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+Freeradius REST API is configuration to make Freeradius talk to PHPNuxBill via HTTP Connection, configuration is simple more simple
+
+# Installing freeradius
+
+```bash
+apt-get -y install freeradius freeradius-rest
+```
+
+edit clients.conf
+
+```bash
+nano /etc/freeradius/3.0/clients.conf
+```
+
+Add your Mikrotik IP or your Public IP, this is example, everytime you add/edit Client, restart freeradius
+
+```bash
+client myRouterA {
+	ipaddr		= 10.0.1.0/24
+	secret		= verysecret
+}
+
+client myRouterB {
+	ipaddr		= 10.0.2.0/24
+	secret		= secretvery
+}
+```
+
+edit clients.conf
+
+```bash
+nano /etc/freeradius/3.0/mods-enabled/rest
+```
+
+use this configuration, change `phpnuxbill.domain` with your domain
+
+```bash
+rest {
+    tls {
+        # ca_file = ${certdir}/ca.pem
+		# ca_info_file = ${certdir}/cacert_bundle.pem
+		# ca_path = ${certdir}
+        check_cert = no
+        check_cert_cn = no
+    }
+	connect_uri = "https://phpnuxbill.domain/radius.php"
+
+	authenticate {
+		uri = "${..connect_uri}?action=authenticate"
+        method = 'post'
+        body = 'post'
+        data = "username=%{urlquote:%{User-Name}}&password=%{urlquote:%{User-Password}}&macAddr=%{urlquote:%{Calling-Station-Id}}&nasip=%{urlquote:%{NAS-IP-Address}}"
+		tls = ${..tls}
+	}
+
+    authorize {
+            uri = "${..connect_uri}?action=authorize"
+            method = 'post'
+            body = 'post'
+            data = "username=%{urlquote:%{User-Name}}&password=%{urlquote:%{User-Password}}&macAddr=%{urlquote:%{Calling-Station-Id}}&nasip=%{urlquote:%{NAS-IP-Address}}"
+		tls = ${..tls}
+    }
+
+	accounting {
+		uri = "${..connect_uri}?action=accounting"
+		method = 'post'
+		body = 'post'
+        data = "username=%{urlquote:%{User-Name}}&nasIpAddress=%{urlquote:%{NAS-IP-Address}}&nasid=%{urlquote:%{NAS-Identifier}}\
+&acctSessionId=%{urlquote:%{Acct-Session-Id}}&macAddr=%{urlquote:%{Calling-Station-Id}}&acctSessionTime=%{urlquote:%{Acct-Session-Time}}\
+&acctInputOctets=%{urlquote:%{Acct-Input-Octets}}&acctOutputOctets=%{urlquote:%{Acct-Output-Octets}}\
+&acctInputGigawords=%{urlquote:%{Acct-Input-Gigawords}}&acctOutputGigawords=%{urlquote:%{Acct-Output-Gigawords}}\
+&acctInputPackets=%{urlquote:%{Acct-Input-Packets}}&acctOutputPackets=%{urlquote:%{Acct-Output-Packets}}\
+&nasPortId=%{urlquote:%{NAS-Port-Id}}&framedIPAddress=%{urlquote:%{Framed-IP-Address}}\
+&sessionTimeout=%{urlquote:%{Session-Timeout}}&framedIPNetmask=%{urlquote:%{Framed-IP-Netmask}}\
+&acctStatusType=%{urlquote:%{Acct-Status-Type}}&nasPortType=%{urlquote:%{NAS-Port-Type}}"
+		tls = ${..tls}
+	}
+
+    post-auth {
+        uri = "${..connect_uri}?action=post-auth"
+        method = 'post'
+        body = 'post'
+        data = "username=%{urlquote:%{User-Name}}"
+		tls = ${..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
+	}
+}
+```
+
+edit sites
+
+```bash
+nano /etc/freeradius/3.0/sites-enabled/default 
+```
+
+Configure just like this, don't delete others
+
+```
+authorize {
+#   filter_username
+#	filter_password
+#	preprocess
+#	operator-name
+#	cui
+#	auth_log
+	rest
+    if (ok) {
+        update control {
+            Auth-Type := rest
+        }
+    }
+
+    ....
+}
+
+authenticate {
+    Auth-Type rest {
+        rest {
+            updated = 1
+        }
+        if (updated) {
+            ok
+        }
+    }
+	Auth-Type rest {
+		rest
+	}
+
+    ....
+}
+
+accounting {
+	detail
+	rest
+
+    ....
+}
+
+session {
+	radutmp
+    
+    ....
+}
+
+post-auth {
+	if (reply:Group-Name) {
+        update control {
+            &Group := "%{reply:Group-Name}"
+        }
+    }
+    if (reply:Mikrotik-Rate-Limit) {
+        update reply {
+            Mikrotik-Rate-Limit := "%{reply:Mikrotik-Rate-Limit}"
+        }
+    }
+    if (reply:Expiration) {
+        update reply {
+            Expiration := "%{reply:Expiration}"
+        }
+    }
+	update {
+		&reply: += &session-state:
+	}
+}
+
+
+```
+
+restart services
+
+```bash
+systemctl restart freeradius.service
+```
+
+
+## DEBUG
+
+To check if someting wrong, stop freeradius
+
+```bash
+systemctl stop freeradius.service
+```
+
+Activate log in Mikrotik
+
+```bash
+/system logging add topics=radius,debug action=memory
+```
+
+run radius just like this
+
+```bash
+freeradius -X
+```
+
+then try to login
+
+## Example configuration at Mikrotik
+
+make timeout to 3000, it will show any error from freeradius when login
+
+<img width="385" alt="Tangkapan Layar 2024-07-04 pukul 14 48 28" src="https://github.com/hotspotbilling/phpnuxbill/assets/811955/61f51286-1c93-4845-b9d3-bf769899cf95">