacs "inner-tunnel.tacacs" Ignoring "nak_lifetime = 0", forcing to "nak_lifetime = 1" Bootstrapping proto_tacacs "tacacs.tacacs" Ignoring "nak_lifetime = 0", forcing to "nak_lifetime = 1"     client tacacs {       ipaddr = 192.168.2.3       secret = <<< secret >>>       proto = tcp       limit {         max_connections = 16         lifetime = 0         idle_timeout = 30s       }     } #### Instantiating libraries #### #### Bootstrapping modules ####  modules { Loaded module rlm_always     always reject {       rcode = reject       simulcount = 0       mpp = no     }     always fail {       rcode = fail       simulcount = 0       mpp = no     }     always ok {       rcode = ok       simulcount = 0       mpp = no     }     always handled {       rcode = handled       simulcount = 0       mpp = no     }     always invalid {       rcode = invalid       simulcount = 0       mpp = no     }     always disallow {       rcode = disallow       simulcount = 0       mpp = no     }     always notfound {       rcode = notfound       simulcount = 0       mpp = no     }     always noop {       rcode = noop       simulcount = 0       mpp = no     }     always updated {       rcode = updated       simulcount = 0       mpp = no     } Loaded module rlm_attr_filter     attr_filter attr_filter.pre-proxy {       filename = /usr/local/etc/raddb/mods-config/attr_filter/pre-proxy       key = "%{Realm}"       relaxed = no     }     attr_filter attr_filter.post-proxy {       filename = /usr/local/etc/raddb/mods-config/attr_filter/post-proxy       key = "%{Realm}"       relaxed = no     }     attr_filter attr_filter.access_reject {       filename = /usr/local/etc/raddb/mods-config/attr_filter/access_reject       key = "%{User-Name}"       relaxed = no     }     attr_filter attr_filter.access_challenge {       filename = /usr/local/etc/raddb/mods-config/attr_filter/access_challenge       key = "%{User-Name}"       relaxed = no     }     attr_filter attr_filter.accounting_response {       filename = /usr/local/etc/raddb/mods-config/attr_filter/accounting_response       key = "%{User-Name}"       relaxed = no     } Loaded module rlm_cache     cache cache_eap {       driver = rbtree Loaded module rlm_cache_rbtree       key = %{&control.State || &reply.State || &State}       ttl = 15       max_entries = 0       epoch = 0       add_stats = no     } Loaded module rlm_chap     chap {       min_challenge_len = 16     } Loaded module rlm_client Loaded module rlm_delay     delay {       delay = 1.0s       relative = no       force_reschedule = no     }     delay delay_reject {       delay = "%{&reply.FreeRADIUS-Response-Delay || 1}"       relative = yes       force_reschedule = no     } Loaded module rlm_detail     detail {       filename = /usr/local/var/log/radius/radacct/%{Net.Src.IP}/detail-%Y-%m-%d       header = %t       permissions = 0600       locking = no       escape_filenames = no       log_packet_header = no     }     detail auth_log {       filename = /usr/local/var/log/radius/radacct/%{Net.Src.IP}/auth-detail-%Y-%m-%d       header = %t       permissions = 0600       locking = no       escape_filenames = no       log_packet_header = no     }     detail reply_log {       filename = /usr/local/var/log/radius/radacct/%{Net.Src.IP}/reply-detail-%Y-%m-%d       header = %t       permissions = 0600       locking = no       escape_filenames = no       log_packet_header = no     }     detail pre_proxy_log {       filename = /usr/local/var/log/radius/radacct/%{Net.Src.IP}/pre-proxy-detail-%Y-%m-%d       header = %t       permissions = 0600       locking = no       escape_filenames = no       log_packet_header = no     }     detail post_proxy_log {       filename = /usr/local/var/log/radius/radacct/%{Net.Src.IP}/post-proxy-detail-%Y-%m-%d       header = %t       permissions = 0600       locking = no       escape_filenames = no       log_packet_header = no     } Loaded module rlm_digest Loaded module rlm_eap     eap {       require_identity_realm = nai       type = md5 Loaded module rlm_eap_md5       type = gtc Loaded module rlm_eap_gtc       gtc {         challenge = "Password: "         auth_type = PAP       }       type = tls Loaded module rlm_eap_tls       tls {         tls = tls-common         require_client_cert = yes         include_length = yes       }       type = ttls Loaded module rlm_eap_ttls       ttls {         tls = tls-common         virtual_server = "inner-tunnel"         include_length = yes         require_client_cert = no       }       type = mschapv2 Loaded module rlm_eap_mschapv2       mschapv2 {         with_ntdomain_hack = no         auth_type = mschap         send_error = no       }       type = peap Loaded module rlm_eap_peap       peap {         tls = tls-common         virtual_server = "inner-tunnel"         require_client_cert = no       }       ignore_unknown_eap_types = no     }     eap inner-eap {       require_identity_realm = nai       default_eap_type = mschapv2       type = md5       type = gtc       gtc {         challenge = "Password: "         auth_type = PAP       }       type = mschapv2       mschapv2 {         with_ntdomain_hack = no         auth_type = mschap         send_error = no       }       type = tls       tls {         tls = tls-peer         require_client_cert = yes         include_length = yes       }       ignore_unknown_eap_types = no     } Loaded module rlm_exec     exec echo {       wait = yes       input_pairs = &request       output_pairs = &reply       shell_escape = yes       env_inherit = no     } Loaded module rlm_escape     escape {       safe_characters = "@abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789.-_: /äéöüàâæçèéêëîïôœùûüaÿÄÉÖÜßÀÂÆÇÈÉÊËÎÏÔŒÙÛÜŸ"     }     exec {       wait = yes       input_pairs = &request       shell_escape = yes       env_inherit = no       timeout = 10     } Loaded module rlm_files     files {       filename = /usr/local/etc/raddb/mods-config/files/authorize       acctusersfile = /usr/local/etc/raddb/mods-config/files/accounting       key = %{%{Stripped-User-Name}:-%{User-Name}}     } Loaded module rlm_linelog     linelog {       destination = file       delimiter = "\n"       format = "This is a log message for %{User-Name}"       reference = "messages.%{&reply.Packet-Type || 'default'}"       file {         filename = /usr/local/var/log/radius/linelog         permissions = 0600         escape_filenames = no       }       syslog {         severity = "info"       }       unix {       }       tcp {         server = localhost         port = 514         timeout = 2.0       }       udp {         server = localhost         port = 514         timeout = 2.0       }     }     linelog log_accounting {       destination = file       delimiter = "\n"       format = ""       reference = "Accounting-Request.%{&Acct-Status-Type || 'unknown'}"       file {         filename = /usr/local/var/log/radius/linelog-accounting         permissions = 0600         escape_filenames = no       }       syslog {         severity = "info"       }       unix {       }       tcp {         timeout = 1000       }       udp {         timeout = 1000       }     } Loaded module rlm_mschap     mschap {       normalise = yes       use_mppe = yes       require_encryption = no       require_strong = no       with_ntdomain_hack = yes       passchange {       }       allow_retry = yes       winbind {       }     }     exec ntlm_auth {       wait = yes       shell_escape = yes       env_inherit = no     } Loaded module rlm_pap     pap {       normalise = yes     } Loaded module rlm_passwd     passwd etc_passwd {       filename = /etc/passwd       format = "*User-Name:Crypt-Password:"       delimiter = ":"       ignore_nislike = no       ignore_empty = yes       allow_multiple_keys = no       hash_size = 100     } Loaded module rlm_radutmp     radutmp {       filename = /usr/local/var/log/radius/radutmp       username = %{User-Name}       check_with_nas = yes       permissions = 0600       caller_id = no     }     radutmp sradutmp {       filename = /usr/local/var/log/radius/sradutmp       username = "%{User-Name}"       check_with_nas = yes       permissions = 0644       caller_id = no     } Loaded module rlm_stats     stats {     } Loaded module rlm_unix     unix {     } Loaded module rlm_unpack Loaded module rlm_utf8 #### Bootstrapping rlm modules #### Bootstrapping rlm_cache "cache_eap" Bootstrapping rlm_chap "chap" Bootstrapping rlm_delay "delay" Bootstrapping rlm_delay "delay_reject" Bootstrapping rlm_always "disallow" Bootstrapping rlm_eap "eap" Bootstrapping rlm_exec "echo" Bootstrapping rlm_escape "escape" Bootstrapping rlm_exec "exec" Bootstrapping rlm_always "fail" Bootstrapping rlm_always "handled" Bootstrapping rlm_eap "inner-eap" Bootstrapping rlm_always "invalid" Bootstrapping rlm_linelog "linelog" Bootstrapping rlm_linelog "log_accounting" Bootstrapping rlm_mschap "mschap" Bootstrapping rlm_always "noop" Bootstrapping rlm_always "notfound" Bootstrapping rlm_exec "ntlm_auth" Bootstrapping rlm_always "ok" Bootstrapping rlm_always "reject" Bootstrapping rlm_unix "unix" Bootstrapping rlm_always "updated"  } # modules #### Instantiating listeners #### Compiling policies in server default { ... } Instantiating proto_radius "default.radius" Instantiating proto_radius "default.tcp_auth" Instantiating proto_radius "default.udp_acct" Instantiating process_radius "default" Compiling policies in - recv Access-Request {...} /usr/local/etc/raddb/policy.d/time[13]: Skipping remaining instructions due to 'return' /usr/local/etc/raddb/policy.d/time[18]: Please use the 'filter' keyword for attribute filtering Compiling policies in - send Access-Accept {...} Compiling policies in - send Access-Challenge {...} Compiling policies in - send Access-Reject {...} Compiling policies in - recv Accounting-Request {...} Compiling policies in - send Accounting-Response {...} Compiling policies in - recv Status-Server {...} Compiling policies in - authenticate pap {...} Compiling policies in - authenticate chap {...} Compiling policies in - authenticate mschap {...} Compiling policies in - authenticate digest {...} Compiling policies in - authenticate ldap {...} Compiling policies in - authenticate eap {...} Compiling policies in - accounting Start {...} Compiling policies in - accounting Stop {...} Compiling policies in - accounting Interim-Update {...} Compiling policies in - accounting Accounting-On {...} Compiling policies in - accounting Accounting-Off {...} Compiling policies in - accounting Failed {...} /usr/local/etc/raddb/sites-enabled/default[80]: radius  { ... } section is unused /usr/local/etc/raddb/sites-enabled/default[224]: dictionary  { ... } section is unused Compiling policies in server inner-tunnel { ... } Instantiating proto_tacacs "inner-tunnel.tacacs" Instantiating process_tacacs "inner-tunnel" Compiling policies in - authenticate pap {...} Compiling policies in - authenticate chap {...} Compiling policies in - authenticate mschap {...} /usr/local/etc/raddb/mods-enabled/mschap[384]: Failed to parse configuration item 'chap_challenge = &Vendor-Specific.Microsoft.CHAP-Challenge': Attribute 'Vendor-Specific.Microsoft.CHAP-Challenge' not found.  Searched in: TACACS, internal /usr/local/etc/raddb/mods-enabled/mschap[384]: Unresolved attributes are not allowed here /usr/local/etc/raddb/sites-enabled/inner-tunnel[201]: Invalid keyword "mschap". I guess i did not configure right to start two servers at the same time. Thanks for your help and I am looking forward to hearing your suggestions!! Licheng Huang 2071264258@qq.com