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1.1.1.2 ! misho 9: <A HREF="mpd.html"><EM>Mpd 5.7 User Manual</EM></A>
1.1 misho 10: <b>:</b> <A HREF="mpd17.html"><EM>Configuring Mpd</EM></A>
11: <b>:</b> <A HREF="mpd29.html"><EM>Authentication, Authorization and Accounting (AAA)</EM></A>
12: <b>:</b> <EM>RADIUS</EM><BR>
13: <b>Previous:</b> <A HREF="mpd29.html"><EM>Authentication, Authorization and Accounting (AAA)</EM></A><BR>
14: <b>Next:</b> <A HREF="mpd31.html"><EM>External authentication</EM></A>
15:
16:
17: <HR NOSHADE>
18: <H2><A NAME="30"></A>4.10.1. RADIUS<A NAME="radius"></A></H2>
19:
20: <p>This chapter describes RADIUS authentication backend.
21: Mpd supports both user authentication and session accounting using RADIUS.
22: RADIUS-Accounting and RADIUS-Authentication are independant so it is possible
23: to use them in any combination.</p>
24: <p>All authentication methods are supported with RADIUS (PAP, CHAP, MS-CHAPv1,
25: MS-CHAPv2, EAP). Password changing is currently not supported.</p>
26: <p>All of these commands apply to the currently active link.</p>
27: <p>
28: <dl>
29:
30: <dt><b><code>set radius server <em>name</em> <em>secret</em> [ <em>auth-port</em> [ <em>acct-port</em> ]]</code></b><dd><p>Configure RADIUS server parameters. Multiple RADIUS servers may be configured
31: by repeating this command, and up to 10 servers may be specified.
32: If one of auth/acct ports specified as 0, it will not be used for requests
33: of that type.</p>
34:
1.1.1.2 ! misho 35: <dt><b><code>unset radius server <em>name</em> [ <em>auth-port</em> [ <em>acct-port</em> ]]</code></b><dd><p>Deletes cpecific RADIUS server from pool.</p>
! 36:
1.1 misho 37: <dt><b><code>set radius timeout <em>seconds</em></code></b><dd><p>Set the timeout for completion of RADIUS requests.</p>
38: <p>The default is 5 second.</p>
39:
40: <dt><b><code>set radius retries <em>#retries</em></code></b><dd><p>Set the number of retries for RADIUS requests.</p>
41: <p>The default is 3 retries.</p>
42:
43: <dt><b><code>set radius me <em>IP</em>|<em>ifname</em>|<em>hostname</em></code></b><dd><p>Send the given IP in the RAD_NAS_IP_ADDRESS attribute to the server.</p>
44:
45: <dt><b><code>set radius v6me <em>IPv6</em></code></b><dd><p>Send the given IP in the RAD_NAS_IPV6_ADDRESS attribute to the server.</p>
46:
47: <dt><b><code>set radius identifier <em>name</em></code></b><dd><p>Send the given name in the RAD_NAS_IDENTIFIER attribute to the server.
48: If not set the local hostname is used.</p>
49:
50: <dt><b><code>set radius enable message-authentic</code></b><dd><p>Adds the Message-Authenticator attribute to the RADIUS request.
51: The Message-Authenticator is an HMAC-MD5 checksum of the entire
52: Access-Request packet using the shared secret as the key. This
53: should protect the RADIUS server against online dictionary attacks.
54: This is mandatory when using the EAP-RADIUS-Proxy and it's implicitly
55: added to the request by Mpd.</p>
56:
57: <dt><b>RADIUS internals</b><dd>
58: <p>RADIUS attributes supported by mpd:
59: <pre>
60: N Name Access Accounting
61: Req Resp Req Resp
62: 1 User-Name + + + -
63: 2 User-Password + - - -
64: 3 CHAP-Password + - - -
65: 4 NAS-IP-Address + - + -
66: 5 NAS-Port + - + -
67: 6 Service-Type + - + -
68: 7 Framed-Protocol + - + -
69: 8 Framed-IP-Address - + + -
70: 9 Framed-IP-Netmask - + + -
71: 12 Framed-MTU - + - -
72: 13 Framed-Compression - + - -
73: 18 Reply-Message - + - -
74: 22 Framed-Route - + - -
75: 24 State + + + -
76: 25 Class - + + -
77: 27 Session-Timeout - + - -
78: 28 Idle-Timeout - + - -
79: 30 Called-Station-Id + - + -
80: 31 Calling-Station-Id + - + -
81: 32 NAS-Identifier + - + -
82: 40 Acct-Status-Type - - + -
83: 42 Acct-Input-Octets - - + -
84: 43 Acct-Output-Octets - - + -
85: 44 Acct-Session-Id + - + -
86: 45 Acct-Authentic - - + -
87: 46 Acct-Session-Time - - + -
88: 47 Acct-Input-Packets - - + -
89: 48 Acct-Output-Packets - - + -
90: 49 Acct-Terminate-Cause - - + -
91: 50 Acct-Multi-Session-Id - - + -
92: 51 Acct-Link-Count - - + -
93: 52 Acct-Input-Gigawords - - + -
94: 53 Acct-Output-Gigawords - - + -
95: 60 CHAP-Challenge + - - -
96: 61 NAS-Port-Type + - + -
97: 64 Tunnel-Type + - + -
98: 65 Tunnel-Medium-Type + - + -
99: 66 Tunnel-Client-Endpoint + - + -
100: 67 Tunnel-Server-Endpoint + - + -
101: 85 Acct-Interim-Interval - + - -
102: 87 NAS-Port-Id + - + -
103: 88 Framed-Pool - + - -
104: 90 Tunnel-Client-Auth-ID + - + -
105: 91 Tunnel-Server-Auth-ID + - + -
106: 95 NAS-IPv6-Address + - + -
107: 99 Framed-IPv6-Route - + - -
108:
109: Microsoft VSA (311)
110: 1 MS-CHAP-Response + - - -
111: 2 MS-CHAP-Error - + - -
112: 7 MS-MPPE-Encryption-Policy - + - -
113: 8 MS-MPPE-Encryption-Types - + - -
114: 10 MS-CHAP-Domain - + - -
115: 11 MS-CHAP-Challenge + - - -
116: 12 MS-CHAP-MPPE-Keys - + - -
117: 16 MS-MPPE-Send-Key - + - -
118: 17 MS-MPPE-Recv-Key - + - -
119: 25 MS-CHAP2-Response + - - -
120: 26 MS-CHAP2-Success - + - -
121: 28 MS-Primary-DNS-Server - + - -
122: 29 MS-Secondary-DNS-Server - + - -
123: 30 MS-Primary-NBNS-Server - + - -
124: 31 MS-Secondary-NBNS-Server - + - -
125:
126: DSL Forum VSA (3561)
127: 1 ADSL-Agent-Circuit-Id + - + -
128: 2 ADSL-Agent-Remote-Id + - + -
129:
130: mpd VSA (12341)
131: 1 mpd-rule - + - -
132: 2 mpd-pipe - + - -
133: 3 mpd-queue - + - -
134: 4 mpd-table - + - -
135: 5 mpd-table-static - + - -
136: 6 mpd-filter - + - -
137: 7 mpd-limit - + - -
138: 8 mpd-input-octets - - + -
139: 9 mpd-input-packets - - + -
140: 10 mpd-output-octets - - + -
141: 11 mpd-output-packets - - + -
142: 12 mpd-link + - + -
143: 13 mpd-bundle - - + -
144: 14 mpd-iface - - + -
145: 15 mpd-iface-index - - + -
146: 16 mpd-input-acct - + - -
147: 17 mpd-output-acct - + - -
148: 18 mpd-action - + - -
149: 19 mpd-peer-ident + - + -
150: 20 mpd-iface-name - + - -
151: 21 mpd-iface-descr - + - -
152: 22 mpd-iface-group - + - -
153: 154 mpd-drop-user - - - +
154: </pre>
155: </p>
156: <p>To use mpd VSA you should add such dictionary to your RADIUS server:
157: <pre>
158: #----------------------------------------------------------
159: # dictionary.mpd
160:
161: VENDOR mpd 12341
162:
163: BEGIN-VENDOR mpd
164:
165: ATTRIBUTE mpd-rule 1 string
166: ATTRIBUTE mpd-pipe 2 string
167: ATTRIBUTE mpd-queue 3 string
168: ATTRIBUTE mpd-table 4 string
169: ATTRIBUTE mpd-table-static 5 string
170: ATTRIBUTE mpd-filter 6 string
171: ATTRIBUTE mpd-limit 7 string
172: ATTRIBUTE mpd-input-octets 8 string
173: ATTRIBUTE mpd-input-packets 9 string
174: ATTRIBUTE mpd-output-octets 10 string
175: ATTRIBUTE mpd-output-packets 11 string
176: ATTRIBUTE mpd-link 12 string
177: ATTRIBUTE mpd-bundle 13 string
178: ATTRIBUTE mpd-iface 14 string
179: ATTRIBUTE mpd-iface-index 15 integer
180: ATTRIBUTE mpd-input-acct 16 string
181: ATTRIBUTE mpd-output-acct 17 string
182: ATTRIBUTE mpd-action 18 string
183: ATTRIBUTE mpd-peer-ident 19 string
184: ATTRIBUTE mpd-iface-name 20 string
185: ATTRIBUTE mpd-iface-descr 21 string
186: ATTRIBUTE mpd-iface-group 22 string
187: ATTRIBUTE mpd-drop-user 154 integer
188:
189: END-VENDOR mpd
190: #----------------------------------------------------------
191: </pre>
192: </p>
193: <p>Mpd allows RADIUS server to terminate user session by setting vendor specific
194: mpd-drop-user attribute to nonzero value in accounting start/update reply packet.</p>
195:
196: <dt><b>RADIUS ACL's</b><dd>
197: <p>Mpd can use the Access Control Lists (ACLs) given by the RADIUS server.
198: This ACLs may include ipfw rules, pipes, queues and tables and also mpd
199: internal traffic filtering/shaping/limiting features. That two sets are
200: redundant. ipfw proposed as standard and universal solution, while internal
201: filter/shaper/limiter based on ng_bpf+ng_car expected to work faster with
202: big number of active links.</p>
203:
204: <dt><b>ipfw</b><dd>
205: <p>You can write in your RADIUS configuration something like:
206: <pre>
207: mpd-table += "1=10.0.0.1",
208: mpd-table += "1=10.0.0.15",
209: mpd-pipe += "1=bw 10Kbyte/s",
210: mpd-pipe += "5=bw 20Kbyte/s",
211: mpd-rule += "1=pipe %p1 all from any to table\\(%t1\\) in",
212: mpd-rule += "2=pipe %p5 all from table\\(%t1\\) to any out",
213: mpd-rule += "100=allow all from any to any",
214: </pre>
215: </p>
216: <p>When mpd receives these parameters it will call ipfw(8) to create
217: firewall rules, pipes and queues with unique numbers starting from 10000
218: (configurable via 'set global start...'). %rX, %pX, %qX, %tX
219: macroses will be expanded within mpd-rule and mpd-queue.
220: To the end of each rule will be added "via ngX" to make the rule apply
221: only to that client's networking interface.</p>
222: <p>As a result of this example we would get these commands executed:
223: <pre>
224: ipfw table 32 add 10.0.0.1
225: ipfw table 32 add 10.0.0.15
226: ipfw pipe 10000 config bw 10Kbyte/s
227: ipfw pipe 10001 config bw 20Kbyte/s
228: ipfw add 10000 pipe 10000 all from any to table\(32\) in via ng0
229: ipfw add 10001 pipe 10001 all from table\(32\) to any out via ng0
230: ipfw add 10002 allow all from any to any via ng0
231: </pre>
232:
233: When the link goes down, all created rules will be removed.</p>
234: <p>Note: As soon as mpd executes ipfw commands using shell, shell's
235: special characters like "(" and ")" must be slashed.</p>
236:
237: <dt><b>internal (ng_bpf/ng_car)</b><dd>
238: <p>Mpd can create complex per-interface traffic filtering/limiting engines inside
239: netgraph when it is requested by mpd-filter and mpd-limit RADIUS attributes.</p>
240: <p>mpd-filter attribute is a packet filter declaration for using in mpd-limit.
241: mpd-filter consists of two main parts: match/nomatch verdict and the condition.
242: tcpdump (libpcap) expression syntax used for conditions.</p>
243: <p>mpd-filter: <em>match</em>|<em>nomatch</em> <em>{condition}</em></p>
244: <p>mpd-limit attribute is an action which should be done for packet. It consists
245: of two main parts: filter and action. </p>
246: <p>mpd-limit: <em>{filter}</em> <em>{action}</em></p>
247: <p>Filter can be or "all" (any packet) or "fltX"
248: (packets matching to specified mpd-filter).</p>
249: <p>filter: <em>any</em>|<em>fltX</em></p>
250: <p>Action can be: "" (do nothing, just account),
251: "pass" (stop processing and pass packet),
252: "deny" (stop processing and drop packet),
253: "rate-limit" (do Cisco-like rate-limit),
254: "shape" (do simple RED aware traffic shaping). </p>
255: <p>Actions "rate-limit" and "shape" can have optional "pass" suffix
256: to stop processing after doing this action.</p>
257: <p>action: <em></em> | <em>pass</em> | <em>deny</em> |
258: <em>rate-limit</em> <em>{rate(bits/s)}</em> [<em>{normal burst(bytes)}</em> [<em>{extended burst(bytes)}</em>]] [<em>pass</em>] |
259: <em>shape</em> <em>{rate(bits/s)}</em> [<em>{burst(bytes)}</em>] [<em>pass</em>]</p>
260: <p>As example you can write in your RADIUS configuration something like:
261: <pre>
262: mpd-filter += "1#1=nomatch dst net 10.0.0.0/24",
263: mpd-filter += "1#2=match dst net 10.0.0.0/8",
264: mpd-filter += "2#1=nomatch src net 10.0.0.0/24",
265: mpd-filter += "2#2=match src net 11.0.0.0/8",
266: mpd-limit += "in#1=flt1 pass",
267: mpd-limit += "in#2#Biz=all shape 64000 4000",
268: mpd-limit += "out#1=flt2 pass",
269: mpd-limit += "out#2#Biz=all rate-limit 1024000 150000 300000",
270: </pre>
271: </p>
272: <p>As result, one ng_bpf node will be created to implement traffic filters
273: and several (two for this example) ng_car nodes for traffic shaping
274: and rate-limiting. Incoming traffic to 10.0.0.0/8 except 10.0.0.0/24
275: will be passed, other traffic will be shaped to 64Kbits/s. Outgoing
276: traffic from 10.0.0.0/8 except 10.0.0.0/24 will be passed, all other
277: will be limited to 1024Kbit/s. Also traffic that passed mpd-limit rules
278: marked "Biz" will be accordingly accounted and present with that name
279: in AAA accounting requests.</p>
280:
281:
282: </dl>
283: </p>
284: <HR NOSHADE>
1.1.1.2 ! misho 285: <A HREF="mpd.html"><EM>Mpd 5.7 User Manual</EM></A>
1.1 misho 286: <b>:</b> <A HREF="mpd17.html"><EM>Configuring Mpd</EM></A>
287: <b>:</b> <A HREF="mpd29.html"><EM>Authentication, Authorization and Accounting (AAA)</EM></A>
288: <b>:</b> <EM>RADIUS</EM><BR>
289: <b>Previous:</b> <A HREF="mpd29.html"><EM>Authentication, Authorization and Accounting (AAA)</EM></A><BR>
290: <b>Next:</b> <A HREF="mpd31.html"><EM>External authentication</EM></A>
291:
292:
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294: </BODY>
295: </HTML>
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