CentOS7.4+FreeRadius+ldap（Windows AD）认证 搭建radius服务

（一）简介
freeradius一般用来进行账户认证管理，记账管理，常见的电信运营商的宽带账户，上网账户管理，记账，都是使用的radius服务器进行鉴权记账的。Freeradius包含一个radius服务器和radius-client，可以对支持radius协议的网络设备进行鉴权记账。 ------百度百科

（二）安装配置服务

[root@localhost ~]# yum install freeradius freeradius-ldap freeradius-utils -y
[root@localhost ~]# systemctl enable radiusd.service
[root@localhost ~]# systemctl start radiusd.service

（三）修改相关配置文件

3.1，修改/etc/raddb/mods-available/ldap文件，主要是ldap部分，其他的都是默认

[root@localhost raddb]#  cat /etc/raddb/mods-available/ldap | grep -v '#' | grep -v ^$
ldap {
server = 'x.x.x.x'   #服务器
port = 389   #端口
identity = 'CN=opsldap,CN=Users,DC=txxxdxx,DC=me'  #连接LDAP帐号
password =xxxxxxxx   #连接LDAP密码
base_dn = 'DC=txxxdxx,DC=me'   #dn
sasl {
}
update {
control:Password-With-Header    += 'userPassword'
control:                        += 'radiusControlAttribute'
request:                        += 'radiusRequestAttribute'
reply:                          += 'radiusReplyAttribute'
}
edir = no   #修改
user {
base_dn = "${..base_dn}"
filter = "(sAMAccountName=%{%{Stripped-User-Name}:-%{User-Name}})"     #修改成sAM
以下用默认
sasl {
}
}
group {
base_dn = "${..base_dn}"
filter = '(objectClass=posixGroup)'
membership_attribute = 'memberOf'
}
profile {
}
client {
base_dn = "${..base_dn}"
filter = '(objectClass=radiusClient)'
template {
}
attribute {
ipaddr                          = 'radiusClientIdentifier'
secret                          = 'radiusClientSecret'
}
}
accounting {
reference = "%{tolower:type.%{Acct-Status-Type}}"
type {
start {
update {
description := "Online at %S"
}
}
interim-update {
update {
description := "Last seen at %S"
}
}
stop {
update {
description := "Offline at %S"
}
}
}
}
post-auth {
update {
description := "Authenticated at %S"
}
}
options {
chase_referrals = yes
rebind = yes
res_timeout = 10
srv_timelimit = 3
net_timeout = 1
idle = 60
probes = 3
interval = 3
ldap_debug = 0x0028
}
tls {
}
pool {
start = ${thread[pool].start_servers}
min = ${thread[pool].min_spare_servers}
max = ${thread[pool].max_servers}
spare = ${thread[pool].max_spare_servers}
uses = 0
retry_delay = 30
lifetime = 0
idle_timeout = 60
}

3.2，创建软连接在mods-enable/模块下

[root@localhost raddb]# ln -s /etc/raddb/mods-available/ldap /etc/raddb/mods-enabled/
[root@localhost raddb]# ll /etc/raddb/mods-enabled/ldap
lrwxrwxrwx 1 root root 30 Jul 17 18:19 /etc/raddb/mods-enabled/ldap -> /etc/raddb/mods-available/ldap

3.3，在site-avaiable/下创建site_ldap文件

[root@localhost raddb]# cat /etc/raddb/sites-available/site_ldap

ldap {
server = 'x.x.8.55'   #服务器
port = 389   #端口
identity = 'CN=opsldap,CN=Users,DC=txxxdxx,DC=me'  #连接LDAP帐号
password =xxxxxxxx   #连接LDAP密码
base_dn = 'DC=txxxdxx,DC=me'   #dn
sasl {
}
update {
control:Password-With-Header    += 'userPassword'
control:                        += 'radiusControlAttribute'
request:                        += 'radiusRequestAttribute'
reply:                          += 'radiusReplyAttribute'
}
edir = no   #修改
user {
base_dn = "${..base_dn}"
filter = "(sAMAccountName=%{%{Stripped-User-Name}:-%{User-Name}})"     #修改成sAM
#以下用默认
sasl {
}
}
group {
base_dn = "${..base_dn}"
filter = '(objectClass=posixGroup)'
membership_attribute = 'memberOf'
}
profile {
}
client {
base_dn = "${..base_dn}"
filter = '(objectClass=radiusClient)'
template {
}
attribute {
ipaddr                          = 'radiusClientIdentifier'
secret                          = 'radiusClientSecret'
}
}
accounting {
reference = "%{tolower:type.%{Acct-Status-Type}}"
type {
start {
update {
description := "Online at %S"
}
}
interim-update {
update {
description := "Last seen at %S"
}
}
stop {
update {
description := "Offline at %S"

5b4
}
}
}
}
post-auth {
update {
description := "Authenticated at %S"
}
}
options {
chase_referrals = yes
rebind = yes
res_timeout = 10
srv_timelimit = 3
net_timeout = 1
idle = 60
probes = 3
interval = 3
ldap_debug = 0x0028
}
tls {
}
pool {
start = ${thread[pool].start_servers}
min = ${thread[pool].min_spare_servers}
max = ${thread[pool].max_servers}
spare = ${thread[pool].max_spare_servers}
uses = 0
retry_delay = 30
lifetime = 0
idle_timeout = 60
}
}

3.4，在site-enabled下创建软连接

[root@localhost raddb]# ln -s /etc/raddb/sites-available/site_ldap /etc/raddb/sites-enabled/
[root@localhost raddb]# ll /etc/raddb/sites-enabled/site_ldap
lrwxrwxrwx 1 root root 36 Jul 17 18:21 /etc/raddb/sites-enabled/site_ldap -> /etc/raddb/sites-available/site_ldap

（四），队radius进行相关的测试，可以通过重启服务器或者radiusd -X 进行测试设置

[root@localhost mods-available]# systemctl restart radiu
3344
sd
或者
[root@localhost mods-available]# radiusd  -X

4.1,修改 /etc/raddb/clients.conf 文件，客户端认证的网段和密钥。（修改服务器端记录客户端的配置文件 /etc/raddb/clients.conf 文件，该文件默认值提供了本机测试的 local 配置，即：安装完后默认只允许本机的client客户端访问radius服务器）

[root@localhost raddb]#  cat /etc/raddb/clients.conf | grep -v '#' | grep -v ^$
client localhost {        ###认证的网段
ipaddr = 127.0.0.1   ###被认证可以访问的ip地址
proto = *
secret = testing123      ###密钥
require_message_authenticator = no
limit {
max_connections = 16
lifetime = 0
idle_timeout = 30
}
}
client localhost_ipv6 {
ipv6addr    = ::1
secret      = testing123
}

4.2，修改测试用户文件/etc/raddb/users，添加测试账号bob，密钥：hello

[root@localhost raddb]#  cat /etc/raddb/users | grep -v '#' | grep -v ^$
bob Cleartext-Password := "hello"
Reply-Message := "Hello, %{User-Name}"
DEFAULT Framed-Protocol == PPP
Framed-Protocol = PPP,
Framed-Compression = Van-Jacobson-TCP-IP
DEFAULT Hint == "CSLIP"
Framed-Protocol = SLIP,
Framed-Compression = Van-Jacobson-TCP-IP
DEFAULT Hint == "SLIP"
Framed-Protocol = SLIP

4.3，测试是否正常

[root@localhost raddb]# radtest bob hello localhost 0 testing123
Sent Access-Request Id 151 from 0.0.0.0:52757 to 127.0.0.1:1812 length 73
User-Name = "bob"
User-Password = "hello"
NAS-IP-Address = 127.0.0.1
NAS-Port = 0
Message-Authenticator = 0x00
Cleartext-Password = "hello"
Received Access-Accept Id 151 from 127.0.0.1:1812 to 0.0.0.0:0 length 32
Reply-Message = "Hello, bob"

（五）Freeradius添加其他网段的测试
1，服务器端配置：修改vim /etc/raddb/clients.conf 文件，增加一个client并配置共享密钥 secret = tdops,shortname可以任意。clientIP可以是一个地址也可以是一个网段。
，添加如下格式的认证

[root@localhost raddb]# vim /etc/raddb/clients.conf
client 172.20.66.0/24 {
secret = testing123
showtanme = CE-SW
}

2，在规定网段的主机做测试。

[root@localhost ~]#  radtest lqb xxx 172.20.66.127:1833 0 testing123
Sent Access-Request Id 186 from 0.0.0.0:39032 to 172.20.66.127:1833 length 80
User-Name = "lqb"
User-Password = "xxx"
NAS-IP-Address = 127.0.0.1
NAS-Port = 0
Message-Authenticator = 0x00
Cleartext-Password = "xxx"
Received Access-Accept Id 186 from 172.20.66.127:1833 to 0.0.0.0:0 length 20

3,服务端的日志为：

Wed Jul 18 16:18:31 2018 : Info: Need 5 more connections to reach 10 spares
Wed Jul 18 16:18:31 2018 : Info: rlm_ldap (ldap): Opening additional connection (5), 1 of 27 pending slots used
Wed Jul 18 16:18:31 2018 : Auth: (0) Login OK: [lqb (from client 172.20.66.0/24 port 0)

至此通过Windows的AD域认证完成。