AAA на примере FreeRadius
Содержание
AAA на примере FreeRadius
AAA
A
A
A
local LDAP Kerberos RADIUS TACACS+ SSO
RADIUS-server <---> NAS <---> user
freeradius
apt-get install freeradius
NAS:
/etc/freeradius/clients.conf
client 10.13.0.2 {
ipaddr = 10.13.0.2
secret = testing123
}
Пользователи:
/etc/freeradius/users
cisco Cleartext-Password := "ciscocisco"
service freeradius stop freeradius -X
Проверка:
root@model-net-ctrl-1:~# radtest cisco ciscocisco 127.0.0.1 0 testing123
Sending Access-Request of id 118 to 127.0.0.1 port 1812
User-Name = "cisco"
User-Password = "ciscocisco"
NAS-IP-Address = 212.192.64.218
NAS-Port = 0
Message-Authenticator = 0x00000000000000000000000000000000
rad_recv: Access-Accept packet from host 127.0.0.1 port 1812, id=118, length=20
Cisco IOS
default config
Начальная конфигурация коммутатора для работы выглядит так
!
service timestamps log datetime msec localtime show-timezone year
!
enable secret 5 $1$eII1$tBNEV9R6Gzy2cr/9rAaxk1
!
username cisco1 secret 5 $1$d08J$pSSW3WfregkPKjYJAWjyX0
no aaa new-model
clock timezone GMT+6 6 0
!
vlan internal allocation policy ascending
!
vlan 88
!
interface range FastEthernet0/1 - 24
switchport access vlan 88
switchport mode access
spanning-tree portfast
!
interface Vlan88
ip address 212.192.88.150 255.255.255.0
no shut
!
ip default-gateway 212.192.88.1
!
line vty 0 15
logging synchronous
login local
!
ntp server 212.192.64.2
AAA new-model
aaa new-model
!
radius-server host 212.192.64.174 auth-port 1812 acct-port 1813 timeout 2 retransmit 1 key superciscosecret
!
aaa group server radius RAD-GROUP
server 212.192.64.174 auth-port 1812 acct-port 1813
!
aaa authentication login ADMINUSERS group RAD-GROUP local
! new login auth-list “ADMINUSERS” with local fallback
!
aaa authentication enable default enable
! use enable password to enter enable mode in default auth-list
!
!
line vty 0 15
login authentication ADMINUSERS
!
term mon debug radius test aaa group RAD-GROUP cisco ciscocisco port 1 new-code un all term no mon
При выключенном сервере коммутатор после 4 попыток перейдет на локальную аутентификацию. Т.е. без радиус-сервера мы по прежнему можем попасть на коммутатор под локальным пользователем.
freeradius
client switch150 {
ipaddr = 212.192.88.150
secret = superciscosecret
}
SSH