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Tautuhinga whatunga mai i FreeRadius ma DHCP

Tautuhinga whatunga mai i FreeRadius ma DHCP
I tae mai te mahi ki te whakarite i te tuku wahitau IP ki nga kaiohauru. Nga tikanga o te raru:

  • E kore matou e hoatu ki a koe he tūmau motuhake mo te whakamana - maau koe e mahi 😉
  • Me whiwhi nga kaiohauru i nga tautuhinga whatunga ma te DHCP
  • He rereke te whatunga. Kei roto i tenei ko nga taputapu PON me nga huringa auau me te Kōwhiringa 82 kua whirihorahia me nga turanga WiFi me nga hotspots
  • Mena kaore nga raraunga e taka ki raro i tetahi o nga tikanga mo te tuku IP, me whakaputa e koe he IP mai i te whatunga "manuhiri"

I te taha pai: kei reira tonu he tūmau i runga i FreeBSD ka taea te "mahi", engari he "tawhiti" ;), ehara i te "tika i runga i tenei whatunga".

He taputapu whakamiharo ano hoki ko Mikrotik. He penei te hoahoa whatunga whanui:

Tautuhinga whatunga mai i FreeRadius ma DHCP

I muri i etahi whakaaro, i whakatauhia ki te whakamahi i FreeRadius ki te tuku i nga tautuhinga whatunga ki nga kaiohauru. Ko te tikanga, he rite tonu te kaupapa: ka taea e matou te tūmau DHCP i runga i te Microtick, me te Kiritaki Radius kei runga. Ka whirihorahia e matou te DHCP server -> Radius Client -> Radius server connection.

Karekau he uaua. Engari! Ko te rewera kei roto i nga korero. Ara:

  • I te wa e whakamanahia ana he PON OLT ma te whakamahi i tenei kaupapa, ka tukuna he tono ki a FreeRadius me te Ingoa-kaiwhakamahi e rite ana ki te wahitau MAC o te upoko, he Agent-Circuit-Id e rite ana ki te MAC PON Onu me te kupuhipa kau.
  • I te wa e whakamanahia ana mai i nga huringa me te whiringa 82, ka whiwhi tono a FreeRadius me tetahi Ingoa-Kaiwhakamahi kau e rite ana ki te MAC o te taputapu a te kaiohauru, ka whakakiia ki etahi atu huanga Agent-Circuit-Id me Agent-Remote-Id kei roto, ano, ano te MAC o te whakawhiti rei me te tauranga e hono ana te kaiohauru.
  • Ko etahi o nga kaiohauru whai tohu WiFI ka whakamanahia ma nga tikanga PAP-CHAP
  • Ko etahi o nga kaiohauru mai i nga tohu WIFI kua whakamanahia me te Ingoa-kaiwhakamahi e rite ana ki te wahitau MAC o te tohu WIFI, kaore he kupuhipa.

Papamuri o mua: he aha te "Kōwhiringa 82" i te DHCP

He whiringa taapiri enei mo te kawa DHCP e taea ai e koe te whakawhiti korero taapiri, hei tauira i roto i nga mara Agent-Circuit-Id me Agent-Remote-Id. I te nuinga o te wa ka whakamahia ki te tuku i te wahitau MAC o te whakawhiti relay me te tauranga e hono ana te kaiohauru. I roto i nga taputapu PON me nga teihana turanga WIFI, kaore he korero whai hua i roto i te mara Agent-Circuit-Id (kaore he tauranga kaiohauru). Ko te kaupapa whanui mo te mahi DHCP i tenei keehi ko enei e whai ake nei:

Tautuhinga whatunga mai i FreeRadius ma DHCP

Ma te taahiraa e mahi ana tenei kaupapa penei:

  1. Ka tukuna e nga taputapu kaiwhakamahi he tono haapurororaa DHCP kia whiwhi tautuhinga whatunga
  2. Ko te taputapu (hei tauira, he whakawhiti, WiFi, teihana turanga PON ranei) e hono tika ana te taputapu kaiohauru "ka haukotia" tenei kete ka huri, ka whakauru i etahi atu whiringa Kōwhiringa 82 me te Relay agent IP address ki roto, ka tuku atu ki runga. te whatunga.
  3. Ka whakaae te tūmau DHCP i te tono, ka whakaputa i te whakautu me te tuku ki te taputapu kawe
  4. Ka tukuna e te taputapu rei te paakete whakautu ki te taputapu kaiohauru

Ae ra, kaore e mahi ngawari katoa; me whirihora e koe o taputapu whatunga kia rite.

Tāuta FreeRadius

Ko te tikanga, ka taea tenei ma nga tautuhinga whirihoranga FreeRadius, engari he uaua, he maamaa ... ina koa ka haere koe ki reira i muri i nga marama N me "ka mahi nga mea katoa." Na reira, i whakatau matou ki te tuhi i a maatau ake waahanga whakamana mo FreeRadius i Python. Ka tangohia e matou nga raraunga whakamanatanga mai i te paataka raraunga MySQL. Kaore he take ki te whakaahua i tona hanganga; ahakoa, ka mahia e te katoa "mo ratou ano." Ina koa, i tangohia e ahau te hanganga e tukuna ana me te sql module mo FreeRadius, me te whakarereke paku ma te taapiri i te mac me te waahi tauranga mo ia kaiohauru, hei taapiri mo te takiuru-kupuhipa.

Na, tuatahi, whakauruhia FreeRadius:

cd /usr/ports/net/freeradius3
make config
make
install clean

I roto i nga tautuhinga, tohua ki te whakauru:

Tautuhinga whatunga mai i FreeRadius ma DHCP

Hangaia he hononga hono ki te kōwae python (arā, "whakakā"):

ln -s /usr/local/etc/raddb/mods-available/python /usr/local/etc/raddb/mods-enabled

Kia whakauruhia he waahanga taapiri mo te python:

pip install mysql-connector

I roto i nga tautuhinga kōwae python mo FreeRadius, me tohu e koe nga ara rapunga kōwae i roto i te taurangi python_path. Hei tauira kei a au tenei:

python_path="/usr/local/etc/raddb/mods-config/python:/usr/local/lib/python2.7:/usr/local/lib/python27.zip:/usr/local/lib/python2.7:/usr/local/lib/python2.7/plat-freebsd12:/usr/local/lib/python2.7/lib-tk:/usr/local/lib/python2.7/lib-old:/usr/local/lib/python2.7/lib-dynload:/usr/local/lib/python2.7/site-packages"

Ka kitea e koe nga huarahi ma te whakarewa i te kaiwhakamaori python me te whakauru i nga whakahau:

root@phaeton:/usr/local/etc/raddb/mods-enabled# python
Python 2.7.15 (default, Dec  8 2018, 01:22:25) 
[GCC 4.2.1 Compatible FreeBSD Clang 6.0.1 (tags/RELEASE_601/final 335540)] on freebsd12
Type "help", "copyright", "credits" or "license" for more information.
>>> import sys
>>> sys.path
['', '/usr/local/lib/python27.zip', '/usr/local/lib/python2.7', '/usr/local/lib/python2.7/plat-freebsd12', '/usr/local/lib/python2.7/lib-tk', '/usr/local/lib/python2.7/lib-old', '/usr/local/lib/python2.7/lib-dynload', '/usr/local/lib/python2.7/site-packages']
>

Ki te kore koe e whai i tenei taahiraa, karekau nga tuhinga kua tuhia ki te python me te whakarewahia e FreeRadius e kore e kitea nga waahanga kua tohua ki te kawemai. I tua atu, me whakakore koe i nga mahi mo te karanga i te whakamanatanga me te kaute i roto i nga tautuhinga kōwae. Hei tauira, penei te ahua o tenei waahanga:

python {
    python_path="/usr/local/etc/raddb/mods-config/python:/usr/local/lib/python2.7:/usr/local/lib/python2.7/site-packages:/usr/local/lib/python27.zip:/usr/local/lib/python2.7:/usr/local/lib/python2.7/plat-freebsd12:/usr/local/lib/python2.7/lib-tk:/usr/local/lib/python2.7/lib-old:/usr/local/lib/python2.7/lib-dynload:/usr/local/lib/python2.7/site-packages"
    module = work
    mod_instantiate = ${.module}
    mod_detach = ${.module}

    mod_authorize = ${.module}
    func_authorize = authorize

    mod_authenticate = ${.module}
    func_authenticate = authenticate

    mod_preacct = ${.module}
    func_preacct = preacct

    mod_accounting = ${.module}
    func_accounting = accounting

    mod_checksimul = ${.module}
    mod_pre_proxy = ${.module}
    mod_post_proxy = ${.module}
    mod_post_auth = ${.module}
    mod_recv_coa = ${.module}
    mod_send_coa = ${.module}

}

Ko te tuhinga work.py (me era atu katoa) me whakauru ki /usr/local/etc/raddb/mods-config/python E toru aku tuhinga katoa.

mahi.py:

#!/usr/local/bin/python
# coding=utf-8
import radiusd
import func
import sys
from pprint import pprint
mysql_host="localhost"
mysql_username="укацук"
mysql_password="ыукаыукаыук"
mysql_base="ыукаыкуаыу"
def instantiate(p):
print ("*** instantiate ***")
print (p)
# return 0 for success or -1 for failure
def authenticate(p):
print ("*** Аутенфикация!!***")
print (p)
def authorize(p):
radiusd.radlog(radiusd.L_INFO, '*** radlog call in authorize ***')    
conn=func.GetConnectionMysql(mysql_host, mysql_username, mysql_password, mysql_base);
param=func.ConvertArrayToNames(p);
pprint(param)
print ("*** Авторизация ***")
reply = ()
conf = ()
cnt=0
username="";mac="";
# сначала проверяем "как положено", по связке логин/пароль
if ("User-Name" in param) and ("User-Password" in param) :
print ("Вариант авторизации (1): есть логин-пароль")
pprint(param["User-Name"])
pprint(param["User-Password"])
pprint(conn)
print(sys.version_info)
print (radiusd.config)
sql="select radreply.attribute,radreply.value from radcheck inner join radreply on radreply.username=radcheck.username where radcheck.username=%s and radcheck.value=%s"
print(sql)
cursor = conn.cursor(dictionary=True,buffered=True)
cursor.execute(sql,[param["User-Name"], param["User-Password"]]);
row = cursor.fetchone()	
while row is not None:    
cnt=cnt+1
username=row["username"]
reply = reply+((str(row["attribute"]),str(row["value"])), )
row = cursor.fetchone()	          
# вариант, что User-Name - это МАС адрес БС,пароля и порта нет                
if ("User-Name" in param)  and ("User-Password" in param) and (cnt==0):
if param["User-Password"] =='':
if ":" in param["User-Name"]:
pprint(param["User-Name"])            
print ("Вариант авторизации (2): User-Name - это MAC адрес базовой станции, порта и пароля нет")
sql="select radreply.username,radreply.attribute,radreply.value from radcheck inner join radreply on radreply.username=radcheck.username where REPLACE(radcheck.mac,':','') = REPLACE(REPLACE('"+str(param["User-Name"])+"','0x',''),':','') and radcheck.sw_port=''"
print (sql)
cursor = conn.cursor(dictionary=True,buffered=True)
cursor.execute(sql);
row = cursor.fetchone()	
while row is not None:                  
cnt=cnt+1
username=row["username"]
mac=param["User-Name"]
reply = reply+((str(row["attribute"]),str(row["value"])), )
row = cursor.fetchone()	          
if ("Agent-Remote-Id" in param)  and ("User-Password" in param) and (cnt==0):
if param["User-Password"] =='':
pprint(param["Agent-Remote-Id"])            
print ("Вариант авторизации (2.5): Agent-Remote-Id - это MAC адрес PON оборудования")
sql="select radreply.username,radreply.attribute,radreply.value from radcheck inner join radreply on radreply.username=radcheck.username where REPLACE(radcheck.mac,':','') = REPLACE(REPLACE('"+str(param["Agent-Remote-Id"])+"','0x',''),':','') and radcheck.sw_port=''"
print (sql)
cursor = conn.cursor(dictionary=True,buffered=True)
cursor.execute(sql);
row = cursor.fetchone()	
while row is not None:                  
cnt=cnt+1
username=row["username"]
mac=param["User-Name"]
reply = reply+((str(row["attribute"]),str(row["value"])), )
row = cursor.fetchone()	          
#Вариант, что Agent-Remote-Id - это МАС адрес БС,пароля и порта нет и предыдущие варианты поиска IP результата не дали                
if ("Agent-Remote-Id" in param)  and ("User-Password" not in param) and (cnt==0):
pprint(param["Agent-Remote-Id"])            
print ("Вариант авторизации (3): Agent-Remote-Id - МАС базовой станции/пон. Порта в биллинге нет")
sql="select radreply.username,radreply.attribute,radreply.value from radcheck inner join radreply on radreply.username=radcheck.username where REPLACE(radcheck.mac,':','') = REPLACE(REPLACE('"+str(param["Agent-Remote-Id"])+"','0x',''),':','') and radcheck.sw_port=''"
print(sql)
cursor = conn.cursor(dictionary=True,buffered=True)
cursor.execute(sql);
row = cursor.fetchone()	
while row is not None:    
cnt=cnt+1
mac=param["Agent-Remote-Id"]
username=row["username"]
reply = reply+((str(row["attribute"]),str(row["value"])), )
row = cursor.fetchone()	          
#Вариант, что предыдущие попытки результата не дали, но есть Agent-Remote-Id и Agent-Circuit-Id
if ("Agent-Remote-Id" in param)  and ("Agent-Circuit-Id" in param) and (cnt==0):
pprint(param["Agent-Remote-Id"])            
pprint(param["Agent-Circuit-Id"])            
print ("Вариант авторизации (4): авторизация по Agent-Remote-Id и Agent-Circuit-Id, в биллинге есть порт/мак")
sql="select radreply.username,radreply.attribute,radreply.value from radcheck inner join radreply on radreply.username=radcheck.username where upper(radcheck.sw_mac)=upper(REPLACE('"+str(param["Agent-Remote-Id"])+"','0x','')) and upper(radcheck.sw_port)=upper(RIGHT('"+str(param["Agent-Circuit-Id"])+"',2)) and radcheck.sw_port<>''"
print(sql)
cursor = conn.cursor(dictionary=True,buffered=True)
cursor.execute(sql);
row = cursor.fetchone()	
while row is not None:    
cnt=cnt+1
mac=param["Agent-Remote-Id"]
username=row["username"]
reply = reply+((str(row["attribute"]),str(row["value"])), )
row = cursor.fetchone()	          
# если так до сих пор IP не получен, то выдаю иего из гостевой сети..
if cnt==0:      
print ("Ни один из вариантов авторизации не сработал, получаю IP из гостевой сети..")
ip=func.GetGuestNet(conn)      
if ip!="": 
cnt=cnt+1;
reply = reply+(("Framed-IP-Address",str(ip)), )
# если совсем всё плохо, то Reject
if cnt==0:
conf = ( ("Auth-Type", "Reject"), ) 
else:
#если авторизация успешная (есть такой абонент), то запишем историю авторизации
if username!="":
func.InsertToHistory(conn,username,mac, reply);
conf = ( ("Auth-Type", "Accept"), )             
pprint (reply)
conn=None;
return radiusd.RLM_MODULE_OK, reply, conf
def preacct(p):
print ("*** preacct ***")
print (p)
return radiusd.RLM_MODULE_OK
def accounting(p):
print ("*** Аккаунтинг ***")
radiusd.radlog(radiusd.L_INFO, '*** radlog call in accounting (0) ***')  
print (p)
conn=func.GetConnectionMysql(mysql_host, mysql_username, mysql_password, mysql_base);
param=func.ConvertArrayToNames(p);
pprint(param)  
print("Удалим старые сессии (более 20 минут нет аккаунтинга)");
sql="delete from radacct where TIMESTAMPDIFF(minute,acctupdatetime,now())>20"
cursor = conn.cursor(dictionary=True,buffered=True)
cursor.execute(sql);
conn.commit()
print("Обновим/добавим информацию о сессии")
if (("Acct-Unique-Session-Id" in param) and ("User-Name" in param) and ("Framed-IP-Address" in param)):
sql='insert into radacct (radacctid,acctuniqueid,username,framedipaddress,acctstarttime) values (null,"'+str(param['Acct-Unique-Session-Id'])+'","'+str(param['User-Name'])+'","'+str(param['Framed-IP-Address'])+'",now()) ON DUPLICATE KEY update acctupdatetime=now()'
print(sql)
cursor = conn.cursor(dictionary=True,buffered=True)
cursor.execute(sql)
conn.commit()
conn=None;
return radiusd.RLM_MODULE_OK
def pre_proxy(p):
print ("*** pre_proxy ***")
print (p)
return radiusd.RLM_MODULE_OK
def post_proxy(p):
print ("*** post_proxy ***")
print (p)
return radiusd.RLM_MODULE_OK
def post_auth(p):
print ("*** post_auth ***")
print (p)
return radiusd.RLM_MODULE_OK
def recv_coa(p):
print ("*** recv_coa ***")
print (p)
return radiusd.RLM_MODULE_OK
def send_coa(p):
print ("*** send_coa ***")
print (p)
return radiusd.RLM_MODULE_OK
def detach():
print ("*** На этом всё детишечки ***")
return radiusd.RLM_MODULE_OK

func.py:

#!/usr/bin/python2.7
# coding=utf-8
import mysql.connector
from mysql.connector import Error
# Функция возвращает соединение с MySQL
def GetConnectionMysql(mysql_host, mysql_username, mysql_password, mysql_base):    
try:
conn = mysql.connector.connect(host=mysql_host,database=mysql_base,user=mysql_username,password=mysql_password)
if conn.is_connected(): print('---cоединение с БД '+mysql_base+' установлено')
except Error as e:
print("Ошибка: ",e);
exit(1);       
return conn
def ConvertArrayToNames(p):
mass={};
for z in p:
mass[z[0]]=z[1]
return mass
# Функция записывает историю соединения по известным данным
def InsertToHistory(conn,username,mac, reply):
print("--записываю для истории")
repl=ConvertArrayToNames(reply)
if "Framed-IP-Address" in repl:
sql='insert into radpostauth (username,reply,authdate,ip,mac,session_id,comment) values ("'+username+'","Access-Accept",now(),"'+str(repl["Framed-IP-Address"])+'","'+str(mac)+'","","")'
print(sql)
cursor = conn.cursor(dictionary=True,buffered=True)          
cursor.execute(sql);
conn.commit()
# Функция выдает последний по дате выдачи IP адрес из гостевой сети        
def GetGuestNet(conn):
ip="";id=0
sql="select * from guestnet order by dt limit 1"
print (sql)
cursor = conn.cursor(dictionary=True,buffered=True)          
cursor.execute(sql);
row = cursor.fetchone()	
while row is not None:    
ip=row["ip"]
id=row["id"]
row = cursor.fetchone()	          
if id>0:
sql="update guestnet set dt=now() where id="+str(id)
print (sql)
cursor = conn.cursor(dictionary=True,buffered=True)          
cursor.execute(sql);
conn.commit()
return ip

radiusd.py:

#!/usr/bin/python2.7
# coding=utf-8
# from modules.h
RLM_MODULE_REJECT = 0
RLM_MODULE_FAIL = 1
RLM_MODULE_OK = 2
RLM_MODULE_HANDLED = 3
RLM_MODULE_INVALID = 4
RLM_MODULE_USERLOCK = 5
RLM_MODULE_NOTFOUND = 6
RLM_MODULE_NOOP = 7
RLM_MODULE_UPDATED = 8
RLM_MODULE_NUMCODES = 9
# from log.h
L_AUTH = 2
L_INFO = 3
L_ERR = 4
L_WARN = 5
L_PROXY = 6
L_ACCT = 7
L_DBG = 16
L_DBG_WARN = 17
L_DBG_ERR = 18
L_DBG_WARN_REQ = 19
L_DBG_ERR_REQ = 20
# log function
def radlog(level, msg):
import sys
sys.stdout.write(msg + 'n')
level = level

Ka kitea e koe mai i te waehere, kei te ngana matou ki te tautuhi i te kaiohauru ma te whakamahi i nga tikanga katoa e waatea ana e ana kaitango rongonui nga wahitau MAC kaitango ranei te Kōwhiringa 82, a ki te kore e mahi, katahi ka tukuna e matou te wahitau IP tawhito kua whakamahia mai i te "manuhiri. ” whatunga. Ko nga mea katoa e toe ana ko te whirihora i te tuhinga taunoa i roto i te kopaki pae-whakahohea, kia korikori ai nga mahi e tika ana mai i te tuhinga python i nga waa kua tohua. Inaa, he nui noa te kawe i te konae ki te puka:

Taunoa

server default {
listen {
type = auth
ipaddr = *
port = 0
limit {
max_connections = 16
lifetime = 0
idle_timeout = 30
}
}
listen {
ipaddr = *
port = 0
type = acct
limit {
}
}
listen {
type = auth
port = 0
limit {
max_connections = 1600
lifetime = 0
idle_timeout = 30
}
}
listen {
ipv6addr = ::
port = 0
type = acct
limit {
}
}
authorize {
python
filter_username
preprocess
expiration
logintime
}
authenticate {
Auth-Type PAP {
pap
python
}
Auth-Type CHAP {
chap
python
}
Auth-Type MS-CHAP {
mschap
python
}
eap
}
preacct {
preprocess
acct_unique
suffix
files
}
accounting {
python
exec
attr_filter.accounting_response
}
session {
}
post-auth {
update {
&reply: += &session-state:
}
exec
remove_reply_message_if_eap
Post-Auth-Type REJECT {
attr_filter.access_reject
eap
remove_reply_message_if_eap
}
Post-Auth-Type Challenge {
}
}
pre-proxy {
}
post-proxy {
eap
}
}

Me ngana ki te whakahaere me te kite he aha nga mea ka uru mai ki te raarangi patuiro:

/usr/local/etc/rc.d/radiusd debug

He aha atu. I te wa e whakarite ana i a FreeRadius, he pai ki te whakamatau i tana mahi ma te whakamahi i te taputapu radclient. Hei tauira whakamanatanga:

echo "User-Name=4C:5E:0C:2E:7F:15,Agent-Remote-Id=0x9845623a8c98,Agent-Circuit-Id=0x00010006" | radclient -x  127.0.0.1:1812 auth testing123

Pūkete ranei:

echo "User-Name=4C:5E:0C:2E:7F:15,Agent-Remote-Id=0x00030f26054a,Agent-Circuit-Id=0x00010002" | radclient -x  127.0.0.1:1813 acct testing123

Kei te hiahia ahau ki te whakatupato ia koe kaore e taea te whakamahi i taua kaupapa me nga tuhinga "kaore he huringa" i runga i te tauine "ahumahi". I te iti rawa ka kitea:

  • ka taea ki te "rūpahu" te wahitau MAC. He nui mo te kaiohauru ki te rehita MAC o tetahi atu ka raru
  • te arorau o te tuku whatunga manuhiri kei tua atu i te whakahee. Karekau he haki "kei kona ano pea nga kaihoko me te wahitau IP kotahi?"

He "whakaoti pihikete-tapahi" noa tenei i hangaia hei mahi motuhake i roto i aku ahuatanga, kaore he mea ke atu. Kaua e tino whakawa 😉

Source: will.com

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