DHCP: ARP issue, FR2.x vs FR 3.x
Fajar A. Nugraha
list at fajar.net
Fri Jan 13 09:49:12 CET 2012
I'm trying to test a simple DHCP server implementation using FR. The setup:
- server is using dummy1 interface for dhcp server test purposes, IP
172.16.101.1
- client is using virtualbox running on server, with client's eth0
bridged to server's dummy1, tested using client's "dhclient" command.
- basic DHCP test using dnsmasq and FR 3 (with freeradius -X) on
server works fine, so there's no issue about using dummy interface and
virtualbox.
Then I test FR 2.2.0 (from v2.1.x git). The dhcp listen section is
different, so I adusted it accordingly. But there seems to be a
problem with arp, and the reply never recached the client (also
confirmed with tcpdump). Any idea how to make FR2's DHCP work, or at
least behaves similar to FR3?
FR2 debug log:
#===========================================================================
root at HP:/# freeradius -X
FreeRADIUS Version 2.2.0, for host i686-pc-linux-gnu, built on Jan 11
2012 at 17:20:48
Copyright (C) 1999-2009 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/proxy.conf
including configuration file /etc/freeradius/clients.conf
including files in directory /etc/freeradius/modules/
including configuration file /etc/freeradius/modules/radutmp
including configuration file /etc/freeradius/modules/realm
including configuration file /etc/freeradius/modules/detail.log
including configuration file /etc/freeradius/modules/linelog
including configuration file /etc/freeradius/modules/rediswho
including configuration file /etc/freeradius/modules/krb5
including configuration file /etc/freeradius/modules/expr
including configuration file /etc/freeradius/modules/cui
including configuration file /etc/freeradius/modules/replicate
including configuration file /etc/freeradius/modules/sradutmp
including configuration file /etc/freeradius/modules/checkval
including configuration file /etc/freeradius/modules/digest
including configuration file /etc/freeradius/modules/policy
including configuration file /etc/freeradius/modules/unix
including configuration file /etc/freeradius/modules/opendirectory
including configuration file /etc/freeradius/modules/counter
including configuration file /etc/freeradius/modules/perl
including configuration file /etc/freeradius/modules/chap
including configuration file /etc/freeradius/modules/redis
including configuration file /etc/freeradius/modules/attr_filter
including configuration file /etc/freeradius/modules/ntlm_auth
including configuration file /etc/freeradius/modules/mac2ip
including configuration file /etc/freeradius/modules/files
including configuration file /etc/freeradius/modules/etc_group
including configuration file /etc/freeradius/modules/expiration
including configuration file /etc/freeradius/modules/smsotp
including configuration file /etc/freeradius/modules/exec
including configuration file /etc/freeradius/modules/acct_unique
including configuration file /etc/freeradius/modules/ippool
including configuration file /etc/freeradius/modules/detail.example.com
including configuration file /etc/freeradius/modules/inner-eap
including configuration file /etc/freeradius/modules/pap
including configuration file /etc/freeradius/modules/wimax
including configuration file /etc/freeradius/modules/mschap
including configuration file /etc/freeradius/modules/pam
including configuration file /etc/freeradius/modules/smbpasswd
including configuration file /etc/freeradius/modules/otp
including configuration file /etc/freeradius/modules/echo
including configuration file /etc/freeradius/modules/sql_log
including configuration file /etc/freeradius/modules/soh
including configuration file /etc/freeradius/modules/ldap
including configuration file /etc/freeradius/modules/preprocess
including configuration file /etc/freeradius/modules/always
including configuration file /etc/freeradius/modules/mac2vlan
including configuration file /etc/freeradius/modules/sqlcounter_expire_on_login
including configuration file /etc/freeradius/modules/attr_rewrite
including configuration file /etc/freeradius/modules/logintime
including configuration file /etc/freeradius/modules/dynamic_clients
including configuration file /etc/freeradius/modules/detail
including configuration file /etc/freeradius/modules/passwd
including configuration file /etc/freeradius/modules/radrelay
including configuration file /etc/freeradius/eap.conf
including configuration file /etc/freeradius/policy.conf
including files in directory /etc/freeradius/sites-enabled/
including configuration file /etc/freeradius/sites-enabled/default
including configuration file /etc/freeradius/sites-enabled/inner-tunnel
including configuration file /etc/freeradius/sites-enabled/dhcp
main {
user = "freerad"
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 = yes
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 ####
proxy server {
retry_delay = 5
retry_count = 3
default_fallback = no
dead_time = 120
wake_all_if_all_dead = no
}
home_server localhost {
ipaddr = 127.0.0.1
port = 1812
type = "auth"
secret = "testing123"
response_window = 20
max_outstanding = 65536
require_message_authenticator = yes
zombie_period = 40
status_check = "status-server"
ping_interval = 30
check_interval = 30
num_answers_to_alive = 3
num_pings_to_alive = 3
revive_interval = 120
status_check_timeout = 4
coa {
irt = 2
mrt = 16
mrc = 5
mrd = 30
}
}
home_server_pool my_auth_failover {
type = fail-over
home_server = localhost
}
realm example.com {
auth_pool = my_auth_failover
}
realm LOCAL {
}
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/modules/exec
exec {
wait = no
input_pairs = "request"
shell_escape = yes
}
Module: Linked to module rlm_expr
Module: Instantiating module "expr" from file /etc/freeradius/modules/expr
Module: Linked to module rlm_expiration
Module: Instantiating module "expiration" from file
/etc/freeradius/modules/expiration
expiration {
reply-message = "Password Has Expired "
}
Module: Linked to module rlm_logintime
Module: Instantiating module "logintime" from file
/etc/freeradius/modules/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/modules/pap
pap {
encryption_scheme = "auto"
auto_header = no
}
Module: Linked to module rlm_chap
Module: Instantiating module "chap" from file /etc/freeradius/modules/chap
Module: Linked to module rlm_mschap
Module: Instantiating module "mschap" from file /etc/freeradius/modules/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/modules/digest
Module: Linked to module rlm_unix
Module: Instantiating module "unix" from file /etc/freeradius/modules/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/"
}
}
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/modules/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
}
Module: Linked to module rlm_realm
Module: Instantiating module "suffix" from file /etc/freeradius/modules/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/modules/files
files {
usersfile = "/etc/freeradius/users"
acctusersfile = "/etc/freeradius/acct_users"
preproxy_usersfile = "/etc/freeradius/preproxy_users"
compat = "no"
}
Module: Checking preacct {...} for more modules to load
Module: Linked to module rlm_acct_unique
Module: Instantiating module "acct_unique" from file
/etc/freeradius/modules/acct_unique
acct_unique {
key = "User-Name, Acct-Session-Id, NAS-IP-Address, Client-IP-Address, NAS-Port"
}
Module: Checking accounting {...} for more modules to load
Module: Linked to module rlm_detail
Module: Instantiating module "detail" from file /etc/freeradius/modules/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_radutmp
Module: Instantiating module "radutmp" from file
/etc/freeradius/modules/radutmp
radutmp {
filename = "/var/log/freeradius/radutmp"
username = "%{User-Name}"
case_sensitive = yes
check_with_nas = yes
perm = 384
callerid = yes
}
Module: Linked to module rlm_attr_filter
Module: Instantiating module "attr_filter.accounting_response" from
file /etc/freeradius/modules/attr_filter
attr_filter attr_filter.accounting_response {
attrsfile = "/etc/freeradius/attrs.accounting_response"
key = "%{User-Name}"
relaxed = no
}
Module: Checking session {...} for more modules to load
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/modules/attr_filter
attr_filter attr_filter.access_reject {
attrsfile = "/etc/freeradius/attrs.access_reject"
key = "%{User-Name}"
relaxed = no
}
} # modules
} # server
server inner-tunnel { # from file /etc/freeradius/sites-enabled/inner-tunnel
modules {
Module: Checking authenticate {...} for more modules to load
Module: Checking authorize {...} for more modules to load
Module: Checking session {...} for more modules to load
Module: Checking post-proxy {...} for more modules to load
Module: Checking post-auth {...} for more modules to load
} # modules
} # server
server dhcp { # from file /etc/freeradius/sites-enabled/dhcp
modules {
Module: Checking dhcp DHCP-Discover {...} for more modules to load
Module: Linked to module rlm_passwd
Module: Instantiating module "mac2ip" from file /etc/freeradius/modules/mac2ip
passwd mac2ip {
filename = "/etc/freeradius/mac2ip"
format = "*DHCP-Client-Hardware-Address:=DHCP-Your-IP-Address"
delimiter = ","
ignorenislike = yes
ignoreempty = yes
allowmultiplekeys = no
hashsize = 100
}
rlm_passwd: nfields: 2 keyfield 0(DHCP-Client-Hardware-Address) listable: no
Module: Linked to module rlm_always
Module: Instantiating module "ok" from file /etc/freeradius/modules/always
always ok {
rcode = "ok"
simulcount = 0
mpp = no
}
Module: Checking dhcp DHCP-Request {...} for more modules to load
Module: Checking dhcp (null) {...} for more modules to load
/etc/freeradius/sites-enabled/dhcp[237]: No name specified for
Post-Auth-Type block
} # modules
} # server
radiusd: #### Opening IP addresses and Ports ####
listen {
type = "auth"
ipaddr = *
port = 0
}
listen {
type = "acct"
ipaddr = *
port = 0
}
listen {
type = "auth"
ipaddr = 127.0.0.1
port = 18120
}
listen {
type = "dhcp"
ipaddr = 255.255.255.255
port = 67
interface_ipaddr = 172.16.101.1
}
listen {
type = "dhcp"
ipaddr = 172.16.101.1
port = 67
}
... adding new socket proxy address * port 49208
Listening on authentication address * port 1812
Listening on accounting address * port 1813
Listening on authentication address 127.0.0.1 port 18120 as server inner-tunnel
Listening on dhcp interface dummy1 address 255.255.255.255 port 67 as
server dhcp
Listening on dhcp address 172.16.101.1 port 67 as server dhcp
Listening on proxy address * port 1814
Ready to process requests.
Received DHCP-Discover of id 3ecf5c31 from 0.0.0.0:68 to 255.255.255.255:67
DHCP-Opcode = Client-Message
DHCP-Hardware-Type = Ethernet
DHCP-Hardware-Address-Length = 6
DHCP-Hop-Count = 0
DHCP-Transaction-Id = 1053776945
DHCP-Number-of-Seconds = 0
DHCP-Flags = 0
DHCP-Client-IP-Address = 0.0.0.0
DHCP-Your-IP-Address = 0.0.0.0
DHCP-Server-IP-Address = 0.0.0.0
DHCP-Gateway-IP-Address = 0.0.0.0
DHCP-Client-Hardware-Address = 08:00:27:a2:13:b9
DHCP-Message-Type = DHCP-Discover
DHCP-Parameter-Request-List = DHCP-Subnet-Mask
DHCP-Parameter-Request-List = DHCP-Broadcast-Address
DHCP-Parameter-Request-List = DHCP-Time-Offset
DHCP-Parameter-Request-List = DHCP-Router-Address
DHCP-Parameter-Request-List = DHCP-Domain-Name
DHCP-Parameter-Request-List = DHCP-Domain-Name-Server
DHCP-Parameter-Request-List = DHCP-Hostname
DHCP-Parameter-Request-List = DHCP-NTP-Servers
server dhcp {
Trying sub-section dhcp DHCP-Discover {...}
+- entering group DHCP-Discover {...}
++[reply] returns noop
++[reply] returns noop
[mac2ip] Added DHCP-Your-IP-Address: '172.16.101.101' to reply_items
++[mac2ip] returns ok
++[ok] returns ok
} # server dhcp
DHCP-Subnet-Mask = 255.255.255.0
DHCP-Router-Address = 172.16.101.1
DHCP-Domain-Name-Server = 8.8.8.8
DHCP-IP-Address-Lease-Time = 60
DHCP-DHCP-Server-Identifier = 172.16.101.1
Sending DHCP-Offer of id 3ecf5c31 from 172.16.101.1:67 to 172.16.101.101:68
Finished request 0.
Cleaning up request 0 ID 1053776945 with timestamp +12
Going to the next request
Ready to process requests.
Received DHCP-Discover of id 3ecf5c31 from 0.0.0.0:68 to 255.255.255.255:67
DHCP-Opcode = Client-Message
DHCP-Hardware-Type = Ethernet
DHCP-Hardware-Address-Length = 6
DHCP-Hop-Count = 0
DHCP-Transaction-Id = 1053776945
DHCP-Number-of-Seconds = 4
DHCP-Flags = 0
DHCP-Client-IP-Address = 0.0.0.0
DHCP-Your-IP-Address = 0.0.0.0
DHCP-Server-IP-Address = 0.0.0.0
DHCP-Gateway-IP-Address = 0.0.0.0
DHCP-Client-Hardware-Address = 08:00:27:a2:13:b9
DHCP-Message-Type = DHCP-Discover
DHCP-Parameter-Request-List = DHCP-Subnet-Mask
DHCP-Parameter-Request-List = DHCP-Broadcast-Address
DHCP-Parameter-Request-List = DHCP-Time-Offset
DHCP-Parameter-Request-List = DHCP-Router-Address
DHCP-Parameter-Request-List = DHCP-Domain-Name
DHCP-Parameter-Request-List = DHCP-Domain-Name-Server
DHCP-Parameter-Request-List = DHCP-Hostname
DHCP-Parameter-Request-List = DHCP-NTP-Servers
server dhcp {
Trying sub-section dhcp DHCP-Discover {...}
+- entering group DHCP-Discover {...}
++[reply] returns noop
++[reply] returns noop
[mac2ip] Added DHCP-Your-IP-Address: '172.16.101.101' to reply_items
++[mac2ip] returns ok
++[ok] returns ok
} # server dhcp
DHCP-Subnet-Mask = 255.255.255.0
DHCP-Router-Address = 172.16.101.1
DHCP-Domain-Name-Server = 8.8.8.8
DHCP-IP-Address-Lease-Time = 60
DHCP-DHCP-Server-Identifier = 172.16.101.1
Sending DHCP-Offer of id 3ecf5c31 from 172.16.101.1:67 to 172.16.101.101:68
Finished request 1.
Cleaning up request 1 ID 1053776945 with timestamp +16
Going to the next request
Ready to process requests.
#===========================================================================
tcpdump output from the server
#===========================================================================
15:39:47.611809 IP (tos 0x10, ttl 128, id 0, offset 0, flags [none],
proto UDP (17), length 328)
0.0.0.0.68 > 255.255.255.255.67: BOOTP/DHCP, Request from
08:00:27:a2:13:b9, length 300, xid 0x3ecf5c31, Flags [none]
Client-Ethernet-Address 08:00:27:a2:13:b9
Vendor-rfc1048 Extensions
Magic Cookie 0x63825363
DHCP-Message Option 53, length 1: Discover
Parameter-Request Option 55, length 8:
Subnet-Mask, BR, Time-Zone, Default-Gateway
Domain-Name, Domain-Name-Server, Hostname, NTP
15:39:47.611830 IP (tos 0x10, ttl 128, id 0, offset 0, flags [none],
proto UDP (17), length 328)
0.0.0.0.68 > 255.255.255.255.67: BOOTP/DHCP, Request from
08:00:27:a2:13:b9, length 300, xid 0x3ecf5c31, Flags [none]
Client-Ethernet-Address 08:00:27:a2:13:b9
Vendor-rfc1048 Extensions
Magic Cookie 0x63825363
DHCP-Message Option 53, length 1: Discover
Parameter-Request Option 55, length 8:
Subnet-Mask, BR, Time-Zone, Default-Gateway
Domain-Name, Domain-Name-Server, Hostname, NTP
15:39:47.616432 ARP, Ethernet (len 6), IPv4 (len 4), Request who-has
172.16.101.101 tell 172.16.101.1, length 28
15:39:48.616525 ARP, Ethernet (len 6), IPv4 (len 4), Request who-has
172.16.101.101 tell 172.16.101.1, length 28
15:39:49.616483 ARP, Ethernet (len 6), IPv4 (len 4), Request who-has
172.16.101.101 tell 172.16.101.1, length 28
15:39:51.613941 IP (tos 0x10, ttl 128, id 0, offset 0, flags [none],
proto UDP (17), length 328)
0.0.0.0.68 > 255.255.255.255.67: BOOTP/DHCP, Request from
08:00:27:a2:13:b9, length 300, xid 0x3ecf5c31, secs 4, Flags [none]
Client-Ethernet-Address 08:00:27:a2:13:b9
Vendor-rfc1048 Extensions
Magic Cookie 0x63825363
DHCP-Message Option 53, length 1: Discover
Parameter-Request Option 55, length 8:
Subnet-Mask, BR, Time-Zone, Default-Gateway
Domain-Name, Domain-Name-Server, Hostname, NTP
15:39:51.613964 IP (tos 0x10, ttl 128, id 0, offset 0, flags [none],
proto UDP (17), length 328)
0.0.0.0.68 > 255.255.255.255.67: BOOTP/DHCP, Request from
08:00:27:a2:13:b9, length 300, xid 0x3ecf5c31, secs 4, Flags [none]
Client-Ethernet-Address 08:00:27:a2:13:b9
Vendor-rfc1048 Extensions
Magic Cookie 0x63825363
DHCP-Message Option 53, length 1: Discover
Parameter-Request Option 55, length 8:
Subnet-Mask, BR, Time-Zone, Default-Gateway
Domain-Name, Domain-Name-Server, Hostname, NTP
15:39:51.616438 ARP, Ethernet (len 6), IPv4 (len 4), Request who-has
172.16.101.101 tell 172.16.101.1, length 28
15:39:52.616460 ARP, Ethernet (len 6), IPv4 (len 4), Request who-has
172.16.101.101 tell 172.16.101.1, length 28
15:39:53.616516 ARP, Ethernet (len 6), IPv4 (len 4), Request who-has
172.16.101.101 tell 172.16.101.1, length 28
#===========================================================================
--
Fajar
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