Stopping LDAP searches during each part of EAP session?

9 Jan 2008

      I have a freeradius server configured to do both EAP-TLS and LDAP auth.  It
works great so far.  If I have a cert. configured, then I'm authenticated
with the cert.  If I don't have a cert then I get prompted for my un/pw on
my NAS's Captive Portal page, which then passes my username/password on to
the Radius server which then checks my LDAP server if my un/pw are correct.

When I look through the debug logs, however, I see that the rlm_ldap module
is doing an LDAP search for my username during each stage of the EAP
session.  Is there a way to configure freeradius so that it won't try LDAP
auth in the middle of an EAP session?

Here's my radiusd.conf:

prefix = /usr
exec_prefix = /usr
sysconfdir = /etc
localstatedir = /var
sbindir = /usr/sbin
logdir = ${localstatedir}/log/radius
raddbdir = ${sysconfdir}/raddb
radacctdir = ${logdir}/radacct
confdir = ${raddbdir}
run_dir = ${localstatedir}/run/radiusd
log_file = ${logdir}/radius.log
libdir = /usr/lib
pidfile = ${run_dir}/radiusd.pid
user = radius
group = radius
max_request_time = 30
delete_blocked_requests = no
cleanup_delay = 5
max_requests = 8192
bind_address = *
port = 0
hostname_lookups = no
allow_core_dumps = no
regular_expressions     = yes
extended_expressions    = yes
log_stripped_names = no
log_auth = yes
log_auth_badpass = no
log_auth_goodpass = no
usercollide = no
lower_user = after
lower_pass = no
nospace_user = no
nospace_pass = no
checkrad = ${sbindir}/checkrad
security {
        max_attributes = 200
        reject_delay = 0
        status_server = yes
}
proxy_requests  = no
$INCLUDE  ${confdir}/clients.conf
snmp    = no
thread pool {
        start_servers = 10
        max_servers = 128
        min_spare_servers = 3
        max_spare_servers = 20
        max_requests_per_server = 0
}
modules {
        pap {
                encryption_scheme = crypt
        }
        chap {
                authtype = CHAP
        }
        pam {
                pam_auth = radiusd
        }
        unix {
                cache = no
                cache_reload = 600
                shadow = /etc/shadow
                radwtmp = ${logdir}/radwtmp
        }
$INCLUDE ${confdir}/eap.conf
        mschap {
                authtype = MS-CHAP
        }
        ldap {
                server = "ldap.mycompany.com"
                basedn = "ou=people,dc=mycompany,dc=com"
                filter =
"(&(accountInstance=wireless)(uid=%{Stripped-User-Name:-%{User-Name}}))"
                start_tls = yes
                dictionary_mapping = ${raddbdir}/ldap.attrmap
                ldap_connections_number = 25
                timeout = 10
                timelimit = 10
                net_timeout = 1
                access_attr_used_for_allow = yes
        }
        realm suffix {
                format = suffix
                delimiter = "@"
                ignore_default = no
                ignore_null = no
        }
        realm realmpercent {
                format = suffix
                delimiter = "%"
                ignore_default = no
                ignore_null = no
        }
        realm ntdomain {
                format = prefix
                delimiter = "\\"
                ignore_default = no
                ignore_null = no
        }
        checkval {
                item-name = Calling-Station-Id
                check-name = Calling-Station-Id
                data-type = string
        }
        preprocess {
                huntgroups = ${confdir}/huntgroups
                hints = ${confdir}/hints
                with_ascend_hack = no
                ascend_channels_per_line = 23
                with_ntdomain_hack = no
                with_specialix_jetstream_hack = no
                with_cisco_vsa_hack = no
        }
        files {
                usersfile = ${confdir}/users
                acctusersfile = ${confdir}/acct_users
                compat = no
        }
        detail {
                detailfile =
${radacctdir}/%{Client-IP-Address}/detail-%Y%m%d
                detailperm = 0600
        }
        acct_unique {
                key = "User-Name, Acct-Session-Id, NAS-IP-Address,
Client-IP-Address, NAS-Port"
        }
        radutmp {
                filename = ${logdir}/radutmp
                username = %{User-Name}
                case_sensitive = yes
                check_with_nas = yes
                perm = 0600
                callerid = "yes"
        }
        radutmp sradutmp {
                filename = ${logdir}/sradutmp
                perm = 0644
                callerid = "no"
        }
        attr_filter {
                attrsfile = ${confdir}/attrs
        }
        counter daily {
                filename = ${raddbdir}/db.daily
                key = User-Name
                count-attribute = Acct-Session-Time
                reset = daily
                counter-name = Daily-Session-Time
                check-name = Max-Daily-Session
                allowed-servicetype = Framed-User
                cache-size = 5000
        }
        always fail {
                rcode = fail
        }
        always reject {
                rcode = reject
        }
        always ok {
                rcode = ok
                simulcount = 0
                mpp = no
        }
        expr {
        }
        digest {
        }
        exec {
                wait = yes
                input_pairs = request
        }
        exec echo {
                wait = yes
                program = "/bin/echo %{User-Name}"
                input_pairs = request
                output_pairs = reply
        }
        ippool main_pool {
                range-start = 192.168.1.1
                range-stop = 192.168.3.254
                netmask = 255.255.255.0
                cache-size = 800
                session-db = ${raddbdir}/db.ippool
                ip-index = ${raddbdir}/db.ipindex
                override = no
                maximum-timeout = 0
        }
}
instantiate {
        expr
}
authorize {
        preprocess
        mschap
        eap
        files
        ldap
}
authenticate {
        Auth-Type MS-CHAP {
                mschap
        }
        eap
        Auth-Type LDAP {
                ldap
        }
}
preacct {
        preprocess
        acct_unique
        files
}
accounting {
}
session {
}
post-auth {
}
pre-proxy {
}
post-proxy {
}

Here's my eap.conf:

eap {
                default_eap_type = ttls
                timer_expire     = 60
                ignore_unknown_eap_types = no
                cisco_accounting_username_bug = no
                md5 {
                }
                tls {
                        private_key_password =
                        private_key_file =
/etc/raddb/certs/mycompany.com.key
                        certificate_file =
/etc/raddb/certs/mycompany.com.crt
                        CA_path = /etc/raddb/certs
                        dh_file = /etc/raddb/certs/dh
                        random_file = /etc/raddb/certs/random
                        fragment_size = 1024
                        include_length = yes
                        check_crl = yes
                }
                ttls {
                        default_eap_type = mschapv2
                        copy_request_to_tunnel = no
                        use_tunneled_reply = no

                }
                peap {
                        default_eap_type = mschapv2
                }
                mschapv2 {
                }
        }

Stopping LDAP searches during each part of EAP session?

Matt Alexander