Is there any layer 3 device between client and dhcp server? Then you need dhcp relay agent, if that is not the case chk firewall. 
Thanks

On Tuesday, February 12, 2013, Michele Pinassi wrote:
Hi all,

i've just installed a FreeRadius server 2.2.0 with DHCP support because
i need a dhcp server that use MySQL ad a backend.

My network topology is:

eth0      inet addr:193.205.4.xxx [PUBLIC]
eth1      inet addr:172.20.1.2 [PRIVATE]

all dhcp requests and reply should come from eth1. Here is freeradius -X
dump:

FreeRADIUS Version 2.2.0, for host i486-pc-linux-gnu, built on Sep 20
2012 at 13:37:59
Copyright (C) 1999-2012 The FreeRADIUS server project and contributors.
There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A
PARTICULAR PURPOSE.
You may redistribute copies of FreeRADIUS under the terms of the
GNU General Public License v2.
Starting - reading configuration files ...
including configuration file /etc/freeradius/radiusd.conf
including configuration file /etc/freeradius/clients.conf
including files in directory /etc/freeradius/mods-enabled/
including configuration file /etc/freeradius/mods-enabled/replicate
including configuration file /etc/freeradius/mods-enabled/smsotp
including configuration file /etc/freeradius/mods-enabled/preprocess
including configuration file /etc/freeradius/mods-enabled/ldap
including configuration file /etc/freeradius/mods-enabled/counter
including configuration file /etc/freeradius/mods-enabled/detail.log
including configuration file /etc/freeradius/mods-enabled/otp
including configuration file /etc/freeradius/mods-enabled/inner-eap
including configuration file /etc/freeradius/mods-enabled/acct_unique
including configuration file /etc/freeradius/mods-enabled/wimax
including configuration file /etc/freeradius/mods-enabled/dynamic_clients
including configuration file /etc/freeradius/mods-enabled/etc_group
including configuration file /etc/freeradius/mods-enabled/redis
including configuration file /etc/freeradius/mods-enabled/cui
including configuration file /etc/freeradius/mods-enabled/ntlm_auth
including configuration file /etc/freeradius/mods-enabled/cache
including configuration file /etc/freeradius/mods-enabled/mac2ip
including configuration file /etc/freeradius/mods-enabled/dhcp_sqlippool
including configuration file /etc/freeradius/sql/mysql/ippool-dhcp.conf
including configuration file /etc/freeradius/mods-enabled/policy
including configuration file /etc/freeradius/mods-enabled/expiration
including configuration file /etc/freeradius/mods-enabled/logintime
including configuration file /etc/freeradius/mods-enabled/radutmp
including configuration file /etc/freeradius/mods-enabled/smbpasswd
including configuration file /etc/freeradius/mods-enabled/ippool
including configuration file /etc/freeradius/mods-enabled/rediswho
including configuration file /etc/freeradius/mods-enabled/pam
including configuration file /etc/freeradius/mods-enabled/soh
including configuration file /etc/freeradius/mods-enabled/detail.example.com
including configuration file /etc/freeradius/mods-enabled/realm
including configuration file /etc/freeradius/mods-enabled/mac2vlan
including configuration file /etc/freeradius/mods-enabled/attr_filter
including configuration file /etc/freeradius/mods-enabled/exec
including configuration file /etc/freeradius/mods-enabled/pap
including configuration file /etc/freeradius/mods-enabled/unix
including configuration file /etc/freeradius/mods-enabled/passwd
including configuration file /etc/freeradius/mods-enabled/echo
including configuration file /etc/freeradius/mods-enabled/sradutmp
including configuration file /etc/freeradius/mods-enabled/always
including configuration file /etc/freeradius/mods-enabled/checkval
including configuration file /etc/freeradius/mods-enabled/chap
including configuration file /etc/freeradius/mods-enabled/mschap
including configuration file /etc/freeradius/mods-enabled/krb5
including configuration file /etc/freeradius/mods-enabled/sql_log
including configuration file /etc/freeradius/mods-enabled/attr_rewrite
including configuration file /etc/freeradius/mods-enabled/files
including configuration file /etc/freeradius/mods-enabled/perl
including configuration file /etc/freeradius/mods-enabled/radrelay
including configuration file
/etc/freeradius/mods-enabled/sqlcounter_expire_on_login
including configuration file /etc/freeradius/mods-enabled/expr
including configuration file /etc/freeradius/mods-enabled/linelog
including configuration file /etc/freeradius/mods-enabled/opendirectory
including configuration file /etc/freeradius/mods-enabled/detail
including configuration file /etc/freeradius/mods-enabled/digest
including configuration file /etc/freeradius/eap.conf
including configuration file /etc/freeradius/sql.conf
including configuration file /etc/freeradius/sqlippool.conf
including configuration file /etc/freeradius/sql/mysql/ippool.conf
including configuration file /etc/freeradius/policy.conf
including files in directory /etc/freeradius/sites-enabled/
including configuration file /etc/freeradius/sites-enabled/dhcp
including configuration file /etc/freeradius/sites-enabled/default
main {
        user = "root"
        group = "freerad"
        allow_core_dumps = no
}
including dictionary file /etc/freeradius/dictionary
main {
        name = "freeradius"
        prefix = "/usr"
        localstatedir = "/var"
        sbindir = "/usr/sbin"
        logdir = "/var/log/freeradius"
        run_dir = "/var/run/freeradius"
        libdir = "/usr/lib/freeradius"
        radacctdir = "/var/log/freeradius/radacct"
        hostname_lookups = no
        max_request_time = 30
        cleanup_delay = 5
        max_requests = 1024
        pidfile = "/var/run/freeradius/freeradius.pid"
        checkrad = "/usr/sbin/checkrad"
        debug_level = 0
        proxy_requests = no
 log {
        stripped_names = no
        auth = no
        auth_badpass = no
        auth_goodpass = no
 }
 security {
        max_attributes = 200
        reject_delay = 1
        status_server = yes
 }
}
radiusd: #### Loading Realms and Home Servers ####
radiusd: #### Loading Clients ####
 client localhost {
        ipaddr = 127.0.0.1
        require_message_authenticator = no
        secret = "testing123"
        nastype = "other"
 }
radiusd: #### Instantiating modules ####
 instantiate {
 Module: Linked to module rlm_exec
 Module: Instantiating module "exec" from file
/etc/freeradius/mods-enabled/exec
  exec {
        wait = no
        input_pairs = "request"
        shell_escape = yes
  }
 Module: Linked to module rlm_expr
 Module: Instantiating module "expr" from file
/etc/freeradius/mods-enabled/expr
 Module: Linked to module rlm_expiration
 Module: Instantiating module "expiration" from file
/etc/freeradius/mods-enabled/expiration
  expiration {
        reply-message = "Password Has Expired  "
  }
 Module: Linked to module rlm_logintime
 Module: Instantiating module "logintime" from file
/etc/freeradius/mods-enabled/logintime
  logintime {
        reply-message = "You are calling outside your allowed timespan  "
        minimum-timeout = 60
  }
 }
radiusd: #### Loading Virtual Servers ####
server { # from file /etc/freeradius/radiusd.conf
 modules {
  Module: Creating Auth-Type = digest
  Module: Creating Post-Auth-Type = REJECT
 Module: Checking authenticate {...} for more modules to load
 Module: Linked to module rlm_pap
 Module: Instantiating module "pap" from file
/etc/freeradius/mods-enabled/pap
  pap {
        encryption_scheme = "auto"
        auto_header = no
  }
 Module: Linked to module rlm_chap
 Module: Instantiating module "chap" from file
/etc/freeradius/mods-enabled/chap
 Module: Linked to module rlm_mschap
 Module: Instantiating module "mschap" from file
/etc/freeradius/mods-enabled/mschap
  mschap {
        use_mppe = yes
        require_encryption = no
        require_strong = no
        with_ntdomain_hack = no
        allow_retry = yes
  }
 Module: Linked to module rlm_digest
 Module: Instantiating module "digest" from file
/etc/freeradius/mods-enabled/digest
 Module: Linked to module rlm_unix
 Module: Instantiating module "unix" from file
/etc/freeradius/mods-enabled/unix
  unix {
        radwtmp = "/var/log/freeradius/radwtmp"
  }
 Module: Linked to module rlm_eap
 Module: Instantiating module "eap" from file /etc/freeradius/eap.conf
  eap {
        default_eap_type = "md5"
        timer_expire = 60
        ignore_unknown_eap_types = no
        cisco_accounting_username_bug = no
        max_sessions = 4096
  }
 Module: Linked to sub-module rlm_eap_md5
 Module: Instantiating eap-md5
 Module: Linked to sub-module rlm_eap_leap
 Module: Instantiating eap-leap
 Module: Linked to sub-module rlm_eap_gtc
 Module: Instantiating eap-gtc
   gtc {
        challenge = "Password: "
        auth_type = "PAP"
   }
 Module: Linked to sub-module rlm_eap_tls
 Module: Instantiating eap-tls
   tls {
        rsa_key_exchange = no
        dh_key_exchange = yes
        rsa_key_length = 512
        dh_key_length = 512
        verify_depth = 0
        CA_path = "/etc/freeradius/certs"
        pem_file_type = yes
        private_key_file = "/etc/freeradius/certs/server.key"
        certificate_file = "/etc/freeradius/certs/server.pem"
        CA_file = "/etc/freeradius/certs/ca.pem"
        private_key_password = "whatever"
        dh_file = "/etc/freeradius/certs/dh"
        random_file = "/dev/urandom"
        fragment_size = 1024
        include_length = yes
        check_crl = no
        cipher_list = "DEFAULT"
        make_cert_command = "/etc/freeradius/certs/bootstrap"
        ecdh_curve = "prime256v1"
    cache {
        enable = no
        lifetime = 24
        max_entries = 255
    }
    verify {
    }
    ocsp {
        enable = no
        override_cert_url = yes
        url = "http://127.0.0.1/ocsp/"
        use_nonce = yes
        timeout = 0
        softfail = no
    }
   }
 Module: Linked to sub-module rlm_eap_ttls
 Module: Instantiating eap-ttls
   ttls {
        default_eap_type = "md5"
        copy_request_to_tunnel = no
        use_tunneled_reply = no
        virtual_server = "inner-tunnel"
        include_length = yes
   }
 Module: Linked to sub-module rlm_eap_peap
 Module: Instantiating eap-peap
   peap {
        default_eap_type = "mschapv2"
        copy_request_to_tunnel = no
        use_tunneled_reply = no
        proxy_tunneled_request_as_eap = yes
        virtual_server = "inner-tunnel"
        soh = no
   }
 Module: Linked to sub-module rlm_eap_mschapv2
 Module: Instantiating eap-mschapv2
   mschapv2 {
        with_ntdomain_hack = no
        send_error = no
   }
 Module: Checking authorize {...} for more modules to load
 Module: Linked to module rlm_preprocess
 Module: Instantiating module "preprocess" from file
/etc/freeradius/mods-enabled/preprocess
  preprocess {
        huntgroups = "/etc/freeradius/huntgroups"
        hints = "/etc/freeradius/hints"
        with_ascend_hack = no
        ascend_channels_per_line = 23
        with_ntdomain_hack = no
        with_specialix_jetstream_hack = no
        with_cisco_vsa_hack = no
        with_alvarion_vsa_hack = no
  }
reading pairlist file /etc/freeradius/huntgroups
reading pairlist file /etc/freeradius/hints
 Module: Linked to module rlm_realm
 Module: Instantiating module "suffix" from file
/etc/freeradius/mods-enabled/realm
  realm suffix {
        format = "suffix"
        delimiter = "@"
        ignore_default = no
        ignore_null = no
  }
 Module: Linked to module rlm_files
 Module: Instantiating module "files" from file
/etc/freeradius/mods-enabled/files
  files {
        usersfile = "/etc/freeradius/users"
        acctusersfile = "/etc/freeradius/acct_users"
        preproxy_usersfile = "/etc/freeradius/preproxy_users"
        compat = "no"
  }
reading pairlist file /etc/freeradius/users
reading pairlist file /etc/freeradius/acct_users
reading pairlist file /etc/freeradius/preproxy_users
 Module: Checking preacct {...} for more modules to load
 Module: Linked to module rlm_acct_unique
 Module: Instantiating module "acct_unique" from file
/etc/freeradius/mods-enabled/acct_unique
  acct_unique {
        key = "User-Name, Acct-Session-Id, NAS-IP-Address, NAS-Identifier,
NAS-Port"
  }
 Module: Checking accounting {...} for more modules to load
 Module: Linked to module rlm_detail
 Module: Instantiating module "detail" from file
/etc/freeradius/mods-enabled/detail
  detail {
        detailfile =
"/var/log/freeradius/radacct/%{%{Packet-Src-IP-Address}:-%{Packet-Src-IPv6-Address}}/detail-%Y%m%d"
        header = "%t"
        detailperm = 384
        dirperm = 493
        locking = no
        log_packet_header = no
  }
 Module: Linked to module rlm_attr_filter
 Module: Instantiating module "attr_filter.accounting_response" from
file /etc/freeradius/mods-enabled/attr_filter
  attr_filter attr_filter.accounting_response {
        attrsfile = "/etc/freeradius/attrs.accounting_response"
        key = "%{User-Name}"
        relaxed = no
  }
reading pairlist file /etc/freeradius/attrs.accounting_response
 Module: Checking session {...} for more modules to load
 Module: Linked to module rlm_radutmp
 Module: Instantiating module "radutmp" from file
/etc/freeradius/mods-enabled/radutmp
  radutmp {
        filename = "/var/log/freeradius/radutmp"
        username = "%{User-Name}"
        case_sensitive = yes
        check_with_nas = yes
        perm = 384
        callerid = yes
  }
 Module: Checking post-proxy {...} for more modules to load
 Module: Checking post-auth {...} for more modules to load
 Module: Instantiating module "attr_filter.access_reject" from file
/etc/freeradius/mods-enabled/attr_filter
  attr_filter attr_filter.access_reject {
        attrsfile = "/etc/freeradius/attrs.access_reject"
        key = "%{User-Name}"
        relaxed = no
  }
reading pair
--
Michele Pinassi
Responsabile Telefonia di Ateneo
Servizio Reti, Sistemi e Sicurezza Informatica - Universitą degli Studi
di Siena
tel: 0577.(23)2169 - fax: 0577.(23)2053

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