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Iisetingi zenethiwekhi ukusuka kwiFreeRadius ngeDHCP

Iisetingi zenethiwekhi ukusuka kwiFreeRadius ngeDHCP
Umsebenzi ufikile ukulungiselela ukukhutshwa kweedilesi ze-IP kubabhalisi. Iimeko zengxaki:

  • Asiyi kukunika iseva eyahlukileyo yogunyaziso- uya kuyenza 😉
  • Ababhalisi kufuneka bafumane useto lwenethiwekhi ngeDHCP
  • Inethiwekhi iyahluka. Oku kubandakanya izixhobo ze-PON kunye nokutshintsha rhoqo ngoKhetho olumiselweyo lwe-82 kunye neziseko ze-WiFi ezineendawo ezishushu.
  • Ukuba idatha ayiwa phantsi kwayo nayiphi na imiqathango yokukhupha i-IP, kufuneka ukhuphe i-IP kwinethiwekhi "yendwendwe"

Kwicala elihle: kusekho iseva kwi-FreeBSD enokuthi "isebenze", kodwa "ikude";), kungekhona "ekunene kule nethiwekhi".

Kukwakho isixhobo esimangalisayo esibizwa ngokuba yiMikrotik. Umzobo wothungelwano jikelele yinto enje:

Iisetingi zenethiwekhi ukusuka kwiFreeRadius ngeDHCP

Emva kwengcinga ethile, kwagqitywa ekubeni kusetyenziswe iFreeRadius ukukhupha useto lwenethiwekhi kubabhalisi. Ngokomgaqo, iskimu siqhelekileyo: senza iseva ye-DHCP kwi-Microtick, kunye ne-Radius Client kuyo. Siqwalasela iseva ye-DHCP -> Umxhasi weRadius -> Uqhagamshelwano lwe-server ye-Radius.

Akubonakali kunzima. Kodwa! Umtyholi ukwiinkcukacha. Oko kukuthi:

  • Xa ugunyazisa i-PON OLT usebenzisa le nkqubo, isicelo sithunyelwa kwi-FreeRadius kunye ne-User-Name elingana nedilesi ye-MAC ye-headend, i-Agent-Circuit-Id elingana ne-MAC PON Onu kunye negama lokugqitha elingenanto.
  • Xa ugunyazisa ukutshintshwa ngokhetho lwe-82, i-FreeRadius ifumana isicelo esinegama lomsebenzisi elingenanto elilingana ne-MAC yesixhobo sombhalisi kwaye izaliswe ngeempawu ezongezelelweyo I-Agent-Circuit-Id kunye ne-Agent-Remote-Id equlethe, ngokulandelelana, kwakhona i-MAC ye iswitshi yokudlulisa kunye nezibuko apho umrhumi adityaniswe khona.
  • Abanye ababhalisile abanamanqaku e-WiFI bagunyaziswe nge-PAP-CHAP protocol
  • Abanye ababhalisi abavela kumanqaku e-WIFI bagunyaziswe ngegama lomsebenzisi elilingana nedilesi ye-MAC yendawo ye-WIFI, ngaphandle kwegama lokugqitha.

Imvelaphi yembali: yintoni "Ukhetho 82" kwi-DHCP

Ezi zikhetho ezongezelelweyo zeprotocol ye-DHCP evumela ukuba udlulise ulwazi olongezelelweyo, umzekelo kwiinkalo ze-Agent-Circuit-Id kunye ne-Agent-Remote-Id. Ngokuqhelekileyo isetyenziselwa ukuhambisa idilesi ye-MAC yokutshintshwa kwe-relay kunye nezibuko apho umrhumi adityaniswe khona. Kwimeko yezixhobo ze-PON okanye izikhululo ezisisiseko ze-WIFI, i-Agent-Circuit-Id field ayinalo ulwazi oluluncedo (akukho zibuko lomrhumo). Isikimu esiqhelekileyo sokusebenza kweDHCP kule meko ngolu hlobo lulandelayo:

Iisetingi zenethiwekhi ukusuka kwiFreeRadius ngeDHCP

Inyathelo ngenyathelo esi sikimu sisebenza ngolu hlobo:

  1. Isixhobo somsebenzisi senza isicelo sokusasazwa kwe-DHCP ukufumana izicwangciso zenethiwekhi
  2. Isixhobo (umzekelo, iswitshi, iWiFi okanye isiseko se-PON) apho isixhobo somrhumo siqhagamshelwe ngokuthe ngqo “i-intercepts” le pakethe kwaye siyitshintsha, sazisa iinketho ezongezelelweyo Ukhetho lwe-82 kunye nedilesi ye-IP ye-ejenti ye-Relay kuyo, kwaye iyidlulisela ngaphezulu. inethiwekhi.
  3. Umncedisi we-DHCP wamkela isicelo, uvelisa impendulo kwaye uyithumele kwisixhobo sokubuyisela
  4. Isixhobo sokudlulisela phambili ipakethi yempendulo kwisixhobo sobhaliso

Ewe kunjalo, yonke into ayisebenzi ngokulula; kufuneka uqwalasele izixhobo zakho zenethiwekhi ngokufanelekileyo.

Ifakela iFreeRadius

Ngokuqinisekileyo, oku kunokufezekiswa nge-FreeRadius yokucwangcisa izicwangciso, kodwa kunzima kwaye akucaci ... ngakumbi xa uhamba emva kweenyanga ze-N kwaye "yonke into isebenza." Ke ngoko, sigqibe kwelokuba sibhale eyethu imodyuli yokugunyazisa iFreeRadius kwiPython. Siza kuthatha idatha yogunyaziso kwi-database ye-MySQL. Akukho sizathu sokuchaza ubume bayo; nangona kunjalo, wonke umntu uya kuzenzela "eyakhe." Ngokukodwa, ndathatha isakhiwo esinikezelwa nge-sql imodyuli ye-FreeRadius, kwaye ndayitshintsha kancinane ngokongeza i-mac kunye ne-port field kumrhumi ngamnye, ukongeza kwi-login-password.

Ke, kuqala, faka iFreeRadius:

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

Kwiisetingi, khetha ukuhlohla:

Iisetingi zenethiwekhi ukusuka kwiFreeRadius ngeDHCP

Senza i-symlink kwimodyuli yepython (okt "yivule":

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

Masifake imodyuli eyongezelelweyo yepython:

pip install mysql-connector

Kwizicwangciso zemodyuli yepython yeFreeRadius, kufuneka uchaze iindlela zokukhangela kwimodyuli kwi-python_path variable. Umzekelo ndinale nto:

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"

Unokufumana iindlela ngokuqalisa itoliki yepython kwaye ungenise imiyalelo:

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']
>

Ukuba awuthathi eli nyathelo, ngoko ke izikripthi ezibhalwe kwipython kwaye ziqaliswe yiFreeRadius aziyi kufumana iimodyuli ezidweliswe ngaphandle. Ukongeza, kuya kufuneka ukhulule imisebenzi yogunyaziso lokufowuna kunye ne-accounting kuseto lwemodyuli. Umzekelo, le modyuli ijongeka ngolu hlobo:

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}

}

Iskripthi se-work.py (kunye nazo zonke ezinye) kufuneka zibekwe kwi /usr/local/etc/raddb/mods-config/python Ndinezikripthi ezintathu zizonke.

work.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

Njengoko ubona kwikhowudi, sizama ukuchonga umrhumi usebenzisa zonke iindlela ezikhoyo ngombhalisi wakhe owaziwayo weedilesi ze-MAC okanye uKhetho lwe-82 indibaniselwano, kwaye ukuba oku kungasebenzi, ke sikhupha eyona dilesi ye-IP yakudala yakha yasetyenziswa “kundwendwe. ” inethiwekhi. Konke okuseleyo kukuqwalasela iskripthi esingagqibekanga kwisiqulathi seesayithi-enikwe amandla, ukwenzela ukuba imisebenzi eyimfuneko evela kwiskripthi se-python iya kuxubha ngexesha elichongiweyo. Enyanisweni, kwanele ukuzisa ifayile kwifom:

Engagqibekanga

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
}
}

Masizame ukuyiqhuba kwaye sibone ukuba yintoni engena kwilog yedebug:

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

Yintoni enye. Xa ucwangcisa iFreeRadius, kulungele ukuvavanya ukusebenza kwayo usebenzisa i-radclient utility. Umzekelo ugunyaziso:

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

Okanye iakhawunti:

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

Ndifuna ukukulumkisa ukuba akunakwenzeka ngokupheleleyo ukusebenzisa iskimu esinjalo kunye nezikripthi "ngaphandle kotshintsho" kwisikali "soshishino". Ubuncinci kuyaphawuleka:

  • kunokwenzeka ukuba "fake" idilesi ye-MAC. Kwanele ukuba umrhumi abhalise i-MAC yomnye umntu kwaye kuya kubakho iingxaki
  • Ingqiqo yokukhupha uthungelwano lweendwendwe ingaphaya kokugxekwa. Akukho nokuba kutshekishwa "mhlawumbi sele kukho abaxhasi abanedilesi ye-IP efanayo?"

Esi sisisombululo nje "se-cookie-cutter" eyenzelwe ukusebenza ngokukodwa kwiimeko zam, akukho okunye. Musa ukugweba ngokungqongqo 😉

umthombo: www.habr.com

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