realms

linux下的ppp协议簇开源代码； 可以进行linux内核级的pppoe拨号

# /etc/radiusclient/realms
#
# Handle realm @netservers.co.uk on an internal RADIUS server
# (note the server must be told to strip the realm)

#authserver netservers.co.uk 192.168.1.1:1812
#acctserver netservers.co.uk 192.168.1.1:1813

# users in realm @example.com are handled by separate servers

#authserver example.com 10.0.0.1:1812
#acctserver example.com 10.0.0.2:1813

# the DEFAULT realm matches users that do not supply a realm

#authserver DEFAULT 192.168.1.1:1812
#acctserver DEFAULT 192.168.1.1:1813

# Any realms that do not match in the realms file automatically fall 
# through to the standard radius plugin which uses the servers in the 
# radiusclient.conf file.  Note that this is different than the
# DEFAULT realm match, above.