This optional parameter allows you to explicitly set the
IPV6_V6ONLY option for the sockets listening to IPv6
wildcard address.
RFC 3493 “Basic Socket Interface Extensions for
IPv6” specifies a boolean socket option IPV6_V6ONLY.
When this option is turned off, IPv6 wildcard listen socket can receive
both IPv6 and IPv4 packets. Received IPv4 packets use special IPv4-mapped
address format where the IPv4 address is encoded after the 96-bit prefix
0:0:0:0:FFFF.
For example, request from IPv4 address 172.16.172.2 is
mapped to IPv6 address ::ffff:172.16.172.2. In this case you may need to
configure your Client clause as <Client
::ffff:172.16.172.2>
IPV6_V6ONLY
socket option is by default turned on by some operating systems and off by
some others.
Perl 5.16 or later or recent enough
Socket.pm CPAN module is required for this
parameter.
Note
This parameter covers only RADIUS authentication and
accounting sockets up to Radiator 4.24. Starting with 4.25 it was expanded
to other TCP, SCTP and UDP listen sockets Radiator
creates.
