# -*- text -*- ## ## proxy.conf -- proxy radius and realm configuration directives ## ## $Id: proxy.conf,v 1.30 2007/12/31 03:26:59 aland Exp $ ####################################################################### # # Proxy server configuration # # This entry controls the servers behaviour towards ALL other servers # to which it sends proxy requests. # proxy server { # # Note that as of 2.0, the "synchronous", "retry_delay", # "retry_count", and "dead_time" have all been deprecated. # For backwards compatibility, they are are still accepted # by the server, but they ONLY apply to the old-style realm # configuration. i.e. realms with "authhost" and/or "accthost" # entries. # # i.e. "retry_delay" and "retry_count" have been replaced # with per-home-server configuration. See the "home_server" # example below for details. # # i.e. "dead_time" has been replaced with a per-home-server # "revive_interval". We strongly recommend that this not # be used, however. The new method is much better. # # In 2.0, the server is always "synchronous", and setting # "synchronous = no" is impossible. This simplifies the # server and increases the stability of the network. # # If you need to set "synchronous = no", please send a # message to the list <freeradius-users@lists.freeradius.org> # explaining why this feature is vital for your network. # # If a realm exists, but there are no live home servers for # it, we can fall back to using the "DEFAULT" realm. This is # most useful for accounting, where the server can proxy # accounting requests to home servers, but if they're down, # use a DEFAULT realm that is LOCAL (i.e. accthost = LOCAL), # and then store the packets in the "detail" file. That data # can be later proxied to the home servers by radrelay, when # those home servers come back up again. # Setting this to "yes" may have issues for authentication. # i.e. If you are proxying for two different ISP's, and then # act as a general dial-up for Gric. If one of the first two # ISP's has their RADIUS server go down, you do NOT want to # proxy those requests to GRIC. Instead, you probably want # to just drop the requests on the floor. In that case, set # this value to 'no'. # # allowed values: {yes, no} # default_fallback = no } ####################################################################### # # Configuration for the proxy realms. # # As of 2.0. the old-style "realms" file is deprecated, and is not # used by FreeRADIUS. # # As of 2.0, the "realm" configuration has changed. Instead of # specifying "authhost" and "accthost" in a realm section, the home # servers are specified seperately in a "home_server" section. For # backwards compatibility, you can still use the "authhost" and # "accthost" directives. If you only have one home server for a # realm, it is easier to use the old-style configuration. # # However, if you have multiple servers for a realm, we STRONGLY # suggest moving to the new-style configuration. # # # Load-balancing and failover between home servers is handled via # a "home_server_pool" section. # # Finally, The "realm" section defines the realm, some options, and # indicates which server pool should be used for the realm. # # This change means that simple configurations now require multiple # ssections to define a realm. However, complex configurations # are much simpler than before, as multiple realms can share the same # server pool. # # That is, realms point to server pools, and server pools point to # home servers. Multiple realms can point to one server pool. One # server pool can point to multiple home servers. Each home server # can appear in one or more pools. # ###################################################################### # # This section defines a "Home Server" which is another RADIUS # server that gets sent proxied requests. In earlier versions # of FreeRADIUS, home servers were defined in "realm" sections, # which was awkward. In 2.0, they have been made independent # from realms, which is better for a number of reasons. # home_server localhost { # # Home servers can be sent Access-Request packets # or Accounting-Request packets. # # Allowed values are: # auth - Handles Access-Request packets # acct - Handles Accounting-Request packets # auth+acct - Handles Access-Request packets at "port", # and Accounting-Request packets at "port + 1" type = auth # # Configure ONE OF the following two entries: # # IPv4 address # ipaddr = 127.0.0.1 # OR IPv6 address # ipv6addr = ::1 # Note that while both ipaddr and ipv6addr will accept # both addresses and host names, we do NOT recommend # using host names. When you specify a host name, the # server has to do a DNS lookup to find the IP address # of the home server. If the DNS server is slow or # unresponsive, it means that FreeRADIUS will NOT be # able to determine the address, and will therefore NOT # start. # # Also, the mapping of host name to address is done ONCE # when the server starts. If DNS is later updated to # change the address, FreeRADIUS will NOT discover that # until after a re-start, or a HUP. # # The port to which packets are sent. # # Usually 1812 for type "auth", and 1813 for type "acct". # Older servers may use 1645 and 1646. # port = 1812 # # The shared secret use to "encrypt" and "sign" packets between # FreeRADIUS and the home server. # # The secret can be any string, up to 8k characters in length. # # Control codes can be entered vi octal encoding, # e.g. "\101\102" == "AB" # Quotation marks can be entered by escaping them, # e.g. "foo\"bar" # Spaces or other "special" characters can be entered # by putting quotes around the string. # e.g. "foo bar" # "foo;bar" # secret = testing123 ############################################################ # # The rest of the configuration items listed here are optional, # and do not have to appear in every home server definition. # ############################################################ # # If the home server doesn't respond to the request within # this time, this server will consider the request dead, and # respond to the NAS with an Access-Reject. # # Useful range of values: 5 to 60 response_window = 20 # # If the home server does not respond to ANY packets for # a certain time, consider it dead. This time period is # called the "zombie" period, because the server is neither # alive nor dead. # # Useful range of values: 20 to 120 zombie_period = 40 ############################################################ # # As of 2.0, FreeRADIUS supports RADIUS layer "status # checks". These are used by a proxy server to see if a home # server is alive. # # These status packets are sent ONLY if the proxying server # believes that the home server is dead. They are NOT sent # if the proxying server believes that the home server is # alive. They are NOT sent if the proxying server is not # proxying packets. # # If the home server responds to the status check packet, # then it is marked alive again, and is returned to use. # ############################################################ # # Some home servers do not support status checks via the # Status-Server packet. Others may not have a "test" user # configured that can be used to query the server, to see if # it is alive. For those servers, we have NO WAY of knowing # when it becomes alive again. Therefore, after the server # has been marked dead, we wait a period of time, and mark # it alive again, in the hope that it has come back to # life. # # If it has NOT come back to life, then FreeRADIUS will wait # for "zombie_period" before marking it dead again. During # the "zombie_period", ALL AUTHENTICATIONS WILL FAIL, because # the home server is still dead. There is NOTHING that can # be done about this, other than to enable the status checks, # as documented below. # # e.g. if "zombie_period" is 40 seconds, and "revive_interval" # is 300 seconds, the for 40 seconds out of every 340, or about # 10% of the time, all authentications will fail. # # If the "zombie_period" and "revive_interval" configurations # are set smaller, than it is possible for up to 50% of # authentications to fail. # # As a result, we recommend enabling status checks, and # we do NOT recommend using "revive_interval". # # If the "status_check" entry below is not "none", then the # "revive_interval" entry can be deleted, as it will not be # used. # # Useful range of values: 60 to 3600 revive_interval = 120 # # The proxying server (i.e. this one) can do periodic status # checks to see if a dead home server has come back alive. # # If set to "none", then the other configuration items listed # below are not used, and the "revive_interval" time is used # instead. # # If set to "status-server", the Status-Server packets are # sent. Many RADIUS servers support Status-Server. If a # server does not support it, please contact the server # vendor and request that they add it. # # If set to "request", then Access-Request, or Accounting-Request # packets are sent, depending on the "type" entry above (auth/acct). # # Allowed values: none, status-server, request status_check = status-server # # If the home server does not support Status-Server packets, # then the server can still send Access-Request or # Accounting-Request packets, with a pre-defined user name. # # This practice is NOT recommended, as it may potentially let # users gain network access by using these "test" accounts! # # If it is used, we recommend that the home server ALWAYS # respond to these Access-Request status checks with # Access-Reject. The status check just needs an answer, it # does not need an Access-Accept. # # For Accounting-Request status checks, only the username # needs to be set. The rest of the accounting attribute are # set to default values. The home server that receives these # accounting packets SHOULD NOT treat them like normal user # accounting packets. i.e It should probably NOT log them to # a database. # # username = "test_user_please_reject_me" # password = "this is really secret" # # Configure the interval between sending status check packets. # # Setting it too low increases the probability of spurious # fail-over and fallback attempts. # # Useful range of values: 6 to 120 check_interval = 30 # # Configure the number of status checks in a row that the # home server needs to respond to before it is marked alive. # # If you want to mark a home server as alive after a short # time period of being responsive, it is best to use a small # "check_interval", and a large value for # "num_answers_to_alive". Using a long "check_interval" and # a small number for "num_answers_to_alive" increases the # probability of spurious fail-over and fallback attempts. # # Useful range of values: 3 to 10 num_answers_to_alive = 3 } ###################################################################### # # This section defines a pool of home servers that is used # for fail-over and load-balancing. In earlier versions of # FreeRADIUS, fail-over and load-balancing were defined per-realm. # As a result, if a server had 5 home servers, each of which served # the same 10 realms, you would need 50 "realm" entries. # # In version 2.0, you would need 5 "home_server" sections, # 10 'realm" sections, and one "home_server_pool" section to tie the # two together. # home_server_pool my_auth_failover { # # The type of this pool controls how home servers are chosen. # # fail-over - the request is sent to the first live # home server in the list. i.e. If the first home server # is marked "dead", the second one is chosen, etc. # # load-balance - the least busy home server is chosen, # where "least busy" is counted by taking the number of # requests sent to that home server, and subtracting the # number of responses received from that home server. # # If there are two or more servers with the same low # load, then one of those servers is chosen at random. # This configuration is most similar to the old # "round-robin" method, though it is not exactly the same. # # Note that load balancing does not work well with EAP, # as EAP requires packets for an EAP conversation to be # sent to the same home server. The load balancing method # does not keep state in between packets, meaning that # EAP packets for the same conversation may be sent to # different home servers. This will prevent EAP from # working. # # For non-EAP authentication methods, and for accounting # packets, we recommend using "load-balance". It will # ensure the highest availability for your network. # # client-balance - the home server is chosen by hashing the # source IP address of the packet. If that home server # is down, the next one in the list is used, just as # with "fail-over". # # There is no way of predicting which source IP will map # to which home server. # # This configuration is most useful to do simple load # balancing for EAP sessions, as the EAP session will # always be sent to the same home server. # # client-port-balance - the home server is chosen by hashing # the source IP address and source port of the packet. # If that home server is down, the next one in the list # is used, just as with "fail-over". # # This method provides slightly better load balancing # for EAP sessions than "client-balance". However, it # also means that authentication and accounting packets # for the same session MAY go to different home servers. # # keyed-balance - the home server is chosen by hashing (FNV) # the contents of the Load-Balance-Key attribute from the # control items. The request is then sent to home server # chosen by taking: # # server = (hash % num_servers_in_pool). # # If there is no Load-Balance-Key in the control items, # the load balancing method is identical to "load-balance". # type = fail-over # # Next, a list of one or more home servers. The names # of the home servers are NOT the hostnames, but the names # of the sections. (e.g. home_server foo {...} has name "foo". # # Note that ALL home servers listed here have to be of the same # type. i.e. they all have to be "auth", or they all have to # be "acct", or the all have to be "auth+acct". # home_server = localhost # Additional home servers can be listed. # There is NO LIMIT to the number of home servers that can # be listed, though using more than 10 or so will become # difficult to manage. # # home_server = foo.example.com # home_server = bar.example.com # home_server = baz.example.com # home_server = ... } ###################################################################### # # # This section defines a new-style "realm". Note the in version 2.0, # there are many fewer configuration items than in 1.x for a realm. # # Automatic proxying is done via the "realms" module (see "man # rlm_realm"). To manually proxy the request put this entry in the # "users" file: # # #DEFAULT Proxy-To-Realm := "realm_name" # # realm example.com { # # Realms point to pools of home servers. # # For authentication, the "auth_pool" configuration item # should point to a "home_server_pool" that was previously # defined. All of the home servers in the "auth_pool" must # be of type "auth". # # For accounting, the "acct_pool" configuration item # should point to a "home_server_pool" that was previously # defined. All of the home servers in the "acct_pool" must # be of type "acct". # # If you have a "home_server_pool" where all of the home servers # are of type "auth+acct", you can just use the "pool" # configuration item, instead of specifying both "auth_pool" # and "acct_pool". auth_pool = my_auth_failover # acct_pool = acct # # Normally, when an incoming User-Name is matched against the # realm, the realm name is "stripped" off, and the "stripped" # user name is used to perform matches. # # e.g. User-Name = "bob@example.com" will result in two new # attributes being created by the "realms" module: # # Stripped-User-Name = "bob" # Realm = "example.com" # # The Stripped-User-Name is then used as a key in the "users" # file, for example. # # If you do not want this to happen, uncomment "nostrip" below. # # nostrip # There are no more configuration entries for a realm. } # # This is a sample entry for iPass. # Note that you have to define "ipass_auth_pool" and # "ipass_acct_pool", along with home_servers for them, too. # #realm IPASS { # nostrip # # auth_pool = ipass_auth_pool # acct_pool = ipass_acct_pool #} # # This realm is used mainly to cancel proxying. You can have # the "realm suffix" module configured to proxy all requests for # a realm, and then later cancel the proxying, based on other # configuration. # # For example, you want to terminate PEAP or EAP-TTLS locally, # you can add the following to the "users" file: # # DEFAULT EAP-Type == PEAP, Proxy-To-Realm := LOCAL # realm LOCAL { # If we do not specify a server pool, the realm is LOCAL, and # requests are not proxied to it. } # # This realm is for requests which don't have an explicit realm # prefix or suffix. User names like "bob" will match this one. # #realm NULL { # authhost = radius.company.com:1600 # accthost = radius.company.com:1601 # secret = testing123 #} # # This realm is for ALL OTHER requests. # #realm DEFAULT { # authhost = radius.company.com:1600 # accthost = radius.company.com:1601 # secret = testing123 #}